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dee1e2b18cf5426eed985512ccc6636ec69dbdd6
android_kernel_xiaomi_sm8450/kernel
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Tejun Heo dee1e2b18c cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock 
[ Upstream commit 4f7e7236435ca0abe005c674ebd6892c6e83aeb3 ]

Bringing up a CPU may involve creating and destroying tasks which requires
read-locking threadgroup_rwsem, so threadgroup_rwsem nests inside
cpus_read_lock(). However, cpuset's ->attach(), which may be called with
thredagroup_rwsem write-locked, also wants to disable CPU hotplug and
acquires cpus_read_lock(), leading to a deadlock.

Fix it by guaranteeing that ->attach() is always called with CPU hotplug
disabled and removing cpus_read_lock() call from cpuset_attach().

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-and-tested-by: Imran Khan <imran.f.khan@oracle.com>
Reported-and-tested-by: Xuewen Yan <xuewen.yan@unisoc.com>
Fixes: 05c7b7a92cc8 ("cgroup/cpuset: Fix a race between cpuset_attach() and cpu hotplug")
Cc: stable@vger.kernel.org # v5.17+
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-09-15 11:32:04 +02:00
..
bpf
bpf, cgroup: Fix kernel BUG in purge_effective_progs
2022-09-08 11:11:36 +02:00
cgroup
cgroup: Fix threadgroup_rwsem <-> cpus_read_lock() deadlock
2022-09-15 11:32:04 +02:00
configs
compiler: remove CONFIG_OPTIMIZE_INLINING entirely
2020-04-07 10:43:42 -07:00
debug
lockdown: also lock down previous kgdb use
2022-05-30 09:33:22 +02:00
dma
dma-direct: don't over-decrypt memory
2022-06-22 14:13:20 +02:00
entry
KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest
2021-10-06 15:55:49 +02:00
events
perf/core: Fix data race between perf_event_set_output() and perf_mmap_close()
2022-07-29 17:19:11 +02:00
gcov
gcov: re-fix clang-11+ support
2021-04-14 08:41:58 +02:00
irq
genirq: GENERIC_IRQ_IPI depends on SMP
2022-08-21 15:15:28 +02:00
kcsan
kcsan: Fix debugfs initcall return type
2021-05-26 12:06:54 +02:00
livepatch
livepatch: Fix build failure on 32 bits processors
2022-04-08 14:40:15 +02:00
locking
locking/lockdep: Fix lockdep_init_map_*() confusion
2022-08-21 15:15:33 +02:00
power
PM: hibernate: defer device probing when resuming from hibernation
2022-08-21 15:15:31 +02:00
printk
printk: fix return value of printk.devkmsg __setup handler
2022-04-08 14:40:08 +02:00
rcu
rcu: Make TASKS_RUDE_RCU select IRQ_WORK
2022-06-09 10:20:51 +02:00
sched
sched/fair: Fix fault in reweight_entity
2022-08-21 15:16:26 +02:00
time
timekeeping: contribute wall clock to rng on time change
2022-08-21 15:16:20 +02:00
trace
ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead
2022-09-05 10:28:56 +02:00
.gitignore
kbuild: update config_data.gz only when the content of .config is changed
2021-05-11 14:47:37 +02:00
acct.c
kernel: acct.c: fix some kernel-doc nits
2020-10-16 11:11:19 -07:00
async.c
Revert "module, async: async_synchronize_full() on module init iff async is used"
2022-02-23 12:01:00 +01:00
audit_fsnotify.c
audit: fix potential double free on error path from fsnotify_add_inode_mark
2022-08-31 17:15:13 +02:00
audit_tree.c
audit: move put_tree() to avoid trim_trees refcount underflow and UAF
2021-09-03 10:09:31 +02:00
audit_watch.c
fsnotify: generalize handle_inode_event()
2020-12-30 11:54:18 +01:00
audit.c
audit: improve audit queue handling when "audit=1" on cmdline
2022-02-08 18:30:34 +01:00
audit.h
audit: log AUDIT_TIME_* records only from rules
2022-04-08 14:40:00 +02:00
auditfilter.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
auditsc.c
audit: log AUDIT_TIME_* records only from rules
2022-04-08 14:40:00 +02:00
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
compat.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
configs.c
…
context_tracking.c
context_tracking: Ensure that the critical path cannot be instrumented
2020-06-11 15:14:36 +02:00
cpu_pm.c
PM: cpu: Make notifier chain use a raw_spinlock_t
2021-09-15 09:50:40 +02:00
cpu.c
random: clear fast pool, crng, and batches in cpuhp bring up
2022-05-30 09:33:36 +02:00
crash_core.c
crash_core, vmcoreinfo: append 'SECTION_SIZE_BITS' to vmcoreinfo
2021-06-23 14:42:52 +02:00
crash_dump.c
crash_dump: Remove no longer used saved_max_pfn
2020-04-15 11:21:54 +02:00
cred.c
Revert "Add a reference to ucounts for each cred"
2021-09-08 08:49:00 +02:00
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
fix race between exit_itimers() and /proc/pid/timers
2022-07-21 21:19:59 +02:00
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
copy_process(): Move fd_install() out of sighand->siglock critical section
2022-02-23 12:01:08 +01:00
freezer.c
Revert "kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing"
