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Author SHA1 Message Date
Sergey Senozhatsky
2104ebe09a UPSTREAM: zram: rename zstrm find-release functions 
This has started as a 'add zlib support' work, but after some thinking I
saw no blockers for a bigger change -- a switch to crypto API.

We don't have an idle zstreams list anymore and our write path now works
absolutely differently, preventing preemption during compression.  This
removes possibilities of read paths preempting writes at wrong places
and opens the door for a move from custom LZO/LZ4 compression backends
implementation to a more generic one, using crypto compress API.

This patch set also eliminates the need of a new context-less crypto API
interface, which was quite hard to sell, so we can move along faster.

benchmarks:

(x86_64, 4GB, zram-perf script)

perf reported run-time fio (max jobs=3).  I performed fio test with the
increasing number of parallel jobs (max to 3) on a 3G zram device, using
`static' data and the following crypto comp algorithms:

	842, deflate, lz4, lz4hc, lzo

the output was:

 - test running time (which can tell us what algorithms performs faster)

and

 - zram mm_stat (which tells the compressed memory size, max used memory, etc).

It's just for information.  for example, LZ4HC has twice the running
time of LZO, but the compressed memory size is: 23592960 vs 34603008
bytes.

  test-fio-zram-842
     197.907655282 seconds time elapsed
     201.623142884 seconds time elapsed
     226.854291345 seconds time elapsed
  test-fio-zram-DEFLATE
     253.259516155 seconds time elapsed
     258.148563401 seconds time elapsed
     290.251909365 seconds time elapsed
  test-fio-zram-LZ4
      27.022598717 seconds time elapsed
      29.580522717 seconds time elapsed
      33.293463430 seconds time elapsed
  test-fio-zram-LZ4HC
      56.393954615 seconds time elapsed
      74.904659747 seconds time elapsed
     101.940998564 seconds time elapsed
  test-fio-zram-LZO
      28.155948075 seconds time elapsed
      30.390036330 seconds time elapsed
      34.455773159 seconds time elapsed

zram mm_stat-s (max fio jobs=3)

  test-fio-zram-842
  mm_stat (jobs1): 3221225472 673185792 690266112        0 690266112        0        0
  mm_stat (jobs2): 3221225472 673185792 690266112        0 690266112        0        0
  mm_stat (jobs3): 3221225472 673185792 690266112        0 690266112        0        0
  test-fio-zram-DEFLATE
  mm_stat (jobs1): 3221225472  24379392  37761024        0  37761024        0        0
  mm_stat (jobs2): 3221225472  24379392  37761024        0  37761024        0        0
  mm_stat (jobs3): 3221225472  24379392  37761024        0  37761024        0        0
  test-fio-zram-LZ4
  mm_stat (jobs1): 3221225472  23592960  37761024        0  37761024        0        0
  mm_stat (jobs2): 3221225472  23592960  37761024        0  37761024        0        0
  mm_stat (jobs3): 3221225472  23592960  37761024        0  37761024        0        0
  test-fio-zram-LZ4HC
  mm_stat (jobs1): 3221225472  23592960  37761024        0  37761024        0        0
  mm_stat (jobs2): 3221225472  23592960  37761024        0  37761024        0        0
  mm_stat (jobs3): 3221225472  23592960  37761024        0  37761024        0        0
  test-fio-zram-LZO
  mm_stat (jobs1): 3221225472  34603008  50335744        0  50335744        0        0
  mm_stat (jobs2): 3221225472  34603008  50335744        0  50335744        0        0
  mm_stat (jobs3): 3221225472  34603008  50335744        0  50339840        0        0

This patch (of 8):

We don't perform any zstream idle list lookup anymore, so
zcomp_strm_find()/zcomp_strm_release() names are not representative.

Rename to zcomp_stream_get()/zcomp_stream_put().

Link: http://lkml.kernel.org/r/20160531122017.2878-2-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 2aea8493d3)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I2f4c9e215bca73ba5adb1354aaec6e32e420920d
 2018-08-23 12:00:16 -07:00
Sergey Senozhatsky
d3080aadc1 UPSTREAM: zram: introduce per-device debug_stat sysfs node 
debug_stat sysfs is read-only and represents various debugging data that
zram developers may need.  This file is not meant to be used by anyone
else: its content is not documented and will change any time w/o any
notice.  Therefore, the output of debug_stat file contains a version
string.  To avoid any confusion, we will increase the version number
every time we modify the output.

At the moment this file exports only one value -- the number of
re-compressions, IOW, the number of times compression fast path has
failed.  This stat is temporary any will be useful in case if any
per-cpu compression streams regressions will be reported.

Link: http://lkml.kernel.org/r/20160513230834.GB26763@bbox
Link: http://lkml.kernel.org/r/20160511134553.12655-1-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 623e47fc64)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: Ie0ef61db7aa0b2c713de1d8bf48e8a545b4276e9
 2018-08-23 12:00:16 -07:00
Sergey Senozhatsky
4b4591e992 UPSTREAM: zram: remove max_comp_streams internals 
Remove the internal part of max_comp_streams interface, since we
switched to per-cpu streams.  We will keep RW max_comp_streams attr
around, because:

a) we may (silently) switch back to idle compression streams list and
   don't want to disturb user space

b) max_comp_streams attr must wait for the next 'lay off cycle'; we
   give user space 2 years to adjust before we remove/downgrade the attr,
   and there are already several attrs scheduled for removal in 4.11, so
   it's too late for max_comp_streams.

This slightly change a user visible behaviour:

- First, reading from max_comp_stream file now will always return the
  number of online CPUs.

- Second, writing to max_comp_stream will not take any effect.

Link: http://lkml.kernel.org/r/20160503165546.25201-1-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 43209ea2d1)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I1902e741b4d3b83c5bd0d66bf1bae021dbfe2056
 2018-08-23 12:00:16 -07:00
Sergey Senozhatsky
5f0fa02cc5 UPSTREAM: zram: user per-cpu compression streams 
Remove idle streams list and keep compression streams in per-cpu data.
This removes two contented spin_lock()/spin_unlock() calls from write
path and also prevent write OP from being preempted while holding the
compression stream, which can cause slow downs.

For instance, let's assume that we have N cpus and N-2
max_comp_streams.TASK1 owns the last idle stream, TASK2-TASK3 come in
with the write requests:

  TASK1            TASK2              TASK3
 zram_bvec_write()
  spin_lock
  find stream
  spin_unlock

  compress

  <<preempted>>   zram_bvec_write()
                   spin_lock
                   find stream
                   spin_unlock
                     no_stream
                       schedule
                                     zram_bvec_write()
                                      spin_lock
                                      find_stream
                                      spin_unlock
                                        no_stream
                                          schedule
   spin_lock
   release stream
   spin_unlock
     wake up TASK2

not only TASK2 and TASK3 will not get the stream, TASK1 will be
preempted in the middle of its operation; while we would prefer it to
finish compression and release the stream.

Test environment: x86_64, 4 CPU box, 3G zram, lzo

The following fio tests were executed:
      read, randread, write, randwrite, rw, randrw
with the increasing number of jobs from 1 to 10.

                  4 streams        8 streams       per-cpu
  ===========================================================
  jobs1
  READ:           2520.1MB/s       2566.5MB/s      2491.5MB/s
  READ:           2102.7MB/s       2104.2MB/s      2091.3MB/s
  WRITE:          1355.1MB/s       1320.2MB/s      1378.9MB/s
  WRITE:          1103.5MB/s       1097.2MB/s      1122.5MB/s
  READ:           434013KB/s       435153KB/s      439961KB/s
  WRITE:          433969KB/s       435109KB/s      439917KB/s
  READ:           403166KB/s       405139KB/s      403373KB/s
  WRITE:          403223KB/s       405197KB/s      403430KB/s
  jobs2
  READ:           7958.6MB/s       8105.6MB/s      8073.7MB/s
  READ:           6864.9MB/s       6989.8MB/s      7021.8MB/s
  WRITE:          2438.1MB/s       2346.9MB/s      3400.2MB/s
  WRITE:          1994.2MB/s       1990.3MB/s      2941.2MB/s
  READ:           981504KB/s       973906KB/s      1018.8MB/s
  WRITE:          981659KB/s       974060KB/s      1018.1MB/s
  READ:           937021KB/s       938976KB/s      987250KB/s
  WRITE:          934878KB/s       936830KB/s      984993KB/s
  jobs3
  READ:           13280MB/s        13553MB/s       13553MB/s
  READ:           11534MB/s        11785MB/s       11755MB/s
  WRITE:          3456.9MB/s       3469.9MB/s      4810.3MB/s
  WRITE:          3029.6MB/s       3031.6MB/s      4264.8MB/s
  READ:           1363.8MB/s       1362.6MB/s      1448.9MB/s
  WRITE:          1361.9MB/s       1360.7MB/s      1446.9MB/s
  READ:           1309.4MB/s       1310.6MB/s      1397.5MB/s
  WRITE:          1307.4MB/s       1308.5MB/s      1395.3MB/s
  jobs4
  READ:           20244MB/s        20177MB/s       20344MB/s
  READ:           17886MB/s        17913MB/s       17835MB/s
  WRITE:          4071.6MB/s       4046.1MB/s      6370.2MB/s
  WRITE:          3608.9MB/s       3576.3MB/s      5785.4MB/s
  READ:           1824.3MB/s       1821.6MB/s      1997.5MB/s
  WRITE:          1819.8MB/s       1817.4MB/s      1992.5MB/s
  READ:           1765.7MB/s       1768.3MB/s      1937.3MB/s
  WRITE:          1767.5MB/s       1769.1MB/s      1939.2MB/s
  jobs5
  READ:           18663MB/s        18986MB/s       18823MB/s
  READ:           16659MB/s        16605MB/s       16954MB/s
  WRITE:          3912.4MB/s       3888.7MB/s      6126.9MB/s
  WRITE:          3506.4MB/s       3442.5MB/s      5519.3MB/s
  READ:           1798.2MB/s       1746.5MB/s      1935.8MB/s
  WRITE:          1792.7MB/s       1740.7MB/s      1929.1MB/s
  READ:           1727.6MB/s       1658.2MB/s      1917.3MB/s
  WRITE:          1726.5MB/s       1657.2MB/s      1916.6MB/s
  jobs6
  READ:           21017MB/s        20922MB/s       21162MB/s
  READ:           19022MB/s        19140MB/s       18770MB/s
  WRITE:          3968.2MB/s       4037.7MB/s      6620.8MB/s
  WRITE:          3643.5MB/s       3590.2MB/s      6027.5MB/s
  READ:           1871.8MB/s       1880.5MB/s      2049.9MB/s
  WRITE:          1867.8MB/s       1877.2MB/s      2046.2MB/s
  READ:           1755.8MB/s       1710.3MB/s      1964.7MB/s
  WRITE:          1750.5MB/s       1705.9MB/s      1958.8MB/s
  jobs7
  READ:           21103MB/s        20677MB/s       21482MB/s
  READ:           18522MB/s        18379MB/s       19443MB/s
  WRITE:          4022.5MB/s       4067.4MB/s      6755.9MB/s
  WRITE:          3691.7MB/s       3695.5MB/s      5925.6MB/s
  READ:           1841.5MB/s       1933.9MB/s      2090.5MB/s
  WRITE:          1842.7MB/s       1935.3MB/s      2091.9MB/s
  READ:           1832.4MB/s       1856.4MB/s      1971.5MB/s
  WRITE:          1822.3MB/s       1846.2MB/s      1960.6MB/s
  jobs8
  READ:           20463MB/s        20194MB/s       20862MB/s
  READ:           18178MB/s        17978MB/s       18299MB/s
  WRITE:          4085.9MB/s       4060.2MB/s      7023.8MB/s
  WRITE:          3776.3MB/s       3737.9MB/s      6278.2MB/s
  READ:           1957.6MB/s       1944.4MB/s      2109.5MB/s
  WRITE:          1959.2MB/s       1946.2MB/s      2111.4MB/s
  READ:           1900.6MB/s       1885.7MB/s      2082.1MB/s
  WRITE:          1896.2MB/s       1881.4MB/s      2078.3MB/s
  jobs9
  READ:           19692MB/s        19734MB/s       19334MB/s
  READ:           17678MB/s        18249MB/s       17666MB/s
  WRITE:          4004.7MB/s       4064.8MB/s      6990.7MB/s
  WRITE:          3724.7MB/s       3772.1MB/s      6193.6MB/s
  READ:           1953.7MB/s       1967.3MB/s      2105.6MB/s
  WRITE:          1953.4MB/s       1966.7MB/s      2104.1MB/s
  READ:           1860.4MB/s       1897.4MB/s      2068.5MB/s
  WRITE:          1858.9MB/s       1895.9MB/s      2066.8MB/s
  jobs10
  READ:           19730MB/s        19579MB/s       19492MB/s
  READ:           18028MB/s        18018MB/s       18221MB/s
  WRITE:          4027.3MB/s       4090.6MB/s      7020.1MB/s
  WRITE:          3810.5MB/s       3846.8MB/s      6426.8MB/s
  READ:           1956.1MB/s       1994.6MB/s      2145.2MB/s
  WRITE:          1955.9MB/s       1993.5MB/s      2144.8MB/s
  READ:           1852.8MB/s       1911.6MB/s      2075.8MB/s
  WRITE:          1855.7MB/s       1914.6MB/s      2078.1MB/s

