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0d34ce8aa78e38affbb501690bcabec4df88620e
linux/kernel
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Qais Yousef ab6e10de9d ANDROID: cgroup/cpuset: Fix suspicous RCU usage WARNING 
task_cs() is called from cpuset_cpus_allowed_fallback() without
holding the read_rcu_lock() causing the below splat.

Fix by holding the rcu_read_lock().

[    0.090199] =============================
[    0.090399] WARNING: suspicious RCU usage
[    0.090600] 5.10.19-00939-gc3bf09a68b63-dirty #368 Not tainted
[    0.090837] -----------------------------
[    0.091000] include/linux/cgroup.h:494 suspicious rcu_dereference_check() usage!
[    0.091246]
[    0.091246] other info that might help us debug this:
[    0.091246]
[    0.091499]
[    0.091499] rcu_scheduler_active = 1, debug_locks = 1
[    0.091738] 4 locks held by swapper/0/1:
[    0.091902]  #0: ffff800014e3f510 (cpu_add_remove_lock){+.+.}-{3:3}, at: cpu_up+0x100/0x190
[    0.092726]  #1: ffff800014e3f6b0 (cpu_hotplug_lock){++++}-{0:0}, at: _cpu_up+0x4c/0x1c8
[    0.093540]  #2: ffff800014e47478 (smpboot_threads_lock){+.+.}-{3:3}, at: smpboot_create_threads+0x34/0xc0
[    0.094399]  #3: ffff0008001d0878 (&p->pi_lock){....}-{2:2}, at: try_to_wake_up+0x58/0x828
[    0.095199]
[    0.095199] stack backtrace:
[    0.095425] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.10.19-00939-gc3bf09a68b63-dirty #368
[    0.095670] Hardware name: Foundation-v8A (DT)
[    0.095834] Call trace:
[    0.096099]  dump_backtrace+0x0/0x1a8
[    0.096353]  show_stack+0x18/0x68
[    0.096571]  dump_stack+0xf8/0x168
[    0.096817]  lockdep_rcu_suspicious+0xe4/0xf8
[    0.097063]  cpuset_cpus_allowed_fallback+0x184/0x1f8
[    0.097299]  select_fallback_rq+0x24c/0x2c0
[    0.097526]  try_to_wake_up+0x1e4/0x828
[    0.097740]  wake_up_process+0x18/0x28
[    0.097999]  kthread_park+0x74/0xc8
[    0.098209]  __smpboot_create_thread.part.0+0x90/0x168
[    0.098486]  smpboot_create_threads+0x84/0xc0
[    0.098699]  cpuhp_invoke_callback+0xe8/0xe50
[    0.098947]  _cpu_up+0xe0/0x1c8
[    0.099126]  cpu_up+0x120/0x190
[    0.099399]  bringup_nonboot_cpus+0x94/0xd0
[    0.099659]  smp_init+0x30/0x8c
[    0.099873]  kernel_init_freeable+0x1d4/0x328
[    0.100099]  kernel_init+0x14/0x118
[    0.100339]  ret_from_fork+0x10/0x34

Bug: 178507149
Fixes: 210463b39c ("FROMLIST: cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1")
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Change-Id: Ib7688e7d0c37cbf119d806ce79157a467b9e35f6
2021-03-03 09:02:19 +00:00
..
