Jinliang Zheng 3409634195 mm: optimize the redundant loop of mm_update_owner_next() ...

commit cf3f9a593dab87a032d2b6a6fb205e7f3de4f0a1 upstream.

When mm_update_owner_next() is racing with swapoff (try_to_unuse()) or
/proc or ptrace or page migration (get_task_mm()), it is impossible to
find an appropriate task_struct in the loop whose mm_struct is the same as
the target mm_struct.

If the above race condition is combined with the stress-ng-zombie and
stress-ng-dup tests, such a long loop can easily cause a Hard Lockup in
write_lock_irq() for tasklist_lock.

Recognize this situation in advance and exit early.

Link: https://lkml.kernel.org/r/20240620122123.3877432-1-alexjlzheng@tencent.com
Signed-off-by: Jinliang Zheng <alexjlzheng@tencent.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Tycho Andersen <tandersen@netflix.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 2890a7faf552dd3e4e40e343610ba3e0ba5b788e)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>

2024-08-23 16:50:05 +00:00

..

bpf

bpf: Fix stackmap overflow check on 32-bit arches

2024-04-16 10:30:29 +00:00

cgroup

sched/fair: Allow disabling sched_balance_newidle with sched_relax_domain_level

2024-07-08 08:15:11 +00:00

configs

…

debug

kdb: Use format-specifiers rather than memset() for padding in kdb_read()

2024-07-15 18:30:24 +00:00

events

perf/core: Fix reentry problem in perf_output_read_group()

2024-05-30 09:00:41 +00:00

gcov

gcov: add support for GCC 14

2024-08-08 15:52:18 +00:00

irq

genirq/generic_chip: Make irq_remove_generic_chip() irqdomain aware

2023-11-28 16:45:45 +00:00

livepatch

livepatch: fix race between fork and KLP transition

2022-10-26 13:16:57 +02:00

locking

locking/ww_mutex/test: Fix potential workqueue corruption

2023-11-28 16:45:42 +00:00

power

PM: suspend: Set mem_sleep_current during kernel command line setup

2024-05-30 08:58:50 +00:00

printk

printk: Update @console_may_schedule in console_trylock_spinning()

2024-05-30 09:00:41 +00:00

rcu

rcutorture: Fix rcu_torture_one_read() pipe_count overflow comment

2024-08-08 15:52:17 +00:00

sched

sched/fair: Allow disabling sched_balance_newidle with sched_relax_domain_level

2024-07-08 08:15:11 +00:00

time

timekeeping: Fix cross-timestamp interpolation for non-x86

2024-04-16 10:30:27 +00:00

trace

ring-buffer: Fix a race between readers and resize checks

2024-07-08 08:14:19 +00:00

.gitignore

…

acct.c

acct: fix potential integer overflow in encode_comp_t()

2023-01-18 09:26:30 +01:00

async.c

treewide: Remove uninitialized_var() usage

2023-08-11 11:33:32 +02:00

audit_fsnotify.c

audit: fix potential double free on error path from fsnotify_add_inode_mark

2022-09-05 10:25:02 +02:00

audit_tree.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

audit_watch.c

audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()

2023-11-28 16:45:44 +00:00

audit.c

audit: Send netlink ACK before setting connection in auditd_set

2024-03-08 08:21:30 +00:00

audit.h

audit: fix a net reference leak in audit_list_rules_send()

2020-06-20 10:25:10 +02:00

auditfilter.c

audit: fix a net reference leak in audit_list_rules_send()

2020-06-20 10:25:10 +02:00

auditsc.c

audit: fix possible soft lockup in __audit_inode_child()

2023-09-23 10:46:56 +02:00

backtracetest.c

…

bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:15:08 -08:00

capability.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

compat.c

sched_getaffinity: don't assume 'cpumask_size()' is fully initialized

2023-04-05 11:14:19 +02:00

configs.c

…

context_tracking.c

…

cpu_pm.c

kernel/cpu_pm: Fix uninitted local in cpu_pm

2020-06-20 10:25:19 +02:00

cpu.c

random: clear fast pool, crng, and batches in cpuhp bring up

2022-06-25 11:46:35 +02:00

crash_core.c

kdump: write correct address of mem_section into vmcoreinfo

2018-01-17 09:45:27 +01:00

crash_dump.c

…

cred.c

cred: switch to using atomic_long_t

2023-12-20 15:32:35 +01:00

delayacct.c

delayacct: Use raw_spinlocks

2018-08-03 07:50:38 +02:00

dma.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

exec_domain.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

exit.c

mm: optimize the redundant loop of mm_update_owner_next()