perf stat

                                  4 streams                       8 streams                       per-cpu
  ====================================================================================================================
  jobs1
  stalled-cycles-frontend      23,174,811,209 (  38.21%)     23,220,254,188 (  38.25%)       23,061,406,918 (  38.34%)
  stalled-cycles-backend       11,514,174,638 (  18.98%)     11,696,722,657 (  19.27%)       11,370,852,810 (  18.90%)
  instructions                 73,925,005,782 (    1.22)     73,903,177,632 (    1.22)       73,507,201,037 (    1.22)
  branches                     14,455,124,835 ( 756.063)     14,455,184,779 ( 755.281)       14,378,599,509 ( 758.546)
  branch-misses                    69,801,336 (   0.48%)         80,225,529 (   0.55%)           72,044,726 (   0.50%)
  jobs2
  stalled-cycles-frontend      49,912,741,782 (  46.11%)     50,101,189,290 (  45.95%)       32,874,195,633 (  35.11%)
  stalled-cycles-backend       27,080,366,230 (  25.02%)     27,949,970,232 (  25.63%)       16,461,222,706 (  17.58%)
  instructions                122,831,629,690 (    1.13)    122,919,846,419 (    1.13)      121,924,786,775 (    1.30)
  branches                     23,725,889,239 ( 692.663)     23,733,547,140 ( 688.062)       23,553,950,311 ( 794.794)
  branch-misses                    90,733,041 (   0.38%)         96,320,895 (   0.41%)           84,561,092 (   0.36%)
  jobs3
  stalled-cycles-frontend      66,437,834,608 (  45.58%)     63,534,923,344 (  43.69%)       42,101,478,505 (  33.19%)
  stalled-cycles-backend       34,940,799,661 (  23.97%)     34,774,043,148 (  23.91%)       21,163,324,388 (  16.68%)
  instructions                171,692,121,862 (    1.18)    171,775,373,044 (    1.18)      170,353,542,261 (    1.34)
  branches                     32,968,962,622 ( 628.723)     32,987,739,894 ( 630.512)       32,729,463,918 ( 717.027)
  branch-misses                   111,522,732 (   0.34%)        110,472,894 (   0.33%)           99,791,291 (   0.30%)
  jobs4
  stalled-cycles-frontend      98,741,701,675 (  49.72%)     94,797,349,965 (  47.59%)       54,535,655,381 (  33.53%)
  stalled-cycles-backend       54,642,609,615 (  27.51%)     55,233,554,408 (  27.73%)       27,882,323,541 (  17.14%)
  instructions                220,884,807,851 (    1.11)    220,930,887,273 (    1.11)      218,926,845,851 (    1.35)
  branches                     42,354,518,180 ( 592.105)     42,362,770,587 ( 590.452)       41,955,552,870 ( 716.154)
  branch-misses                   138,093,449 (   0.33%)        131,295,286 (   0.31%)          121,794,771 (   0.29%)
  jobs5
  stalled-cycles-frontend     116,219,747,212 (  48.14%)    110,310,397,012 (  46.29%)       66,373,082,723 (  33.70%)
  stalled-cycles-backend       66,325,434,776 (  27.48%)     64,157,087,914 (  26.92%)       32,999,097,299 (  16.76%)
  instructions                270,615,008,466 (    1.12)    270,546,409,525 (    1.14)      268,439,910,948 (    1.36)
  branches                     51,834,046,557 ( 599.108)     51,811,867,722 ( 608.883)       51,412,576,077 ( 729.213)
  branch-misses                   158,197,086 (   0.31%)        142,639,805 (   0.28%)          133,425,455 (   0.26%)
  jobs6
  stalled-cycles-frontend     138,009,414,492 (  48.23%)    139,063,571,254 (  48.80%)       75,278,568,278 (  32.80%)
  stalled-cycles-backend       79,211,949,650 (  27.68%)     79,077,241,028 (  27.75%)       37,735,797,899 (  16.44%)
  instructions                319,763,993,731 (    1.12)    319,937,782,834 (    1.12)      316,663,600,784 (    1.38)
  branches                     61,219,433,294 ( 595.056)     61,250,355,540 ( 598.215)       60,523,446,617 ( 733.706)
  branch-misses                   169,257,123 (   0.28%)        154,898,028 (   0.25%)          141,180,587 (   0.23%)
  jobs7
  stalled-cycles-frontend     162,974,812,119 (  49.20%)    159,290,061,987 (  48.43%)       88,046,641,169 (  33.21%)
  stalled-cycles-backend       92,223,151,661 (  27.84%)     91,667,904,406 (  27.87%)       44,068,454,971 (  16.62%)
  instructions                369,516,432,430 (    1.12)    369,361,799,063 (    1.12)      365,290,380,661 (    1.38)
  branches                     70,795,673,950 ( 594.220)     70,743,136,124 ( 597.876)       69,803,996,038 ( 732.822)
  branch-misses                   181,708,327 (   0.26%)        165,767,821 (   0.23%)          150,109,797 (   0.22%)
  jobs8
  stalled-cycles-frontend     185,000,017,027 (  49.30%)    182,334,345,473 (  48.37%)       99,980,147,041 (  33.26%)
  stalled-cycles-backend      105,753,516,186 (  28.18%)    107,937,830,322 (  28.63%)       51,404,177,181 (  17.10%)
  instructions                418,153,161,055 (    1.11)    418,308,565,828 (    1.11)      413,653,475,581 (    1.38)
  branches                     80,035,882,398 ( 592.296)     80,063,204,510 ( 589.843)       79,024,105,589 ( 730.530)
  branch-misses                   199,764,528 (   0.25%)        177,936,926 (   0.22%)          160,525,449 (   0.20%)
  jobs9
  stalled-cycles-frontend     210,941,799,094 (  49.63%)    204,714,679,254 (  48.55%)      114,251,113,756 (  33.96%)
  stalled-cycles-backend      122,640,849,067 (  28.85%)    122,188,553,256 (  28.98%)       58,360,041,127 (  17.35%)
  instructions                468,151,025,415 (    1.10)    467,354,869,323 (    1.11)      462,665,165,216 (    1.38)
  branches                     89,657,067,510 ( 585.628)     89,411,550,407 ( 588.990)       88,360,523,943 ( 730.151)
  branch-misses                   218,292,301 (   0.24%)        191,701,247 (   0.21%)          178,535,678 (   0.20%)
  jobs10
  stalled-cycles-frontend     233,595,958,008 (  49.81%)    227,540,615,689 (  49.11%)      160,341,979,938 (  43.07%)
  stalled-cycles-backend      136,153,676,021 (  29.03%)    133,635,240,742 (  28.84%)       65,909,135,465 (  17.70%)
  instructions                517,001,168,497 (    1.10)    516,210,976,158 (    1.11)      511,374,038,613 (    1.37)
  branches                     98,911,641,329 ( 585.796)     98,700,069,712 ( 591.583)       97,646,761,028 ( 728.712)
  branch-misses                   232,341,823 (   0.23%)        199,256,308 (   0.20%)          183,135,268 (   0.19%)

per-cpu streams tend to cause significantly less stalled cycles; execute
less branches and hit less branch-misses.

perf stat reported execution time

                          4 streams        8 streams       per-cpu
  ====================================================================
  jobs1
  seconds elapsed        20.909073870     20.875670495    20.817838540
  jobs2
  seconds elapsed        18.529488399     18.720566469    16.356103108
  jobs3
  seconds elapsed        18.991159531     18.991340812    16.766216066
  jobs4
  seconds elapsed        19.560643828     19.551323547    16.246621715
  jobs5
  seconds elapsed        24.746498464     25.221646740    20.696112444
  jobs6
  seconds elapsed        28.258181828     28.289765505    22.885688857
  jobs7
  seconds elapsed        32.632490241     31.909125381    26.272753738
  jobs8
  seconds elapsed        35.651403851     36.027596308    29.108024711
  jobs9
  seconds elapsed        40.569362365     40.024227989    32.898204012
  jobs10
  seconds elapsed        44.673112304     43.874898137    35.632952191

Please see
  Link: http://marc.info/?l=linux-kernel&m=146166970727530
  Link: http://marc.info/?l=linux-kernel&m=146174716719650
for more test results (under low memory conditions).