2021-04-07 15:00:14 +02:00
futex.c
mm, futex: fix shared futex pgoff on shmem huge page
2021-06-30 08:47:29 -04:00
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
…
irq_work.c
irq_work, smp: Allow irq_work on call_single_queue
2020-05-28 10:54:15 +02:00
jump_label.c
jump_label: Fix jump_label_text_reserved() vs __init
2021-07-20 16:05:58 +02:00
kallsyms.c
treewide: Convert macro and uses of __section(foo) to __section("foo")
2020-10-25 14:51:49 -07:00
kcmp.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:46:24 +01:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
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_file.c
ima: force signature verification when CONFIG_KEXEC_SIG is configured
2022-07-21 21:20:11 +02:00
kexec_internal.h
…
kexec.c
LSM: Introduce kernel_post_load_data() hook
2020-10-05 13:37:03 +02:00
kheaders.c
…
kmod.c
kmod: remove redundant "be an" in the comment
2020-08-12 10:58:01 -07:00
kprobes.c
kprobes: Prohibit probes in gate area
2022-09-15 11:32:03 +02:00
ksysfs.c
…
kthread.c
kthread: Fix PF_KTHREAD vs to_kthread() race
2021-09-03 10:09:31 +02:00
latencytop.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
Makefile
kbuild: update config_data.gz only when the content of .config is changed
2021-05-11 14:47:37 +02:00
module_signature.c
module: harden ELF info handling
2021-03-25 09:04:11 +01:00
module_signing.c
module: harden ELF info handling
2021-03-25 09:04:11 +01:00
module-internal.h
…
module.c
module: check for exit sections in layout_sections() instead of module_init_section()
2022-05-25 09:18:02 +02:00
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
memcg: enable accounting for pids in nested pid namespaces
2021-09-18 13:40:36 +02:00
pid.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:46:24 +01:00
profile.c
profiling: fix shift too large makes kernel panic
2022-08-21 15:16:05 +02:00
ptrace.c
ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
2022-06-09 10:20:49 +02:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
reboot: fix overflow parsing reboot cpu number
2020-11-14 11:26:03 -08:00
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 walk_mem_res() find all busy IORESOURCE_MEM resources
2021-05-19 10:13:09 +02:00
rseq.c
rseq: Remove broken uapi field layout on 32-bit little endian
2022-04-08 14:40:03 +02:00
scftorture.c
scftorture: Fix distribution of short handler delays
2022-06-09 10:21:01 +02:00
scs.c
mm: memcontrol: account kernel stack per node
2020-08-07 11:33:25 -07:00
seccomp.c
seccomp: Fix setting loaded filter count during TSYNC
2021-08-18 08:59:06 +02:00
signal.c
signal handling: don't use BUG_ON() for debugging
2022-07-21 21:20:18 +02:00
smp.c
smp: Fix offline cpu check in flush_smp_call_function_queue()
2022-04-20 09:23:29 +02:00
smpboot.c
sched/core: Initialize the idle task with preemption disabled
2021-07-14 16:55:50 +02:00
smpboot.h
…
softirq.c
softirq: Add debug check to __raise_softirq_irqoff()
2020-09-16 15:18:56 +02:00
stackleak.c
gcc-plugins/stackleak: Use noinstr in favor of notrace
2022-02-23 12:01:00 +01:00
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 unused variable warn w/o MODULE
2021-09-08 08:49:00 +02:00
stop_machine.c
stop_machine, rcu: Mark functions as notrace
2020-10-26 12:12:27 +01:00
sys_ni.c
kernel/sys_ni: add compat entry for fadvise64_64
2022-08-31 17:15:13 +02:00
sys.c
prctl: allow to setup brk for et_dyn executables
2021-09-26 14:08:57 +02:00
sysctl-test.c
…
sysctl.c
mm: sysctl: fix missing numa_stat when !CONFIG_HUGETLB_PAGE
2022-07-21 21:20:13 +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
…
torture.c
torture: Dump ftrace at shutdown only if requested
2020-06-29 12:01:45 -07:00
tracepoint.c
tracepoint: Use rcu get state and cond sync for static call updates
2021-09-03 10:09:30 +02:00
tsacct.c
taskstats: Cleanup the use of task->exit_code
2022-01-27 10:54:33 +01:00
ucount.c
Revert "Add a reference to ucounts for each cred"
2021-09-08 08:49:00 +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: Fix smp_call_function_single_async prototype
2021-05-14 09:50:46 +02:00
user_namespace.c
Revert "Add a reference to ucounts for each cred"
2021-09-08 08:49:00 +02:00
user-return-notifier.c
…
user.c
user.c: make uidhash_table static
2020-06-04 19:06:24 -07:00
usermode_driver.c
bpf: Fix umd memory leak in copy_process()
2021-03-30 14:32:03 +02:00
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: Fix missing locking in add_watch_to_object()
2022-08-03 12:00:44 +02:00
watchdog_hld.c
…
watchdog.c
watchdog: export lockup_detector_reconfigure
2022-08-25 11:38:20 +02:00
workqueue_internal.h
…
workqueue.c
workqueue: Fix unbind_workers() VS wq_worker_running() race
2022-01-16 09:14:22 +01:00