bpf
bpf: Fix truncation handling for mod32 dst reg wrt zero
2021-02-26 10:12:59 +01:00
cgroup
ANDROID: cgroup/cpuset: Fix suspicous RCU usage WARNING
2021-03-03 09:02:19 +00:00
configs
compiler: remove CONFIG_OPTIMIZE_INLINING entirely
2020-04-07 10:43:42 -07:00
debug
kdb: Fix pager search for multi-line strings
2020-10-01 14:44:08 +01:00
dma
FROMLIST: mm: cma: introduce gfp flag in cma_alloc instead of no_warn
2021-01-25 12:21:02 -08:00
entry
entry: Fix the incorrect ordering of lockdep and RCU check
2020-11-04 18:06:14 +01:00
events
Merge 5.10.6 into android12-5.10
2021-01-13 10:28:55 +01:00
gcov
gcov: add support for GCC 10.1
2020-09-11 09:33:54 -07:00
irq
UPSTREAM: irqdomain: Mark fwnodes when their irqdomain is added/removed
2021-02-25 15:16:39 -08:00
kcsan
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
livepatch
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
locking
Merge 5.10.14 into android12-5.10
2021-02-08 20:05:12 -08:00
power
UPSTREAM: PM: EM: Add a flag indicating units of power values in Energy Model
2021-03-02 17:34:28 -08:00
printk
UPSTREAM: printk: avoid prb_first_valid_seq() where possible
2021-02-25 13:16:22 +01:00
rcu
rcu-tasks: Move RCU-tasks initialization to before early_initcall()
2021-01-19 18:27:28 +01:00
sched
ANDROID: sched/rt: Only enable RT sync for SMP targets
2021-03-01 18:50:27 +00:00
time
ANDROID: timer: calc_index vendor hook adjustment
2021-02-26 19:23:02 +00:00
trace
Merge 5.10.17 into android12-5.10
2021-02-18 11:21:01 +01:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
acct.c
kernel: acct.c: fix some kernel-doc nits
2020-10-16 11:11:19 -07:00
async.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
audit_fsnotify.c
fsnotify: generalize handle_inode_event()
2020-12-30 11:54:18 +01:00
audit_tree.c
fsnotify: generalize handle_inode_event()
2020-12-30 11:54:18 +01:00
audit_watch.c
fsnotify: generalize handle_inode_event()
2020-12-30 11:54:18 +01:00
audit.c
audit: Remove redundant null check
2020-08-26 09:10:39 -04:00
audit.h
audit: change unnecessary globals into statics
2020-08-17 20:26:58 -04:00
auditfilter.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
auditsc.c
Merge tag 'audit-pr-20200803' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
2020-08-04 14:20:26 -07:00
backtracetest.c
treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
2020-07-30 11:15:58 -07:00
bounds.c
…
capability.c
LSM: Signal to SafeSetID when setting group IDs
2020-10-13 09:17:34 -07:00
cfi.c
ANDROID: cfi: switch to synchronize_rcu_expedited()
2021-02-16 18:09:38 +00:00
compat.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
configs.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
context_tracking.c
context_tracking: Ensure that the critical path cannot be instrumented
2020-06-11 15:14:36 +02:00
cpu_pm.c
notifier: Fix broken error handling pattern
2020-09-01 09:58:03 +02:00
cpu.c
ANDROID: cpuhp/aarch32: keep last 32bit cpu active
2021-02-18 13:11:30 +00:00
crash_core.c
kdump: append kernel build-id string to VMCOREINFO
2020-08-12 10:58:01 -07:00
crash_dump.c
crash_dump: Remove no longer used saved_max_pfn
2020-04-15 11:21:54 +02:00
cred.c
exec: Teach prepare_exec_creds how exec treats uids & gids
2020-05-20 14:44:21 -05:00
delayacct.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 25
2019-05-21 11:52:39 +02:00
dma.c
…
exec_domain.c
…
exit.c
kernel/io_uring: cancel io_uring before task works
2021-01-30 13:55:18 +01:00
extable.c
kernel/extable.c: use address-of operator on section symbols
2020-04-07 10:43:42 -07:00