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Suggested-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit da9556a236)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I1af1a466f0ac3f74f9c36f06685111ccef0f4ec4
 2018-08-23 12:00:15 -07:00
Sergey Senozhatsky
bece429b72 BACKPORT: zsmalloc: require GFP in zs_malloc() 
Pass GFP flags to zs_malloc() instead of using a fixed mask supplied to
zs_create_pool(), so we can be more flexible, but, more importantly, we
need this to switch zram to per-cpu compression streams -- zram will try
to allocate handle with preemption disabled in a fast path and switch to
a slow path (using different gfp mask) if the fast one has failed.

Apart from that, this also align zs_malloc() interface with zspool/zbud.

[sergey.senozhatsky@gmail.com: pass GFP flags to zs_malloc() instead of using a fixed mask]
  Link: http://lkml.kernel.org/r/20160429150942.GA637@swordfish
Link: http://lkml.kernel.org/r/20160429150942.GA637@swordfish
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit d0d8da2dc4)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I31276c9351be21a4ed588681b332e98142b76526
 2018-08-23 12:00:15 -07:00
Sergey Senozhatsky
6982182465 UPSTREAM: zram/zcomp: do not zero out zcomp private pages 
Do not __GFP_ZERO allocated zcomp ->private pages.  We keep allocated
streams around and use them for read/write requests, so we supply a
zeroed out ->private to compression algorithm as a scratch buffer only
once -- the first time we use that stream.  For the rest of IO requests
served by this stream ->private usually contains some temporarily data
from the previous requests.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit e02d238c98)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I911832da703f596998a4139d6033ef1564848c9e
 2018-08-23 12:00:15 -07:00
Minchan Kim
dc5f588d8b UPSTREAM: zram: pass gfp from zcomp frontend to backend 
Each zcomp backend uses own gfp flag but it's pointless because the
context they could be called is driven by upper layer(ie, zcomp
frontend).  As well, zcomp frondend could call them in different
context.  One context(ie, zram init part) is it should be better to make
sure successful allocation other context(ie, further stream allocation
part for accelarating I/O speed) is just optional so let's pass gfp down
from driver (ie, zcomp frontend) like normal MM convention.

[sergey.senozhatsky@gmail.com: add missing __vmalloc zero and highmem gfps]
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 75d8947a36)
Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 112488418
Change-Id: I572d0565de5aff94ebe0782eba9d34f9c9862060
 2018-08-23 11:59:44 -07:00
Cong Wang
3a2ec581f8 UPSTREAM: socket: close race condition between sock_close() and sockfs_setattr() 
fchownat() doesn't even hold refcnt of fd until it figures out
fd is really needed (otherwise is ignored) and releases it after
it resolves the path. This means sock_close() could race with
sockfs_setattr(), which leads to a NULL pointer dereference
since typically we set sock->sk to NULL in ->release().

As pointed out by Al, this is unique to sockfs. So we can fix this
in socket layer by acquiring inode_lock in sock_close() and
checking against NULL in sockfs_setattr().

sock_release() is called in many places, only the sock_close()
path matters here. And fortunately, this should not affect normal
sock_close() as it is only called when the last fd refcnt is gone.
It only affects sock_close() with a parallel sockfs_setattr() in
progress, which is not common.

Fixes: 86741ec254 ("net: core: Add a UID field to struct sock.")
Reported-by: shankarapailoor <shankarapailoor@gmail.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

(cherry picked from commit 6d8c50dcb0)
Signed-off-by: Chenbo Feng <fengc@google.com>

Bug: 112220999
Test: syzcaller reproducer doesn't trigger the crash anymore
Change-Id: I90bec1515889e0dfd23f94e3f29b366c7bbfcd11
 2018-08-23 17:30:17 +00:00
Alistair Strachan
37af2ff398 ANDROID: Refresh x86_64_cuttlefish_defconfig 
An LTS change removed the need to set a config option. This broke the
comparison validation with the output of "make savedefconfig".

Change-Id: Id7ed6c6546d0efe88b67c0d1b92183152406e6f6
Signed-off-by: Alistair Strachan <astrachan@google.com>
 2018-08-22 17:08:16 -07:00
Greg Kroah-Hartman
e917467d97 Merge 4.4.151 into android-4.4 
Changes in 4.4.151
	dccp: fix undefined behavior with 'cwnd' shift in ccid2_cwnd_restart()
	l2tp: use sk_dst_check() to avoid race on sk->sk_dst_cache
	llc: use refcount_inc_not_zero() for llc_sap_find()
	net_sched: Fix missing res info when create new tc_index filter
	vsock: split dwork to avoid reinitializations
	net_sched: fix NULL pointer dereference when delete tcindex filter
	ALSA: hda - Sleep for 10ms after entering D3 on Conexant codecs
	ALSA: hda - Turn CX8200 into D3 as well upon reboot
	ALSA: vx222: Fix invalid endian conversions
	ALSA: virmidi: Fix too long output trigger loop
	ALSA: cs5535audio: Fix invalid endian conversion
	ALSA: hda: Correct Asrock B85M-ITX power_save blacklist entry
	ALSA: memalloc: Don't exceed over the requested size
	ALSA: vxpocket: Fix invalid endian conversions
	USB: serial: sierra: fix potential deadlock at close
	USB: option: add support for DW5821e
	ACPI: save NVS memory for Lenovo G50-45
	ACPI / PM: save NVS memory for ASUS 1025C laptop
	serial: 8250_dw: always set baud rate in dw8250_set_termios
	x86/mm: Simplify p[g4um]d_page() macros
	Bluetooth: avoid killing an already killed socket
	isdn: Disable IIOCDBGVAR
	Linux 4.4.151

Change-Id: I717cee04f3c1a5c7fbacf696e0a5c32ca67aedf8
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2018-08-22 08:08:40 +02:00
Greg Kroah-Hartman
78f654f6cc Linux 4.4.151 2018-08-22 07:48:38 +02:00
Kees Cook
3b6393e30e isdn: Disable IIOCDBGVAR 
[ Upstream commit 5e22002aa8 ]

It was possible to directly leak the kernel address where the isdn_dev
structure pointer was stored. This is a kernel ASLR bypass for anyone
with access to the ioctl. The code had been present since the beginning
of git history, though this shouldn't ever be needed for normal operation,
therefore remove it.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:38 +02:00
Sudip Mukherjee
9aeef6b667 Bluetooth: avoid killing an already killed socket 
commit 4e1a720d03 upstream.

slub debug reported:

[  440.648642] =============================================================================
[  440.648649] BUG kmalloc-1024 (Tainted: G    BU     O   ): Poison overwritten
[  440.648651] -----------------------------------------------------------------------------

[  440.648655] INFO: 0xe70f4bec-0xe70f4bec. First byte 0x6a instead of 0x6b
[  440.648665] INFO: Allocated in sk_prot_alloc+0x6b/0xc6 age=33155 cpu=1 pid=1047
[  440.648671] 	___slab_alloc.constprop.24+0x1fc/0x292
[  440.648675] 	__slab_alloc.isra.18.constprop.23+0x1c/0x25
[  440.648677] 	__kmalloc+0xb6/0x17f
[  440.648680] 	sk_prot_alloc+0x6b/0xc6
[  440.648683] 	sk_alloc+0x1e/0xa1
[  440.648700] 	sco_sock_alloc.constprop.6+0x26/0xaf [bluetooth]
[  440.648716] 	sco_connect_cfm+0x166/0x281 [bluetooth]
[  440.648731] 	hci_conn_request_evt.isra.53+0x258/0x281 [bluetooth]
[  440.648746] 	hci_event_packet+0x28b/0x2326 [bluetooth]
[  440.648759] 	hci_rx_work+0x161/0x291 [bluetooth]
[  440.648764] 	process_one_work+0x163/0x2b2
[  440.648767] 	worker_thread+0x1a9/0x25c
[  440.648770] 	kthread+0xf8/0xfd
[  440.648774] 	ret_from_fork+0x2e/0x38
[  440.648779] INFO: Freed in __sk_destruct+0xd3/0xdf age=3815 cpu=1 pid=1047
[  440.648782] 	__slab_free+0x4b/0x27a
[  440.648784] 	kfree+0x12e/0x155
[  440.648787] 	__sk_destruct+0xd3/0xdf
[  440.648790] 	sk_destruct+0x27/0x29
[  440.648793] 	__sk_free+0x75/0x91
[  440.648795] 	sk_free+0x1c/0x1e
[  440.648810] 	sco_sock_kill+0x5a/0x5f [bluetooth]
[  440.648825] 	sco_conn_del+0x8e/0xba [bluetooth]
[  440.648840] 	sco_disconn_cfm+0x3a/0x41 [bluetooth]
[  440.648855] 	hci_event_packet+0x45e/0x2326 [bluetooth]
[  440.648868] 	hci_rx_work+0x161/0x291 [bluetooth]
[  440.648872] 	process_one_work+0x163/0x2b2
[  440.648875] 	worker_thread+0x1a9/0x25c
[  440.648877] 	kthread+0xf8/0xfd
[  440.648880] 	ret_from_fork+0x2e/0x38
[  440.648884] INFO: Slab 0xf4718580 objects=27 used=27 fp=0x  (null) flags=0x40008100
[  440.648886] INFO: Object 0xe70f4b88 @offset=19336 fp=0xe70f54f8

When KASAN was enabled, it reported:

[  210.096613] ==================================================================
[  210.096634] BUG: KASAN: use-after-free in ex_handler_refcount+0x5b/0x127
[  210.096641] Write of size 4 at addr ffff880107e17160 by task kworker/u9:1/2040

