Pavel Begunkov 5c07084001 kernel: rerun task_work while freezing in get_signal() ... commit 943ad0b62e3c21f324c4884caa6cb4a871bca05c 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>		2024-08-03 08:54:13 +02:00
..
bpf	bpf: Eliminate remaining "make W=1" warnings in kernel/bpf/btf.o	2024-08-03 08:53:43 +02:00
cgroup	cgroup/cpuset: Prevent UAF in proc_cpuset_show()	2024-08-03 08:53:22 +02:00
configs	Kbuild updates for v6.6	2023-09-05 11:01:47 -07:00
debug	kdb: Use format-specifiers rather than memset() for padding in kdb_read()	2024-06-16 13:47:44 +02:00
dma	dma-mapping: benchmark: avoid needless copy_to_user if benchmark fails	2024-07-11 12:49:20 +02:00
entry	entry: Respect changes to system call number by trace_sys_enter()	2024-04-03 15:28:50 +02:00
events	perf: Fix default aux_watermark calculation	2024-08-03 08:53:41 +02:00
futex	futex: Don't include process MM in futex key on no-MMU	2023-11-20 11:58:53 +01:00
gcov	gcov: add support for GCC 14	2024-06-27 13:49:13 +02:00
irq	genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()	2024-06-16 13:47:46 +02:00
kcsan	kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures	2023-06-09 23:29:50 +10:00
livepatch	livepatch: Fix missing newline character in klp_resolve_symbols()	2023-11-20 11:59:25 +01:00
locking	locking/rwsem: Add __always_inline annotation to __down_write_common() and inlined callers	2024-08-03 08:53:42 +02:00
module	modules: wait do_free_init correctly	2024-03-26 18:19:55 -04:00
power	PM: s2idle: Make sure CPUs will wakeup directly on resume	2024-04-17 11:19:26 +02:00
printk	printk: For @suppress_panic_printk check for other CPU in panic	2024-04-13 13:07:29 +02:00
rcu	rcu/tasks: Fix stale task snaphot for Tasks Trace	2024-08-03 08:53:20 +02:00
sched	rcu/tasks: Fix stale task snaphot for Tasks Trace	2024-08-03 08:53:20 +02:00
time	tick/broadcast: Make takeover of broadcast hrtimer reliable	2024-08-03 08:54:12 +02:00
trace	tracing: Add MODULE_DESCRIPTION() to preemptirq_delay_test	2024-06-27 13:49:14 +02:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.kexec	kexec: select CRYPTO from KEXEC_FILE instead of depending on it	2024-01-05 15:19:41 +01:00
Kconfig.locks	…
Kconfig.preempt	…
Makefile	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:11:50 +02:00
acct.c	audit/stable-6.6 PR 20230829	2023-08-30 08:17:35 -07:00
async.c	async: Introduce async_schedule_dev_nocall()	2024-01-31 16:18:49 -08:00
audit.c	audit: Send netlink ACK before setting connection in auditd_set	2024-02-05 20:14:14 +00:00
audit.h	audit: correct audit_filter_inodes() definition	2023-07-21 12:17:25 -04:00
audit_fsnotify.c	…
audit_tree.c	…
audit_watch.c	audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()	2023-11-28 17:19:56 +00:00
auditfilter.c	ima: Avoid blocking in RCU read-side critical section	2024-07-11 12:49:18 +02:00
auditsc.c	audit,io_uring: io_uring openat triggers audit reference count underflow	2023-10-13 18:34:46 +02:00
backtracetest.c	…
bounds.c	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-05-02 16:32:50 +02:00
capability.c	lsm: constify the 'target' parameter in security_capget()	2023-08-08 16:48:47 -04:00
cfi.c	…
compat.c	…
configs.c	…
context_tracking.c	locking/atomic: treewide: use raw_atomic*_<op>()	2023-06-05 09:57:20 +02:00
cpu.c	cpu: Fix broken cmdline "nosmp" and "maxcpus=0"	2024-07-11 12:49:14 +02:00
cpu_pm.c	…
crash_core.c	mm: turn folio_test_hugetlb into a PageType	2024-05-02 16:32:47 +02:00
crash_dump.c	…
cred.c	cred: get rid of CONFIG_DEBUG_CREDENTIALS	2023-12-20 17:01:51 +01:00
delayacct.c	delayacct: track delays from IRQ/SOFTIRQ	2023-04-18 16:39:34 -07:00
dma.c	…
exec_domain.c	…
exit.c	mm: optimize the redundant loop of mm_update_owner_next()	2024-07-11 12:49:15 +02:00
extable.c	…
fail_function.c	…
fork.c	Revert "fork: defer linking file vma until vma is fully initialized"	2024-06-21 14:38:47 +02:00
freezer.c	…
gen_kheaders.sh	kheaders: explicitly define file modes for archived headers	2024-06-21 14:38:40 +02:00
groups.c	…
hung_task.c	…
iomem.c	kernel/iomem.c: remove __weak ioremap_cache helper	2023-08-21 13:37:28 -07:00
irq_work.c	…
jump_label.c	jump_label: Fix concurrency issues in static_key_slow_dec()	2024-08-03 08:53:38 +02:00
kallsyms.c	kallsyms: Change func signature for cleanup_symbol_name()	2023-08-25 15:00:36 -07:00
