Pavel Begunkov 840c6def24 kernel: rerun task_work while freezing in get_signal() ... commit 943ad0b62e upstream. io_uring can asynchronously add a task_work while the task is getting freezed. TIF_NOTIFY_SIGNAL will prevent the task from sleeping in do_freezer_trap(), and since the get_signal()'s relock loop doesn't retry task_work, the task will spin there not being able to sleep until the freezing is cancelled / the task is killed / etc. Run task_works in the freezer path. Keep the patch small and simple so it can be easily back ported, but we might need to do some cleaning after and look if there are other places with similar problems. Cc: stable@vger.kernel.org Link: https://github.com/systemd/systemd/issues/33626 Fixes: 12db8b6900 ("entry: Add support for TIF_NOTIFY_SIGNAL") Reported-by: Julian Orth <ju.orth@gmail.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/89ed3a52933370deaaf61a0a620a6ac91f1e754d.1720634146.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-08-19 05:45:22 +02:00
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autogroup.h
clock.h
coredump.h
cpufreq.h
cputime.h
deadline.h
debug.h
hotplug.h
idle.h
init.h
isolation.h
jobctl.h
loadavg.h
mm.h
nohz.h
numa_balancing.h
prio.h
rt.h	sched/core: Always flush pending blk_plug	2022-08-17 14:23:01 +02:00
sd_flags.h
signal.h	kernel: rerun task_work while freezing in get_signal()	2024-08-19 05:45:22 +02:00
smt.h
stat.h
sysctl.h
task_stack.h	sched: Fix KCSAN noinstr violation	2023-05-24 17:36:47 +01:00
task.h	kernel/fork: beware of __put_task_struct() calling context	2023-09-23 11:09:55 +02:00
topology.h	sched/fair: Introduce SIS_UTIL to search idle CPU based on sum of util_avg	2022-08-17 14:23:00 +02:00
types.h
user.h
wake_q.h
xacct.h