[  210.096651] CPU: 1 PID: 2040 Comm: kworker/u9:1 Tainted: G     U     O    4.14.47-20180606+ #2
[  210.096654] Hardware name: , BIOS 2017.01-00087-g43e04de 08/30/2017
[  210.096693] Workqueue: hci0 hci_rx_work [bluetooth]
[  210.096698] Call Trace:
[  210.096711]  dump_stack+0x46/0x59
[  210.096722]  print_address_description+0x6b/0x23b
[  210.096729]  ? ex_handler_refcount+0x5b/0x127
[  210.096736]  kasan_report+0x220/0x246
[  210.096744]  ex_handler_refcount+0x5b/0x127
[  210.096751]  ? ex_handler_clear_fs+0x85/0x85
[  210.096757]  fixup_exception+0x8c/0x96
[  210.096766]  do_trap+0x66/0x2c1
[  210.096773]  do_error_trap+0x152/0x180
[  210.096781]  ? fixup_bug+0x78/0x78
[  210.096817]  ? hci_debugfs_create_conn+0x244/0x26a [bluetooth]
[  210.096824]  ? __schedule+0x113b/0x1453
[  210.096830]  ? sysctl_net_exit+0xe/0xe
[  210.096837]  ? __wake_up_common+0x343/0x343
[  210.096843]  ? insert_work+0x107/0x163
[  210.096850]  invalid_op+0x1b/0x40
[  210.096888] RIP: 0010:hci_debugfs_create_conn+0x244/0x26a [bluetooth]
[  210.096892] RSP: 0018:ffff880094a0f970 EFLAGS: 00010296
[  210.096898] RAX: 0000000000000000 RBX: ffff880107e170e8 RCX: ffff880107e17160
[  210.096902] RDX: 000000000000002f RSI: ffff88013b80ed40 RDI: ffffffffa058b940
[  210.096906] RBP: ffff88011b2b0578 R08: 00000000852f0ec9 R09: ffffffff81cfcf9b
[  210.096909] R10: 00000000d21bdad7 R11: 0000000000000001 R12: ffff8800967b0488
[  210.096913] R13: ffff880107e17168 R14: 0000000000000068 R15: ffff8800949c0008
[  210.096920]  ? __sk_destruct+0x2c6/0x2d4
[  210.096959]  hci_event_packet+0xff5/0x7de2 [bluetooth]
[  210.096969]  ? __local_bh_enable_ip+0x43/0x5b
[  210.097004]  ? l2cap_sock_recv_cb+0x158/0x166 [bluetooth]
[  210.097039]  ? hci_le_meta_evt+0x2bb3/0x2bb3 [bluetooth]
[  210.097075]  ? l2cap_ertm_init+0x94e/0x94e [bluetooth]
[  210.097093]  ? xhci_urb_enqueue+0xbd8/0xcf5 [xhci_hcd]
[  210.097102]  ? __accumulate_pelt_segments+0x24/0x33
[  210.097109]  ? __accumulate_pelt_segments+0x24/0x33
[  210.097115]  ? __update_load_avg_se.isra.2+0x217/0x3a4
[  210.097122]  ? set_next_entity+0x7c3/0x12cd
[  210.097128]  ? pick_next_entity+0x25e/0x26c
[  210.097135]  ? pick_next_task_fair+0x2ca/0xc1a
[  210.097141]  ? switch_mm_irqs_off+0x346/0xb4f
[  210.097147]  ? __switch_to+0x769/0xbc4
[  210.097153]  ? compat_start_thread+0x66/0x66
[  210.097188]  ? hci_conn_check_link_mode+0x1cd/0x1cd [bluetooth]
[  210.097195]  ? finish_task_switch+0x392/0x431
[  210.097228]  ? hci_rx_work+0x154/0x487 [bluetooth]
[  210.097260]  hci_rx_work+0x154/0x487 [bluetooth]
[  210.097269]  process_one_work+0x579/0x9e9
[  210.097277]  worker_thread+0x68f/0x804
[  210.097285]  kthread+0x31c/0x32b
[  210.097292]  ? rescuer_thread+0x70c/0x70c
[  210.097299]  ? kthread_create_on_node+0xa3/0xa3
[  210.097306]  ret_from_fork+0x35/0x40

[  210.097314] Allocated by task 2040:
[  210.097323]  kasan_kmalloc.part.1+0x51/0xc7
[  210.097328]  __kmalloc+0x17f/0x1b6
[  210.097335]  sk_prot_alloc+0xf2/0x1a3
[  210.097340]  sk_alloc+0x22/0x297
[  210.097375]  sco_sock_alloc.constprop.7+0x23/0x202 [bluetooth]
[  210.097410]  sco_connect_cfm+0x2d0/0x566 [bluetooth]
[  210.097443]  hci_conn_request_evt.isra.53+0x6d3/0x762 [bluetooth]
[  210.097476]  hci_event_packet+0x85e/0x7de2 [bluetooth]
[  210.097507]  hci_rx_work+0x154/0x487 [bluetooth]
[  210.097512]  process_one_work+0x579/0x9e9
[  210.097517]  worker_thread+0x68f/0x804
[  210.097523]  kthread+0x31c/0x32b
[  210.097529]  ret_from_fork+0x35/0x40

[  210.097533] Freed by task 2040:
[  210.097539]  kasan_slab_free+0xb3/0x15e
[  210.097544]  kfree+0x103/0x1a9
[  210.097549]  __sk_destruct+0x2c6/0x2d4
[  210.097584]  sco_conn_del.isra.1+0xba/0x10e [bluetooth]
[  210.097617]  hci_event_packet+0xff5/0x7de2 [bluetooth]
[  210.097648]  hci_rx_work+0x154/0x487 [bluetooth]
[  210.097653]  process_one_work+0x579/0x9e9
[  210.097658]  worker_thread+0x68f/0x804
[  210.097663]  kthread+0x31c/0x32b
[  210.097670]  ret_from_fork+0x35/0x40

[  210.097676] The buggy address belongs to the object at ffff880107e170e8
 which belongs to the cache kmalloc-1024 of size 1024
[  210.097681] The buggy address is located 120 bytes inside of
 1024-byte region [ffff880107e170e8, ffff880107e174e8)
[  210.097683] The buggy address belongs to the page:
[  210.097689] page:ffffea00041f8400 count:1 mapcount:0 mapping:          (null) index:0xffff880107e15b68 compound_mapcount: 0
[  210.110194] flags: 0x8000000000008100(slab|head)
[  210.115441] raw: 8000000000008100 0000000000000000 ffff880107e15b68 0000000100170016
[  210.115448] raw: ffffea0004a47620 ffffea0004b48e20 ffff88013b80ed40 0000000000000000
[  210.115451] page dumped because: kasan: bad access detected

[  210.115454] Memory state around the buggy address:
[  210.115460]  ffff880107e17000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  210.115465]  ffff880107e17080: fc fc fc fc fc fc fc fc fc fc fc fc fc fb fb fb
[  210.115469] >ffff880107e17100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  210.115472]                                                        ^
[  210.115477]  ffff880107e17180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  210.115481]  ffff880107e17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  210.115483] ==================================================================

And finally when BT_DBG() and ftrace was enabled it showed:

       <...>-14979 [001] ....   186.104191: sco_sock_kill <-sco_sock_close
       <...>-14979 [001] ....   186.104191: sco_sock_kill <-sco_sock_release
       <...>-14979 [001] ....   186.104192: sco_sock_kill: sk ef0497a0 state 9
       <...>-14979 [001] ....   186.104193: bt_sock_unlink <-sco_sock_kill
kworker/u9:2-792   [001] ....   186.104246: sco_sock_kill <-sco_conn_del
kworker/u9:2-792   [001] ....   186.104248: sco_sock_kill: sk ef0497a0 state 9
kworker/u9:2-792   [001] ....   186.104249: bt_sock_unlink <-sco_sock_kill
kworker/u9:2-792   [001] ....   186.104250: sco_sock_destruct <-__sk_destruct
kworker/u9:2-792   [001] ....   186.104250: sco_sock_destruct: sk ef0497a0
kworker/u9:2-792   [001] ....   186.104860: hci_conn_del <-hci_event_packet
kworker/u9:2-792   [001] ....   186.104864: hci_conn_del: hci0 hcon ef0484c0 handle 266

Only in the failed case, sco_sock_kill() gets called with the same sock
pointer two times. Add a check for SOCK_DEAD to avoid continue killing
a socket which has already been killed.

Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
Tom Lendacky
5069ddd8f9 x86/mm: Simplify p[g4um]d_page() macros 
commit fd7e315988 upstream.

Create a pgd_pfn() macro similar to the p[4um]d_pfn() macros and then
use the p[g4um]d_pfn() macros in the p[g4um]d_page() macros instead of
duplicating the code.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Toshimitsu Kani <toshi.kani@hpe.com>
Cc: kasan-dev@googlegroups.com
Cc: kvm@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/e61eb533a6d0aac941db2723d8aa63ef6b882dee.1500319216.git.thomas.lendacky@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[Backported to 4.9 stable by AK, suggested by Michael Hocko]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
Chen Hu
b4d2c57717 serial: 8250_dw: always set baud rate in dw8250_set_termios 
commit dfcab6ba57 upstream.

dw8250_set_termios() doesn't set baud rate if the arg "old ktermios" is
NULL. This happens during resume.
Call Trace:
...
[   54.928108] dw8250_set_termios+0x162/0x170
[   54.928114] serial8250_set_termios+0x17/0x20
[   54.928117] uart_change_speed+0x64/0x160
[   54.928119] uart_resume_port
...

So the baud rate is not restored after S3 and breaks the apps who use
UART, for example, console and bluetooth etc.

We address this issue by setting the baud rate irrespective of arg
"old", just like the drivers for other 8250 IPs. This is tested with
Intel Broxton platform.

Signed-off-by: Chen Hu <hu1.chen@intel.com>
Fixes: 4e26b134bd ("serial: 8250_dw: clock rate handling for all ACPI platforms")
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
Willy Tarreau
c2650d43a4 ACPI / PM: save NVS memory for ASUS 1025C laptop 
commit 231f941500 upstream.

Every time I tried to upgrade my laptop from 3.10.x to 4.x I faced an
issue by which the fan would run at full speed upon resume. Bisecting
it showed me the issue was introduced in 3.17 by commit 821d6f0359
(ACPI / sleep: Do not save NVS for new machines to accelerate S3). This
code only affects machines built starting as of 2012, but this Asus
1025C laptop was made in 2012 and apparently needs the NVS data to be
saved, otherwise the CPU's thermal state is not properly reported on
resume and the fan runs at full speed upon resume.

Here's a very simple way to check if such a machine is affected :

  # cat /sys/class/thermal/thermal_zone0/temp
  55000

  ( now suspend, wait one second and resume )

  # cat /sys/class/thermal/thermal_zone0/temp
  0

  (and after ~15 seconds the fan starts to spin)

Let's apply the same quirk as commit cbc00c13 (ACPI: save NVS memory
for Lenovo G50-45) and reuse the function it provides. Note that this
commit was already backported to 4.9.x but not 4.4.x.

Cc: 3.17+ <stable@vger.kernel.org> # 3.17+: requires cbc00c13
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
Zhang Rui
3f9ca472b2 ACPI: save NVS memory for Lenovo G50-45 
commit cbc00c1310 upstream.

In commit 821d6f0359 (ACPI / sleep: Do not save NVS for new machines to
accelerate S3), to optimize S3 suspend/resume speed, code is introduced
to ignore NVS memory saving during S3 for all the platforms later than
2012.