fail_function.c
fail_function: Remove a redundant mutex unlock
2020-11-19 11:58:16 -08:00
fork.c
FROMLIST: mm: protect against PTE changes done by dup_mmap()
2021-01-22 18:02:09 +00:00
freezer.c
Revert "libata, freezer: avoid block device removal while system is frozen"
2019-10-06 09:11:37 -06:00
futex.c
Merge 5.10.12 into android12-5.10
2021-01-30 14:29:02 +01:00
gen_kheaders.sh
kbuild: add variables for compression tools
2020-06-06 23:42:01 +09:00
groups.c
LSM: Signal to SafeSetID when setting group IDs
2020-10-13 09:17:34 -07:00
hung_task.c
kernel/hung_task.c: make type annotations consistent
2020-11-02 12:14:19 -08:00
iomem.c
mm/nvdimm: add is_ioremap_addr and use that to check ioremap address
2019-07-12 11:05:40 -07:00
irq_work.c
ANDROID: Sched: Export scheduler symbols needed by vendor modules
2020-12-03 16:50:04 +00:00
jump_label.c
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
kallsyms.c
ANDROID: kallsyms: cfi: strip hashes from static functions
2021-01-14 16:31:46 +00:00
kcmp.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:46:24 +01:00
Kconfig.freezer
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
Kconfig.hz
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
Kconfig.locks
sched/rt, locking: Use CONFIG_PREEMPTION
2019-12-08 14:37:36 +01:00
Kconfig.preempt
sched/Kconfig: Fix spelling mistake in user-visible help text
2019-11-12 11:35:32 +01:00
kcov.c
kcov: make some symbols static
2020-08-12 10:58:02 -07:00
kexec_core.c
kernel: kexec: remove the lock operation of system_transition_mutex
2021-02-03 23:28:37 +01:00
kexec_elf.c
kexec_elf: support 32 bit ELF files
2019-09-06 23:58:44 +02:00
kexec_file.c
kernel/resource: move and rename IORESOURCE_MEM_DRIVER_MANAGED
2020-10-16 11:11:18 -07:00
kexec_internal.h
kexec: add machine_kexec_post_load()
2020-01-08 16:32:55 +00:00
kexec.c
LSM: Introduce kernel_post_load_data() hook
2020-10-05 13:37:03 +02:00
kheaders.c
kheaders: Move from proc to sysfs
2019-05-24 20:16:01 +02:00
kmod.c
kmod: remove redundant "be an" in the comment
2020-08-12 10:58:01 -07:00
kprobes.c
kretprobe: Avoid re-registration of the same kretprobe earlier
2021-02-10 09:29:16 +01:00
ksysfs.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 170
2019-05-30 11:26:39 -07:00
kthread.c
Merge 5.10.14 into android12-5.10
2021-02-08 20:05:12 -08:00
latencytop.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
Makefile
ANDROID: add support for Clang's Control Flow Integrity (CFI)
2021-01-14 16:28:57 +00:00
module_signature.c
MODSIGN: Export module signature definitions
2019-08-05 18:39:56 -04:00
module_signing.c
MODSIGN: Export module signature definitions
2019-08-05 18:39:56 -04:00
module-internal.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
module.c
ANDROID: modules: introduce the MODULE_SCMVERSION config
2021-02-23 16:42:21 -08:00
notifier.c
notifier: Fix broken error handling pattern
2020-09-01 09:58:03 +02:00
nsproxy.c
nsproxy: support CLONE_NEWTIME with setns()
2020-07-08 11:14:22 +02:00
padata.c
padata: fix possible padata_works_lock deadlock
2020-09-04 17:51:55 +10:00
panic.c
panic: don't dump stack twice on warn
2020-11-14 11:26:04 -08:00
params.c
params: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
pid_namespace.c
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
pid.c
Merge 5.10.6 into android12-5.10
2021-01-13 10:28:55 +01:00
profile.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
ptrace.c
ptrace: Set PF_SUPERPRIV when checking capability
2020-11-17 12:53:22 -08:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