kallsyms_internal.h	…
kallsyms_selftest.c	Modules changes for v6.6-rc1	2023-08-29 17:32:32 -07:00
kallsyms_selftest.h	…
kcmp.c	…
kcov.c	kcov: don't lose track of remote references during softirqs	2024-06-27 13:49:13 +02:00
kexec.c	kernel: kexec: copy user-array safely	2023-11-28 17:19:40 +00:00
kexec_core.c	kexec: do syscore_shutdown() in kernel_kexec	2024-01-31 16:18:56 -08:00
kexec_elf.c	…
kexec_file.c	integrity-v6.6	2023-08-30 09:16:56 -07:00
kexec_internal.h	…
kheaders.c	…
kprobes.c	kprobe/ftrace: fix build error due to bad function definition	2024-06-27 13:49:15 +02:00
ksyms_common.c	kallsyms: make kallsyms_show_value() as generic function	2023-06-08 12:27:20 -07:00
ksysfs.c	crash: hotplug support for kexec_load()	2023-08-24 16:25:14 -07:00
kthread.c	kthread: add kthread_stop_put	2024-06-12 11:12:52 +02:00
latencytop.c	…
module_signature.c	…
notifier.c	…
nsproxy.c	nsproxy: Convert nsproxy.count to refcount_t	2023-08-21 11:29:12 -07:00
numa.c	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:11:50 +02:00
padata.c	padata: Disable BH when taking works lock on MT path	2024-06-27 13:49:00 +02:00
panic.c	panic: Flush kernel log buffer at the end	2024-04-13 13:07:29 +02:00
params.c	kernel: params: Remove unnecessary ‘0’ values from err	2023-07-10 12:47:01 -07:00
pid.c	pidfd: prevent a kernel-doc warning	2023-09-19 13:21:33 -07:00
pid_namespace.c	zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING	2024-06-21 14:38:50 +02:00
pid_sysctl.h	memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy	2023-08-21 13:37:59 -07:00
profile.c	…
ptrace.c	ptrace: Provide set/get interface for syscall user dispatch	2023-04-16 14:23:07 +02:00
range.c	…
reboot.c	kernel/reboot: emergency_restart: Set correct system_state	2023-11-28 17:20:04 +00:00
regset.c	…
relay.c	kernel: relay: remove unnecessary NULL values from relay_open_buf	2023-08-18 10:18:55 -07:00
resource.c	kernel/resource: Increment by align value in get_free_mem_region()	2024-01-10 17:16:58 +01:00
resource_kunit.c	…
rseq.c	…
scftorture.c	scftorture: Pause testing after memory-allocation failure	2023-07-14 15:02:57 -07:00
scs.c	…
seccomp.c	seccomp: Add missing kerndoc notations	2023-08-17 12:32:15 -07:00
signal.c	kernel: rerun task_work while freezing in get_signal()	2024-08-03 08:54:13 +02:00
smp.c	smp,csd: Throw an error if a CSD lock is stuck for too long	2023-11-28 17:19:36 +00:00
smpboot.c	kthread: add kthread_stop_put	2024-06-12 11:12:52 +02:00
smpboot.h	…
softirq.c	softirq: Fix suspicious RCU usage in __do_softirq()	2024-06-12 11:11:27 +02:00
stackleak.c	stackleak: allow to specify arch specific stackleak poison function	2023-04-20 11:36:35 +02:00
stacktrace.c	…
static_call.c	…
static_call_inline.c	…
stop_machine.c	…
sys.c	prctl: generalize PR_SET_MDWE support check to be per-arch	2024-04-03 15:28:54 +02:00
sys_ni.c	syscalls: fix compat_sys_io_pgetevents_time64 usage	2024-07-05 09:34:04 +02:00
sysctl-test.c	…
sysctl.c	v6.5-rc1-sysctl-next	2023-06-28 16:05:21 -07:00
task_work.c	task_work: add kerneldoc annotation for 'data' argument	2023-09-19 13:21:32 -07:00
taskstats.c	…
torture.c	rcutorture: Fix stuttering races and other issues	2023-11-28 17:20:08 +00:00
tracepoint.c	…
tsacct.c	…
ucount.c	sysctl: Add size to register_sysctl	2023-08-15 15:26:17 -07:00
uid16.c	…
uid16.h	…
umh.c	sysctl: fix unused proc_cap_handler() function warning	2023-06-29 15:19:43 -07:00
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	…
usermode_driver.c	…
utsname.c	…
utsname_sysctl.c	…
vhost_task.c	vhost_task: Handle SIGKILL by flushing work and exiting	2024-07-11 12:49:10 +02:00
watch_queue.c	kernel: watch_queue: copy user-array safely	2023-11-28 17:19:40 +00:00
watchdog.c	watchdog: move softlockup_panic back to early_param	2023-11-28 17:19:57 +00:00
watchdog_buddy.c	watchdog/hardlockup: move SMP barriers from common code to buddy code	2023-06-19 16:25:28 -07:00
watchdog_perf.c	watchdog/perf: add a weak function for an arch to detect if perf can use NMIs	2023-06-09 17:44:21 -07:00
workqueue.c	workqueue: Fix selection of wake_cpu in kick_pool()	2024-05-17 12:02:31 +02:00
workqueue_internal.h	workqueue: Drop the special locking rule for worker->flags and worker_pool->flags	2023-08-07 15:57:22 -10:00