But, Lenovo G50-45, a platform released in 2015, still needs NVS memory
saving during S3. A quirk is introduced for this platform.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=189431
Tested-by: Przemek <soprwa@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[ rjw: Drop unnecessary code ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
Aleksander Morgado
39cd328e84 USB: option: add support for DW5821e 
commit 7bab01ecc6 upstream.

The device exposes AT, NMEA and DIAG ports in both USB configurations.

The patch explicitly ignores interfaces 0 and 1, as they're bound to
other drivers already; and also interface 6, which is a GNSS interface
for which we don't have a driver yet.

T:  Bus=01 Lev=03 Prnt=04 Port=00 Cnt=01 Dev#= 18 Spd=480 MxCh= 0
D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  2
P:  Vendor=413c ProdID=81d7 Rev=03.18
S:  Manufacturer=DELL
S:  Product=DW5821e Snapdragon X20 LTE
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 7 Cfg#= 2 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 6 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)

T:  Bus=01 Lev=03 Prnt=04 Port=00 Cnt=01 Dev#= 16 Spd=480 MxCh= 0
D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  2
P:  Vendor=413c ProdID=81d7 Rev=03.18
S:  Manufacturer=DELL
S:  Product=DW5821e Snapdragon X20 LTE
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I:  If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
John Ogness
a8587cb96a USB: serial: sierra: fix potential deadlock at close 
commit e60870012e upstream.

The portdata spinlock can be taken in interrupt context (via
sierra_outdat_callback()).
Disable interrupts when taking the portdata spinlock when discarding
deferred URBs during close to prevent a possible deadlock.

Fixes: 014333f77c ("USB: sierra: fix urb and memory leak on disconnect")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[ johan: amend commit message and add fixes and stable tags ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:37 +02:00
Takashi Iwai
09b56641dd ALSA: vxpocket: Fix invalid endian conversions 
commit 3acd3e3bab upstream.

The endian conversions used in vxp_dma_read() and vxp_dma_write() are
superfluous and even wrong on big-endian machines, as inw() and outw()
already do conversions.  Kill them.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Takashi Iwai
dd65a18b20 ALSA: memalloc: Don't exceed over the requested size 
commit dfef01e150 upstream.

snd_dma_alloc_pages_fallback() tries to allocate pages again when the
allocation fails with reduced size.  But the first try actually
*increases* the size to power-of-two, which may give back a larger
chunk than the requested size.  This confuses the callers, e.g. sgbuf
assumes that the size is equal or less, and it may result in a bad
loop due to the underflow and eventually lead to Oops.

The code of this function seems incorrectly assuming the usage of
get_order().  We need to decrease at first, then align to
power-of-two.

Reported-and-tested-by: he, bo <bo.he@intel.com>
Reported-by: zhang jun <jun.zhang@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Hans de Goede
ad76ea373e ALSA: hda: Correct Asrock B85M-ITX power_save blacklist entry 
commit 8e82a72879 upstream.

I added the subsys product-id for the HDMI HDA device rather then for
the PCH one, this commit fixes this.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1525104
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Takashi Iwai
dbc8ab8952 ALSA: cs5535audio: Fix invalid endian conversion 
commit 69756930f2 upstream.

One place in cs5535audio_build_dma_packets() does an extra conversion
via cpu_to_le32(); namely jmpprd_addr is passed to setup_prd() ops,
which writes the value via cs_writel().  That is, the callback does
the conversion by itself, and we don't need to convert beforehand.

This patch fixes that bogus conversion.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Takashi Iwai
8419b74a43 ALSA: virmidi: Fix too long output trigger loop 
commit 50e9ffb199 upstream.

The virmidi output trigger tries to parse the all available bytes and
process sequencer events as much as possible.  In a normal situation,
this is supposed to be relatively short, but a program may give a huge
buffer and it'll take a long time in a single spin lock, which may
eventually lead to a soft lockup.

This patch simply adds a workaround, a cond_resched() call in the loop
if applicable.  A better solution would be to move the event processor
into a work, but let's put a duct-tape quickly at first.

Reported-and-tested-by: Dae R. Jeong <threeearcat@gmail.com>
Reported-by: syzbot+619d9f40141d826b097e@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Takashi Iwai
c48a18584d ALSA: vx222: Fix invalid endian conversions 
commit fff71a4c05 upstream.

The endian conversions used in vx2_dma_read() and vx2_dma_write() are
superfluous and even wrong on big-endian machines, as inl() and outl()
already do conversions.  Kill them.

Spotted by sparse, a warning like:
  sound/pci/vx222/vx222_ops.c:278:30: warning: incorrect type in argument 1 (different base types)

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Park Ju Hyung
caf8fe5173 ALSA: hda - Turn CX8200 into D3 as well upon reboot 
commit d77a4b4a5b upstream.

As an equivalent codec with CX20724,
CX8200 is also subject to the reboot bug.

Late 2017 and 2018 LG Gram and some HP Spectre laptops are known victims
to this issue, causing extremely loud noises upon reboot.

Now that we know that this bug is subject to multiple codecs,
fix the comment as well.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:36 +02:00
Park Ju Hyung
1b692b786b ALSA: hda - Sleep for 10ms after entering D3 on Conexant codecs 
commit f59cf9a055 upstream.

On rare occasions, we are still noticing that the internal speaker
spitting out spurious noises even after adding the problematic codec
to the list.

Adding a 10ms artificial delay before rebooting fixes the issue entirely.

Patch for Realtek codecs also adds the same amount of delay after
entering D3.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Hangbin Liu
51f6a134cf net_sched: fix NULL pointer dereference when delete tcindex filter 
[ Upstream commit 2df8bee565 ]

Li Shuang reported the following crash:

[   71.267724] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
[   71.276456] PGD 800000085d9bd067 P4D 800000085d9bd067 PUD 859a0b067 PMD 0
[   71.284127] Oops: 0000 [#1] SMP PTI
[   71.288015] CPU: 12 PID: 2386 Comm: tc Not tainted 4.18.0-rc8.latest+ #131
[   71.295686] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.1.5 04/11/2016
[   71.304037] RIP: 0010:tcindex_delete+0x72/0x280 [cls_tcindex]
[   71.310446] Code: 00 31 f6 48 87 75 20 48 85 f6 74 11 48 8b 47 18 48 8b 40 08 48 8b 40 50 e8 fb a6 f8 fc 48 85 db 0f 84 dc 00 00 00 48 8b 73 18 <8b> 56 04 48 8d 7e 04 85 d2 0f 84 7b 01 00
[   71.331517] RSP: 0018:ffffb45207b3f898 EFLAGS: 00010282
[   71.337345] RAX: ffff8ad3d72d6360 RBX: ffff8acc84393680 RCX: 000000000000002e
[   71.345306] RDX: ffff8ad3d72c8570 RSI: 0000000000000000 RDI: ffff8ad847a45800
[   71.353277] RBP: ffff8acc84393688 R08: ffff8ad3d72c8400 R09: 0000000000000000
[   71.361238] R10: ffff8ad3de786e00 R11: 0000000000000000 R12: ffffb45207b3f8c7
[   71.369199] R13: ffff8ad3d93bd2a0 R14: 000000000000002e R15: ffff8ad3d72c9600
[   71.377161] FS:  00007f9d3ec3e740(0000) GS:ffff8ad3df980000(0000) knlGS:0000000000000000
[   71.386188] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   71.392597] CR2: 0000000000000004 CR3: 0000000852f06003 CR4: 00000000001606e0
[   71.400558] Call Trace:
[   71.403299]  tcindex_destroy_element+0x25/0x40 [cls_tcindex]
[   71.409611]  tcindex_walk+0xbb/0x110 [cls_tcindex]
[   71.414953]  tcindex_destroy+0x44/0x90 [cls_tcindex]
[   71.420492]  ? tcindex_delete+0x280/0x280 [cls_tcindex]
[   71.426323]  tcf_proto_destroy+0x16/0x40
[   71.430696]  tcf_chain_flush+0x51/0x70
[   71.434876]  tcf_block_put_ext.part.30+0x8f/0x1b0
[   71.440122]  tcf_block_put+0x4d/0x70
[   71.444108]  cbq_destroy+0x4d/0xd0 [sch_cbq]
[   71.448869]  qdisc_destroy+0x62/0x130
[   71.452951]  dsmark_destroy+0x2a/0x70 [sch_dsmark]
[   71.458300]  qdisc_destroy+0x62/0x130
[   71.462373]  qdisc_graft+0x3ba/0x470
[   71.466359]  tc_get_qdisc+0x2a6/0x2c0
[   71.470443]  ? cred_has_capability+0x7d/0x130
[   71.475307]  rtnetlink_rcv_msg+0x263/0x2d0
[   71.479875]  ? rtnl_calcit.isra.30+0x110/0x110
[   71.484832]  netlink_rcv_skb+0x4d/0x130
[   71.489109]  netlink_unicast+0x1a3/0x250
[   71.493482]  netlink_sendmsg+0x2ae/0x3a0
[   71.497859]  sock_sendmsg+0x36/0x40
[   71.501748]  ___sys_sendmsg+0x26f/0x2d0
[   71.506029]  ? handle_pte_fault+0x586/0xdf0
[   71.510694]  ? __handle_mm_fault+0x389/0x500
[   71.515457]  ? __sys_sendmsg+0x5e/0xa0
[   71.519636]  __sys_sendmsg+0x5e/0xa0
[   71.523626]  do_syscall_64+0x5b/0x180
[   71.527711]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   71.533345] RIP: 0033:0x7f9d3e257f10
[   71.537331] Code: c3 48 8b 05 82 6f 2c 00 f7 db 64 89 18 48 83 cb ff eb dd 0f 1f 80 00 00 00 00 83 3d 8d d0 2c 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8
[   71.558401] RSP: 002b:00007fff6f893398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   71.566848] RAX: ffffffffffffffda RBX: 000000005b71274d RCX: 00007f9d3e257f10
[   71.574810] RDX: 0000000000000000 RSI: 00007fff6f8933e0 RDI: 0000000000000003
[   71.582770] RBP: 00007fff6f8933e0 R08: 000000000000ffff R09: 0000000000000003
[   71.590729] R10: 00007fff6f892e20 R11: 0000000000000246 R12: 0000000000000000
[   71.598689] R13: 0000000000662ee0 R14: 0000000000000000 R15: 0000000000000000
[   71.606651] Modules linked in: sch_cbq cls_tcindex sch_dsmark xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_coni
[   71.685425]  libahci i2c_algo_bit i2c_core i40e libata dca mdio megaraid_sas dm_mirror dm_region_hash dm_log dm_mod
[   71.697075] CR2: 0000000000000004
[   71.700792] ---[ end trace f604eb1acacd978b ]---

Reproducer:
tc qdisc add dev lo handle 1:0 root dsmark indices 64 set_tc_index
tc filter add dev lo parent 1:0 protocol ip prio 1 tcindex mask 0xfc shift 2
tc qdisc add dev lo parent 1:0 handle 2:0 cbq bandwidth 10Mbit cell 8 avpkt 1000 mpu 64
tc class add dev lo parent 2:0 classid 2:1 cbq bandwidth 10Mbit rate 1500Kbit avpkt 1000 prio 1 bounded isolated allot 1514 weight 1 maxburst 10
tc filter add dev lo parent 2:0 protocol ip prio 1 handle 0x2e tcindex classid 2:1 pass_on
tc qdisc add dev lo parent 2:1 pfifo limit 5
tc qdisc del dev lo root

This is because in tcindex_set_parms, when there is no old_r, we set new
exts to cr.exts. And we didn't set it to filter when r == &new_filter_result.