Merge e28c0d7c92 ("Merge branch 'akpm' (patches from Andrew)") into android-mainline
2020-11-15 14:37:09 +01:00
regset.c
regset: kill ->get()
2020-07-27 14:31:12 -04:00
relay.c
kernel/relay.c: drop unneeded initialization
2020-10-16 11:11:22 -07:00
resource.c
kernel/resource: make iomem_resource implicit in release_mem_region_adjustable()
2020-10-16 11:11:18 -07:00
rseq.c
rseq: Reject unknown flags on rseq unregister
2019-12-25 10:41:20 +01:00
scftorture.c
scftorture: Add cond_resched() to test loop
2020-08-24 18:38:38 -07:00
scs.c
UPSTREAM: scs: switch to vmapped shadow stacks
2021-01-07 17:56:54 -08:00
seccomp.c
UPSTREAM: seccomp: Remove bogus __user annotations
2020-12-21 18:48:41 +00:00
signal.c
UPSTREAM: signal: define the SA_EXPOSE_TAGBITS bit in sa_flags
2021-01-22 10:05:52 -08:00
smp.c
ANDROID: fix 0-day build-break for non-GKI
2021-01-14 11:39:55 -08:00
smpboot.c
kthread: Extract KTHREAD_IS_PER_CPU
2021-02-07 15:37:17 +01:00
smpboot.h
…
softirq.c
ANDROID: softirq: Export irq_handler_exit tracepoint
2020-12-21 17:48:06 +00:00
stackleak.c
stackleak: let stack_erasing_sysctl take a kernel pointer buffer
2020-09-19 13:13:39 -07:00
stacktrace.c
stacktrace: Remove reliable argument from arch_stack_walk() callback
2020-09-18 14:24:16 +01:00
static_call.c
static_call: Fix return type of static_call_init
2020-10-02 21:18:25 +02:00
stop_machine.c
ANDROID: stop_machine: stop_one_cpu_async
2020-12-08 19:07:21 +00:00
sys_ni.c
mm/madvise: introduce process_madvise() syscall: an external memory hinting API
2020-10-18 09:27:10 -07:00
sys.c
Merge 'v5.10-rc1' into android-mainline
2020-10-29 06:32:38 +01:00
sysctl-test.c
kunit: allow kunit tests to be loaded as a module
2020-01-09 16:42:29 -07:00
sysctl.c
Merge 5.9-rc6 into android-mainline
2020-09-21 12:13:45 +02:00
task_work.c
task_work: cleanup notification modes
2020-10-17 15:05:30 -06:00
taskstats.c
taskstats: move specifying netlink policy back to ops
2020-10-02 19:11:12 -07:00
test_kprobes.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 25
2019-05-21 11:52:39 +02:00
torture.c
torture: Dump ftrace at shutdown only if requested
2020-06-29 12:01:45 -07:00
tracepoint.c
tracepoint: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
tsacct.c
tsacct: add 64-bit btime field
2019-12-18 18:07:31 +01:00
ucount.c
ucount: Make sure ucounts in /proc/sys/user don't regress again
2020-04-07 21:51:27 +02:00
uid16.c
…
uid16.h
…
umh.c
usermodehelper: reset umask to default before executing user process
2020-10-06 10:31:52 -07:00
up.c
smp/up: Make smp_call_function_single() match SMP semantics
2020-02-07 15:34:12 +01:00
user_namespace.c
kernel/: fix repeated words in comments
2020-10-16 11:11:19 -07:00
user-return-notifier.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
user.c
user.c: make uidhash_table static
2020-06-04 19:06:24 -07:00
usermode_driver.c
umd: Stop using split_argv
2020-07-07 11:58:59 -05:00
utsname_sysctl.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
utsname.c
nsproxy: add struct nsset
2020-05-09 13:57:12 +02:00
watch_queue.c
watch_queue: Limit the number of watches a user can hold
2020-08-17 09:39:18 -07:00
watchdog_hld.c
kernel/watchdog_hld.c: hard lockup message should end with a newline
2019-04-19 09:46:05 -07:00
watchdog.c
ANDROID: softlockup: add vendor hook for a softlockup task
2021-02-04 23:55:45 +00:00
workqueue_internal.h
sched/core, workqueues: Distangle worker accounting from rq lock
2019-04-16 16:55:15 +02:00
workqueue.c
Merge 5.10.14 into android12-5.10
2021-02-08 20:05:12 -08:00