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John Johansen e0d2bf5a01 apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock 
commit 8c62ed27a1 upstream.

aa_xattrs_match() is unfortunately calling vfs_getxattr_alloc() from a
context protected by an rcu_read_lock. This can not be done as
vfs_getxattr_alloc() may sleep regardles of the gfp_t value being
passed to it.

Fix this by breaking the rcu_read_lock on the policy search when the
xattr match feature is requested and restarting the search if a policy
changes occur.

Fixes: 8e51f9087f ("apparmor: Add support for attaching profiles via xattr, presence and value")
Reported-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-09 10:20:00 +01:00
arch
riscv: ftrace: correct the condition logic in function graph tracer
2020-01-09 10:19:59 +01:00
block
compat_ioctl: block: handle BLKGETZONESZ/BLKGETNRZONES
2020-01-09 10:19:58 +01:00
certs
PKCS#7: Refactor verify_pkcs7_signature()
2019-08-05 18:40:18 -04:00
crypto
KEYS: asymmetric: return ENOMEM if akcipher_request_alloc() fails
2019-12-31 16:46:07 +01:00
Documentation
dt-bindings: Improve validation build error handling
2020-01-04 19:18:11 +01:00
drivers
clocksource: riscv: add notrace to riscv_sched_clock
2020-01-09 10:19:59 +01:00
fs
io_uring: use current task creds instead of allocating a new one
2020-01-09 10:20:00 +01:00
include
libata: Fix retrieving of active qcs
2020-01-09 10:19:59 +01:00
init
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
ipc
ipc/sem.c: convert to use built-in RCU list checking
2019-09-25 17:51:41 -07:00
kernel
tracing: Fix endianness bug in histogram trigger
2020-01-09 10:20:00 +01:00
lib
ubsan, x86: Annotate and allow __ubsan_handle_shift_out_of_bounds() in uaccess regions
2019-12-31 16:44:25 +01:00
LICENSES
LICENSES: Rename other to deprecated
2019-05-03 06:34:32 -06:00
mm
mm/gup: fix memory leak in __gup_benchmark_ioctl
2020-01-09 10:20:00 +01:00
net
netfilter: nft_tproxy: Fix port selector on Big Endian
2020-01-09 10:19:54 +01:00
samples
samples/trace_printk: Wait for IRQ work to finish
2020-01-09 10:20:00 +01:00
scripts
gcc-plugins: make it possible to disable CONFIG_GCC_PLUGINS again
2020-01-09 10:19:57 +01:00
security
apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock
2020-01-09 10:20:00 +01:00
sound
ALSA: hda/realtek - Add headset Mic no shutup for ALC283
2020-01-09 10:19:55 +01:00
tools
rseq/selftests: Fix: Namespace gettid() for compatibility with glibc 2.30
2020-01-09 10:19:59 +01:00
usr
kbuild: update compile-test header list for v5.4-rc2
2019-10-05 15:29:49 +09:00
virt
KVM: arm/arm64: Properly handle faulting of device mappings
2019-12-31 16:46:24 +01:00
.clang-format
clang-format: Update with the latest for_each macro list
2019-08-31 10:00:51 +02:00
.cocciconfig
scripts: add Linux .cocciconfig for coccinelle
2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: set git diff driver for C source code files
2016-10-07 18:46:30 -07:00
.gitignore
Merge tag 'modules-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
2019-09-22 10:34:46 -07:00
.mailmap
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2019-11-10 13:41:59 -08:00
COPYING
COPYING: use the new text with points to the license files
2018-03-23 12:41:45 -06:00
CREDITS
MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer
2019-10-10 08:12:51 -07:00
Kbuild
kbuild: do not descend to ./Kbuild when cleaning
2019-08-21 21:03:58 +09:00
Kconfig
docs: kbuild: convert docs to ReST and rename to *.rst
2019-06-14 14:21:21 -06:00
MAINTAINERS
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-11-22 14:28:14 -08:00
Makefile
Linux 5.4.8
2020-01-04 19:19:19 +01:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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