Then in tcindex_delete() -> tcf_exts_get_net(), we will get NULL pointer
dereference as we didn't init exts.

Fix it by moving tcf_exts_change() after "if (old_r && old_r != r)" check.
Then we don't need "cr" as there is no errout after that.

Fixes: bf63ac73b3 ("net_sched: fix an oops in tcindex filter")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Cong Wang
62209d1f27 vsock: split dwork to avoid reinitializations 
[ Upstream commit 455f05ecd2 ]

syzbot reported that we reinitialize an active delayed
work in vsock_stream_connect():

	ODEBUG: init active (active state 0) object type: timer_list hint:
	delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:1414
	WARNING: CPU: 1 PID: 11518 at lib/debugobjects.c:329
	debug_print_object+0x16a/0x210 lib/debugobjects.c:326

The pattern is apparently wrong, we should only initialize
the dealyed work once and could repeatly schedule it. So we
have to move out the initializations to allocation side.
And to avoid confusion, we can split the shared dwork
into two, instead of re-using the same one.

Fixes: d021c34405 ("VSOCK: Introduce VM Sockets")
Reported-by: <syzbot+8a9b1bd330476a4f3db6@syzkaller.appspotmail.com>
Cc: Andy king <acking@vmware.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Jorgen Hansen <jhansen@vmware.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Hangbin Liu
0adfdb9af8 net_sched: Fix missing res info when create new tc_index filter 
[ Upstream commit 008369dcc5 ]

Li Shuang reported the following warn:

[  733.484610] WARNING: CPU: 6 PID: 21123 at net/sched/sch_cbq.c:1418 cbq_destroy_class+0x5d/0x70 [sch_cbq]
[  733.495190] Modules linked in: sch_cbq cls_tcindex sch_dsmark rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat l
[  733.574155]  syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm igb ixgbe ahci libahci i2c_algo_bit libata i40e i2c_core dca mdio megaraid_sas dm_mirror dm_region_hash dm_log dm_mod
[  733.592500] CPU: 6 PID: 21123 Comm: tc Not tainted 4.18.0-rc8.latest+ #131
[  733.600169] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.1.5 04/11/2016
[  733.608518] RIP: 0010:cbq_destroy_class+0x5d/0x70 [sch_cbq]
[  733.614734] Code: e7 d9 d2 48 8b 7b 48 e8 61 05 da d2 48 8d bb f8 00 00 00 e8 75 ae d5 d2 48 39 eb 74 0a 48 89 df 5b 5d e9 16 6c 94 d2 5b 5d c3 <0f> 0b eb b6 0f 1f 44 00 00 66 2e 0f 1f 84
[  733.635798] RSP: 0018:ffffbfbb066bb9d8 EFLAGS: 00010202
[  733.641627] RAX: 0000000000000001 RBX: ffff9cdd17392800 RCX: 000000008010000f
[  733.649588] RDX: ffff9cdd1df547e0 RSI: ffff9cdd17392800 RDI: ffff9cdd0f84c800
[  733.657547] RBP: ffff9cdd0f84c800 R08: 0000000000000001 R09: 0000000000000000
[  733.665508] R10: ffff9cdd0f84d000 R11: 0000000000000001 R12: 0000000000000001
[  733.673469] R13: 0000000000000000 R14: 0000000000000001 R15: ffff9cdd17392200
[  733.681430] FS:  00007f911890a740(0000) GS:ffff9cdd1f8c0000(0000) knlGS:0000000000000000
[  733.690456] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  733.696864] CR2: 0000000000b5544c CR3: 0000000859374002 CR4: 00000000001606e0
[  733.704826] Call Trace:
[  733.707554]  cbq_destroy+0xa1/0xd0 [sch_cbq]
[  733.712318]  qdisc_destroy+0x62/0x130
[  733.716401]  dsmark_destroy+0x2a/0x70 [sch_dsmark]
[  733.721745]  qdisc_destroy+0x62/0x130
[  733.725829]  qdisc_graft+0x3ba/0x470
[  733.729817]  tc_get_qdisc+0x2a6/0x2c0
[  733.733901]  ? cred_has_capability+0x7d/0x130
[  733.738761]  rtnetlink_rcv_msg+0x263/0x2d0
[  733.743330]  ? rtnl_calcit.isra.30+0x110/0x110
[  733.748287]  netlink_rcv_skb+0x4d/0x130
[  733.752576]  netlink_unicast+0x1a3/0x250
[  733.756949]  netlink_sendmsg+0x2ae/0x3a0
[  733.761324]  sock_sendmsg+0x36/0x40
[  733.765213]  ___sys_sendmsg+0x26f/0x2d0
[  733.769493]  ? handle_pte_fault+0x586/0xdf0
[  733.774158]  ? __handle_mm_fault+0x389/0x500
[  733.778919]  ? __sys_sendmsg+0x5e/0xa0
[  733.783099]  __sys_sendmsg+0x5e/0xa0
[  733.787087]  do_syscall_64+0x5b/0x180
[  733.791171]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  733.796805] RIP: 0033:0x7f9117f23f10
[  733.800791] Code: c3 48 8b 05 82 6f 2c 00 f7 db 64 89 18 48 83 cb ff eb dd 0f 1f 80 00 00 00 00 83 3d 8d d0 2c 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8
[  733.821873] RSP: 002b:00007ffe96818398 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  733.830319] RAX: ffffffffffffffda RBX: 000000005b71244c RCX: 00007f9117f23f10
[  733.838280] RDX: 0000000000000000 RSI: 00007ffe968183e0 RDI: 0000000000000003
[  733.846241] RBP: 00007ffe968183e0 R08: 000000000000ffff R09: 0000000000000003
[  733.854202] R10: 00007ffe96817e20 R11: 0000000000000246 R12: 0000000000000000
[  733.862161] R13: 0000000000662ee0 R14: 0000000000000000 R15: 0000000000000000
[  733.870121] ---[ end trace 28edd4aad712ddca ]---

This is because we didn't update f->result.res when create new filter. Then in
tcindex_delete() -> tcf_unbind_filter(), we will failed to find out the res
and unbind filter, which will trigger the WARN_ON() in cbq_destroy_class().

Fix it by updating f->result.res when create new filter.

Fixes: 6e0565697a ("net_sched: fix another crash in cls_tcindex")
Reported-by: Li Shuang <shuali@redhat.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Cong Wang
813fb06fe6 llc: use refcount_inc_not_zero() for llc_sap_find() 
[ Upstream commit 0dcb82254d ]

llc_sap_put() decreases the refcnt before deleting sap
from the global list. Therefore, there is a chance
llc_sap_find() could find a sap with zero refcnt
in this global list.

Close this race condition by checking if refcnt is zero
or not in llc_sap_find(), if it is zero then it is being
removed so we can just treat it as gone.

Reported-by: <syzbot+278893f3f7803871f7ce@syzkaller.appspotmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Wei Wang
4aef9b0fff l2tp: use sk_dst_check() to avoid race on sk->sk_dst_cache 
[ Upstream commit 6d37fa49da ]

In l2tp code, if it is a L2TP_UDP_ENCAP tunnel, tunnel->sk points to a
UDP socket. User could call sendmsg() on both this tunnel and the UDP
socket itself concurrently. As l2tp_xmit_skb() holds socket lock and call
__sk_dst_check() to refresh sk->sk_dst_cache, while udpv6_sendmsg() is
lockless and call sk_dst_check() to refresh sk->sk_dst_cache, there
could be a race and cause the dst cache to be freed multiple times.
So we fix l2tp side code to always call sk_dst_check() to garantee
xchg() is called when refreshing sk->sk_dst_cache to avoid race
conditions.

Syzkaller reported stack trace:
BUG: KASAN: use-after-free in atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
BUG: KASAN: use-after-free in atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
BUG: KASAN: use-after-free in atomic_add_unless include/linux/atomic.h:597 [inline]
BUG: KASAN: use-after-free in dst_hold_safe include/net/dst.h:308 [inline]
BUG: KASAN: use-after-free in ip6_hold_safe+0xe6/0x670 net/ipv6/route.c:1029
Read of size 4 at addr ffff8801aea9a880 by task syz-executor129/4829

CPU: 0 PID: 4829 Comm: syz-executor129 Not tainted 4.18.0-rc7-next-20180802+ #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 kasan_check_read+0x11/0x20 mm/kasan/kasan.c:272
 atomic_read include/asm-generic/atomic-instrumented.h:21 [inline]
 atomic_fetch_add_unless include/linux/atomic.h:575 [inline]
 atomic_add_unless include/linux/atomic.h:597 [inline]
 dst_hold_safe include/net/dst.h:308 [inline]
 ip6_hold_safe+0xe6/0x670 net/ipv6/route.c:1029
 rt6_get_pcpu_route net/ipv6/route.c:1249 [inline]
 ip6_pol_route+0x354/0xd20 net/ipv6/route.c:1922
 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2098
 fib6_rule_lookup+0x283/0x890 net/ipv6/fib6_rules.c:122
 ip6_route_output_flags+0x2c5/0x350 net/ipv6/route.c:2126
 ip6_dst_lookup_tail+0x1278/0x1da0 net/ipv6/ip6_output.c:978
 ip6_dst_lookup_flow+0xc8/0x270 net/ipv6/ip6_output.c:1079
 ip6_sk_dst_lookup_flow+0x5ed/0xc50 net/ipv6/ip6_output.c:1117
 udpv6_sendmsg+0x2163/0x36b0 net/ipv6/udp.c:1354
 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 ___sys_sendmsg+0x51d/0x930 net/socket.c:2115
 __sys_sendmmsg+0x240/0x6f0 net/socket.c:2210
 __do_sys_sendmmsg net/socket.c:2239 [inline]
 __se_sys_sendmmsg net/socket.c:2236 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2236
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446a29
Code: e8 ac b8 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f4de5532db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 0000000000446a29
RDX: 00000000000000b8 RSI: 0000000020001b00 RDI: 0000000000000003
RBP: 00000000006dcc30 R08: 00007f4de5533700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc3c
R13: 00007ffe2b830fdf R14: 00007f4de55339c0 R15: 0000000000000001

Fixes: 71b1391a41 ("l2tp: ensure sk->dst is still valid")
Reported-by: syzbot+05f840f3b04f211bad55@syzkaller.appspotmail.com
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Guillaume Nault <g.nault@alphalink.fr>
Cc: David Ahern <dsahern@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Alexey Kodanev
f35e16c597 dccp: fix undefined behavior with 'cwnd' shift in ccid2_cwnd_restart() 
[ Upstream commit 61ef4b07fc ]

The shift of 'cwnd' with '(now - hc->tx_lsndtime) / hc->tx_rto' value
can lead to undefined behavior [1].

In order to fix this use a gradual shift of the window with a 'while'
loop, similar to what tcp_cwnd_restart() is doing.

When comparing delta and RTO there is a minor difference between TCP
and DCCP, the last one also invokes dccp_cwnd_restart() and reduces
'cwnd' if delta equals RTO. That case is preserved in this change.

[1]:
[40850.963623] UBSAN: Undefined behaviour in net/dccp/ccids/ccid2.c:237:7
[40851.043858] shift exponent 67 is too large for 32-bit type 'unsigned int'
[40851.127163] CPU: 3 PID: 15940 Comm: netstress Tainted: G        W   E     4.18.0-rc7.x86_64 #1
...
[40851.377176] Call Trace:
[40851.408503]  dump_stack+0xf1/0x17b
[40851.451331]  ? show_regs_print_info+0x5/0x5
[40851.503555]  ubsan_epilogue+0x9/0x7c
[40851.548363]  __ubsan_handle_shift_out_of_bounds+0x25b/0x2b4
[40851.617109]  ? __ubsan_handle_load_invalid_value+0x18f/0x18f
[40851.686796]  ? xfrm4_output_finish+0x80/0x80
[40851.739827]  ? lock_downgrade+0x6d0/0x6d0
[40851.789744]  ? xfrm4_prepare_output+0x160/0x160
[40851.845912]  ? ip_queue_xmit+0x810/0x1db0
[40851.895845]  ? ccid2_hc_tx_packet_sent+0xd36/0x10a0 [dccp]
[40851.963530]  ccid2_hc_tx_packet_sent+0xd36/0x10a0 [dccp]
[40852.029063]  dccp_xmit_packet+0x1d3/0x720 [dccp]
[40852.086254]  dccp_write_xmit+0x116/0x1d0 [dccp]
[40852.142412]  dccp_sendmsg+0x428/0xb20 [dccp]
[40852.195454]  ? inet_dccp_listen+0x200/0x200 [dccp]
[40852.254833]  ? sched_clock+0x5/0x10
[40852.298508]  ? sched_clock+0x5/0x10
[40852.342194]  ? inet_create+0xdf0/0xdf0
[40852.388988]  sock_sendmsg+0xd9/0x160
...

Fixes: 113ced1f52 ("dccp ccid-2: Perform congestion-window validation")
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-22 07:48:35 +02:00
Greg Kroah-Hartman
5541782ce2 Merge 4.4.150 into android-4.4 
Changes in 4.4.150
	x86/speculation/l1tf: Exempt zeroed PTEs from inversion
	Linux 4.4.150

Change-Id: I2dfd6e160998ae2f55f3b7621df62e96a4511f7c
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2018-08-18 11:35:52 +02:00
Greg Kroah-Hartman
7dc18ebc31 Linux 4.4.150 2018-08-18 10:45:38 +02:00
Sean Christopherson
4cdedeefa3 x86/speculation/l1tf: Exempt zeroed PTEs from inversion 
commit f19f5c49bb upstream.

It turns out that we should *not* invert all not-present mappings,
because the all zeroes case is obviously special.

clear_page() does not undergo the XOR logic to invert the address bits,
i.e. PTE, PMD and PUD entries that have not been individually written
will have val=0 and so will trigger __pte_needs_invert(). As a result,
{pte,pmd,pud}_pfn() will return the wrong PFN value, i.e. all ones
(adjusted by the max PFN mask) instead of zero. A zeroed entry is ok
because the page at physical address 0 is reserved early in boot
specifically to mitigate L1TF, so explicitly exempt them from the
inversion when reading the PFN.

Manifested as an unexpected mprotect(..., PROT_NONE) failure when called
on a VMA that has VM_PFNMAP and was mmap'd to as something other than
PROT_NONE but never used. mprotect() sends the PROT_NONE request down
prot_none_walk(), which walks the PTEs to check the PFNs.
prot_none_pte_entry() gets the bogus PFN from pte_pfn() and returns
-EACCES because it thinks mprotect() is trying to adjust a high MMIO
address.

[ This is a very modified version of Sean's original patch, but all
  credit goes to Sean for doing this and also pointing out that
  sometimes the __pte_needs_invert() function only gets the protection
  bits, not the full eventual pte.  But zero remains special even in
  just protection bits, so that's ok.   - Linus ]

Fixes: f22cc87f6c ("x86/speculation/l1tf: Invert all not present mappings")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-18 10:45:38 +02:00
Greg Kroah-Hartman
f76bdbdd51 Merge 4.4.149 into android-4.4 
Changes in 4.4.149
	x86/mm: Disable ioremap free page handling on x86-PAE
	tcp: Fix missing range_truesize enlargement in the backport
	kasan: don't emit builtin calls when sanitization is off
	i2c: ismt: fix wrong device address when unmap the data buffer
	kbuild: verify that $DEPMOD is installed
	crypto: vmac - require a block cipher with 128-bit block size
	crypto: vmac - separate tfm and request context
	crypto: blkcipher - fix crash flushing dcache in error path
	crypto: ablkcipher - fix crash flushing dcache in error path
	ASoC: Intel: cht_bsw_max98090_ti: Fix jack initialization
	Bluetooth: hidp: buffer overflow in hidp_process_report
	ioremap: Update pgtable free interfaces with addr
	x86/mm: Add TLB purge to free pmd/pte page interfaces
	Linux 4.4.149

Change-Id: I1e23095dd229992359341bda5c05e9b5b59fec45
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
 2018-08-17 21:25:15 +02:00
Greg Kroah-Hartman
45cf1802a1 Linux 4.4.149 2018-08-17 20:56:45 +02:00
Toshi Kani
5b9b4a8cca x86/mm: Add TLB purge to free pmd/pte page interfaces 
commit 5e0fb5df2e upstream.

ioremap() calls pud_free_pmd_page() / pmd_free_pte_page() when it creates
a pud / pmd map.  The following preconditions are met at their entry.
 - All pte entries for a target pud/pmd address range have been cleared.
 - System-wide TLB purges have been peformed for a target pud/pmd address
   range.

The preconditions assure that there is no stale TLB entry for the range.
Speculation may not cache TLB entries since it requires all levels of page
entries, including ptes, to have P & A-bits set for an associated address.
However, speculation may cache pud/pmd entries (paging-structure caches)
when they have P-bit set.

Add a system-wide TLB purge (INVLPG) to a single page after clearing
pud/pmd entry's P-bit.

SDM 4.10.4.1, Operation that Invalidate TLBs and Paging-Structure Caches,
states that:
  INVLPG invalidates all paging-structure caches associated with the
  current PCID regardless of the liner addresses to which they correspond.

Fixes: 28ee90fe60 ("x86/mm: implement free pmd/pte page interfaces")
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: mhocko@suse.com
Cc: akpm@linux-foundation.org
Cc: hpa@zytor.com
Cc: cpandya@codeaurora.org
Cc: linux-mm@kvack.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Joerg Roedel <joro@8bytes.org>
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20180627141348.21777-4-toshi.kani@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Chintan Pandya
29f475cbff ioremap: Update pgtable free interfaces with addr 
commit 785a19f9d1 upstream.

The following kernel panic was observed on ARM64 platform due to a stale
TLB entry.

 1. ioremap with 4K size, a valid pte page table is set.
 2. iounmap it, its pte entry is set to 0.
 3. ioremap the same address with 2M size, update its pmd entry with
    a new value.
 4. CPU may hit an exception because the old pmd entry is still in TLB,
    which leads to a kernel panic.

Commit b6bdb7517c ("mm/vmalloc: add interfaces to free unmapped page
table") has addressed this panic by falling to pte mappings in the above
case on ARM64.

To support pmd mappings in all cases, TLB purge needs to be performed
in this case on ARM64.

Add a new arg, 'addr', to pud_free_pmd_page() and pmd_free_pte_page()
so that TLB purge can be added later in seprate patches.

[toshi.kani@hpe.com: merge changes, rewrite patch description]
Fixes: 28ee90fe60 ("x86/mm: implement free pmd/pte page interfaces")
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: mhocko@suse.com
Cc: akpm@linux-foundation.org
Cc: hpa@zytor.com
Cc: linux-mm@kvack.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20180627141348.21777-3-toshi.kani@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Mark Salyzyn
17c1e0b1f6 Bluetooth: hidp: buffer overflow in hidp_process_report 
commit 7992c18810 upstream.

CVE-2018-9363

The buffer length is unsigned at all layers, but gets cast to int and
checked in hidp_process_report and can lead to a buffer overflow.
Switch len parameter to unsigned int to resolve issue.

This affects 3.18 and newer kernels.

Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Fixes: a4b1b5877b ("HID: Bluetooth: hidp: make sure input buffers are big enough")
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-bluetooth@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: security@kernel.org
Cc: kernel-team@android.com
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Thierry Escande
59e68641ad ASoC: Intel: cht_bsw_max98090_ti: Fix jack initialization 
commit 3bbda5a386 upstream.

If the ts3a227e audio accessory detection hardware is present and its
driver probed, the jack needs to be created before enabling jack
detection in the ts3a227e driver. With this patch, the jack is
instantiated in the max98090 headset init function if the ts3a227e is
present. This fixes a null pointer dereference as the jack detection
enabling function in the ts3a driver was called before the jack is
created.

[minor correction to keep error handling on jack creation the same
as before by Pierre Bossart]

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Eric Biggers
930787c9cd crypto: ablkcipher - fix crash flushing dcache in error path 
commit 318abdfbe7 upstream.

Like the skcipher_walk and blkcipher_walk cases:

scatterwalk_done() is only meant to be called after a nonzero number of
bytes have been processed, since scatterwalk_pagedone() will flush the
dcache of the *previous* page.  But in the error case of
ablkcipher_walk_done(), e.g. if the input wasn't an integer number of
blocks, scatterwalk_done() was actually called after advancing 0 bytes.
This caused a crash ("BUG: unable to handle kernel paging request")
during '!PageSlab(page)' on architectures like arm and arm64 that define
ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE, provided that the input was
page-aligned as in that case walk->offset == 0.

Fix it by reorganizing ablkcipher_walk_done() to skip the
scatterwalk_advance() and scatterwalk_done() if an error has occurred.

Reported-by: Liu Chao <liuchao741@huawei.com>
Fixes: bf06099db1 ("crypto: skcipher - Add ablkcipher_walk interfaces")
Cc: <stable@vger.kernel.org> # v2.6.35+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Eric Biggers
a55a251282 crypto: blkcipher - fix crash flushing dcache in error path 
commit 0868def3e4 upstream.

Like the skcipher_walk case:

scatterwalk_done() is only meant to be called after a nonzero number of
bytes have been processed, since scatterwalk_pagedone() will flush the
dcache of the *previous* page.  But in the error case of
blkcipher_walk_done(), e.g. if the input wasn't an integer number of
blocks, scatterwalk_done() was actually called after advancing 0 bytes.
This caused a crash ("BUG: unable to handle kernel paging request")
during '!PageSlab(page)' on architectures like arm and arm64 that define
ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE, provided that the input was
page-aligned as in that case walk->offset == 0.

Fix it by reorganizing blkcipher_walk_done() to skip the
scatterwalk_advance() and scatterwalk_done() if an error has occurred.

This bug was found by syzkaller fuzzing.

Reproducer, assuming ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE:

	#include <linux/if_alg.h>
	#include <sys/socket.h>
	#include <unistd.h>

	int main()
	{
		struct sockaddr_alg addr = {
			.salg_type = "skcipher",
			.salg_name = "ecb(aes-generic)",
		};
		char buffer[4096] __attribute__((aligned(4096))) = { 0 };
		int fd;

		fd = socket(AF_ALG, SOCK_SEQPACKET, 0);
		bind(fd, (void *)&addr, sizeof(addr));
		setsockopt(fd, SOL_ALG, ALG_SET_KEY, buffer, 16);
		fd = accept(fd, NULL, NULL);
		write(fd, buffer, 15);
		read(fd, buffer, 15);
	}

Reported-by: Liu Chao <liuchao741@huawei.com>
Fixes: 5cde0af2a9 ("[CRYPTO] cipher: Added block cipher type")
Cc: <stable@vger.kernel.org> # v2.6.19+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Eric Biggers
335e988310 crypto: vmac - separate tfm and request context 
commit bb29648102 upstream.

syzbot reported a crash in vmac_final() when multiple threads
concurrently use the same "vmac(aes)" transform through AF_ALG.  The bug
is pretty fundamental: the VMAC template doesn't separate per-request
state from per-tfm (per-key) state like the other hash algorithms do,
but rather stores it all in the tfm context.  That's wrong.

Also, vmac_final() incorrectly zeroes most of the state including the
derived keys and cached pseudorandom pad.  Therefore, only the first
VMAC invocation with a given key calculates the correct digest.

Fix these bugs by splitting the per-tfm state from the per-request state
and using the proper init/update/final sequencing for requests.

Reproducer for the crash:

    #include <linux/if_alg.h>
    #include <sys/socket.h>
    #include <unistd.h>

    int main()
    {
            int fd;
            struct sockaddr_alg addr = {
                    .salg_type = "hash",
                    .salg_name = "vmac(aes)",
            };
            char buf[256] = { 0 };

            fd = socket(AF_ALG, SOCK_SEQPACKET, 0);
            bind(fd, (void *)&addr, sizeof(addr));
            setsockopt(fd, SOL_ALG, ALG_SET_KEY, buf, 16);
            fork();
            fd = accept(fd, NULL, NULL);
            for (;;)
                    write(fd, buf, 256);
    }

The immediate cause of the crash is that vmac_ctx_t.partial_size exceeds
VMAC_NHBYTES, causing vmac_final() to memset() a negative length.

Reported-by: syzbot+264bca3a6e8d645550d3@syzkaller.appspotmail.com
Fixes: f1939f7c56 ("crypto: vmac - New hash algorithm for intel_txt support")
Cc: <stable@vger.kernel.org> # v2.6.32+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Eric Biggers
9054a54766 crypto: vmac - require a block cipher with 128-bit block size 
commit 73bf20ef3d upstream.

The VMAC template assumes the block cipher has a 128-bit block size, but
it failed to check for that.  Thus it was possible to instantiate it
using a 64-bit block size cipher, e.g. "vmac(cast5)", causing
uninitialized memory to be used.

Add the needed check when instantiating the template.

Fixes: f1939f7c56 ("crypto: vmac - New hash algorithm for intel_txt support")
Cc: <stable@vger.kernel.org> # v2.6.32+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Randy Dunlap
293cce718b kbuild: verify that $DEPMOD is installed 
commit 934193a654 upstream.

Verify that 'depmod' ($DEPMOD) is installed.
This is a partial revert of commit 620c231c7a
("kbuild: do not check for ancient modutils tools").

Also update Documentation/process/changes.rst to refer to
kmod instead of module-init-tools.

Fixes kernel bugzilla #198965:
https://bugzilla.kernel.org/show_bug.cgi?id=198965

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Lucas De Marchi <lucas.de.marchi@gmail.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Chih-Wei Huang <cwhuang@linux.org.tw>
Cc: stable@vger.kernel.org # any kernel since 2012
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:45 +02:00
Liwei Song
3abc229cfc i2c: ismt: fix wrong device address when unmap the data buffer 
commit 17e83549e1 upstream.

Fix the following kernel bug:

kernel BUG at drivers/iommu/intel-iommu.c:3260!
invalid opcode: 0000 [#5] PREEMPT SMP
Hardware name: Intel Corp. Harcuvar/Server, BIOS HAVLCRB0.X64.0013.D39.1608311820 08/31/2016
task: ffff880175389950 ti: ffff880176bec000 task.ti: ffff880176bec000
RIP: 0010:[<ffffffff8150a83b>]  [<ffffffff8150a83b>] intel_unmap+0x25b/0x260
RSP: 0018:ffff880176bef5e8  EFLAGS: 00010296
RAX: 0000000000000024 RBX: ffff8800773c7c88 RCX: 000000000000ce04
RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000009
RBP: ffff880176bef638 R08: 0000000000000010 R09: 0000000000000004
R10: ffff880175389c78 R11: 0000000000000a4f R12: ffff8800773c7868
R13: 00000000ffffac88 R14: ffff8800773c7818 R15: 0000000000000001
FS:  00007fef21258700(0000) GS:ffff88017b5c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000066d6d8 CR3: 000000007118c000 CR4: 00000000003406e0
Stack:
 00000000ffffac88 ffffffff8199867f ffff880176bef5f8 ffff880100000030
 ffff880176bef668 ffff8800773c7c88 ffff880178288098 ffff8800772c0010
 ffff8800773c7818 0000000000000001 ffff880176bef648 ffffffff8150a86e
Call Trace:
 [<ffffffff8199867f>] ? printk+0x46/0x48
 [<ffffffff8150a86e>] intel_unmap_page+0xe/0x10
 [<ffffffffa039d99b>] ismt_access+0x27b/0x8fa [i2c_ismt]
 [<ffffffff81554420>] ? __pm_runtime_suspend+0xa0/0xa0
 [<ffffffff815544a0>] ? pm_suspend_timer_fn+0x80/0x80
 [<ffffffff81554420>] ? __pm_runtime_suspend+0xa0/0xa0
 [<ffffffff815544a0>] ? pm_suspend_timer_fn+0x80/0x80
 [<ffffffff8143dfd0>] ? pci_bus_read_dev_vendor_id+0xf0/0xf0
 [<ffffffff8172b36c>] i2c_smbus_xfer+0xec/0x4b0
 [<ffffffff810aa4d5>] ? vprintk_emit+0x345/0x530
 [<ffffffffa038936b>] i2cdev_ioctl_smbus+0x12b/0x240 [i2c_dev]
 [<ffffffff810aa829>] ? vprintk_default+0x29/0x40
 [<ffffffffa0389b33>] i2cdev_ioctl+0x63/0x1ec [i2c_dev]
 [<ffffffff811b04c8>] do_vfs_ioctl+0x328/0x5d0
 [<ffffffff8119d8ec>] ? vfs_write+0x11c/0x190
 [<ffffffff8109d449>] ? rt_up_read+0x19/0x20
 [<ffffffff811b07f1>] SyS_ioctl+0x81/0xa0
 [<ffffffff819a351b>] system_call_fastpath+0x16/0x6e

This happen When run "i2cdetect -y 0" detect SMBus iSMT adapter.

After finished I2C block read/write, when unmap the data buffer,
a wrong device address was pass to dma_unmap_single().

To fix this, give dma_unmap_single() the "dev" parameter, just like
what dma_map_single() does, then unmap can find the right devices.

Fixes: 13f35ac14c ("i2c: Adding support for Intel iSMT SMBus 2.0 host controller")
Signed-off-by: Liwei Song <liwei.song@windriver.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:44 +02:00
Andrey Konovalov
dcb852a7db kasan: don't emit builtin calls when sanitization is off 
commit 0e410e158e upstream.

With KASAN enabled the kernel has two different memset() functions, one
with KASAN checks (memset) and one without (__memset).  KASAN uses some
macro tricks to use the proper version where required.  For example
memset() calls in mm/slub.c are without KASAN checks, since they operate
on poisoned slab object metadata.

The issue is that clang emits memset() calls even when there is no
memset() in the source code.  They get linked with improper memset()
implementation and the kernel fails to boot due to a huge amount of KASAN
reports during early boot stages.

The solution is to add -fno-builtin flag for files with KASAN_SANITIZE :=
n marker.

Link: http://lkml.kernel.org/r/8ffecfffe04088c52c42b92739c2bd8a0bcb3f5e.1516384594.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[ Nick : Backported to 4.4 avoiding KUBSAN ]
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2018-08-17 20:56:44 +02:00
Takashi Iwai
42962538cd tcp: Fix missing range_truesize enlargement in the backport 
The 4.4.y stable backport dc6ae4dffd for the upstream commit
3d4bf93ac1 ("tcp: detect malicious patterns in
tcp_collapse_ofo_queue()") missed a line that enlarges the
range_truesize value, which broke the whole check.

Fixes: dc6ae4dffd ("tcp: detect malicious patterns in tcp_collapse_ofo_queue()")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Cc: Michal Kubecek <mkubecek@suse.cz>
 2018-08-17 20:56:44 +02:00