2024-08-23 16:50:05 +00:00

extable.c

kernel/extable.c: use address-of operator on section symbols

2023-06-09 10:22:53 +02:00

fork.c

mm/hugetlb: initialize hugetlb_usage in mm_init

2021-09-22 11:45:32 +02:00

freezer.c

…

futex.c

treewide: Remove uninitialized_var() usage

2023-08-11 11:33:32 +02:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2017-12-20 10:10:18 +01:00

hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:15:05 +02:00

irq_work.c

…

jump_label.c

sched/core: Fix cpu.max vs. cpuhotplug deadlock

2018-12-05 19:41:17 +01:00

kallsyms.c

kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol

2019-09-21 07:15:38 +02:00

kcmp.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:50:22 +02:00

kexec_core.c

kexec: fix a memory leak in crash_shrink_memory()

2023-08-11 11:33:34 +02:00

kexec_file.c

kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]

2022-07-02 16:18:11 +02:00

kexec_internal.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kexec.c

…

kmod.c

kmod: make request_module() return an error when autoloading is disabled

2020-04-24 08:00:44 +02:00

kprobes.c

kprobes: Fix possible use-after-free issue on kprobe registration

2024-05-31 12:30:39 +00:00

ksysfs.c

…

kthread.c

kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()

2021-07-11 12:48:13 +02:00

latencytop.c

…

Makefile

elfcore: fix building with clang

2021-02-10 09:12:08 +01:00

memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:01:02 +01:00

module_signing.c

…

module-internal.h

…

module.c

modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules

2023-09-23 10:46:52 +02:00

notifier.c

x86/mm: split vmalloc_sync_all()

2020-04-02 16:34:20 +02:00

nsproxy.c

…

padata.c

crypto: pcrypt - Fix hungtask for PADATA_RESET

2023-11-28 16:45:43 +00:00

panic.c

exit: Use READ_ONCE() for all oops/warn limit reads

2023-02-06 07:46:35 +01:00

params.c

params: lift param_set_uint_minmax to common code

2024-07-15 17:44:31 +00:00

pid_namespace.c

memcg: enable accounting for pids in nested pid namespaces

2021-09-22 11:45:32 +02:00

pid.c

…

profile.c

profiling: fix shift too large makes kernel panic

2022-08-25 11:11:24 +02:00

ptrace.c

ptrace: Reimplement PTRACE_KILL by always sending SIGKILL

2022-06-14 16:53:43 +02:00

range.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

reboot.c

reboot: fix overflow parsing reboot cpu number

2020-11-18 18:28:02 +01:00

relay.c

kernel/relay.c: fix memleak on destroy relay channel

2020-08-26 10:29:54 +02:00

resource.c

resource: fix integer overflow at reallocation

2018-04-24 09:36:22 +02:00

seccomp.c

seccomp: Invalidate seccomp mode to catch death failures

2022-02-16 12:44:52 +01:00

signal.c

signal handling: don't use BUG_ON() for debugging

2022-07-21 20:42:47 +02:00

smp.c

smp: Fix offline cpu check in flush_smp_call_function_queue()

2022-04-20 09:08:33 +02:00

smpboot.c

kthread: Extract KTHREAD_IS_PER_CPU

2021-02-07 14:47:41 +01:00

smpboot.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:12:47 +02:00

stacktrace.c

…

stop_machine.c

stop_machine: Atomically queue and wake stopper threads

2018-09-05 09:26:36 +02:00

sys_ni.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

sys.c

getrusage: use sig->stats_lock rather than lock_task_sighand()

2024-04-13 12:54:05 +00:00

sysctl_binary.c

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

sysctl.c

sched/rt: Disallow writing invalid values to sched_rt_period_us

2024-03-21 13:32:16 +00:00

task_work.c

locking/barriers: Convert users of lockless_dereference() to READ_ONCE()

2017-12-25 14:26:21 +01:00

taskstats.c

taskstats: fix data-race

2020-01-09 10:17:53 +01:00

test_kprobes.c

…

torture.c

…

tracepoint.c

tracepoint: Do not fail unregistering a probe due to memory failure

2021-03-03 18:22:47 +01:00

tsacct.c

taskstats: Cleanup the use of task->exit_code

2022-02-23 11:57:34 +01:00

ucount.c

…

uid16.c

kernel: make groups_sort calling a responsibility group_info allocators

2017-12-20 10:10:18 +01:00

umh.c

usermodehelper: reset umask to default before executing user process

2020-10-14 09:51:10 +02:00

up.c

smp: Fix smp_call_function_single_async prototype

2021-05-22 10:57:35 +02:00

user_namespace.c

userns: move user access out of the mutex

2018-09-09 19:56:00 +02:00

user-return-notifier.c

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user.c

…

utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 19:56:00 +02:00

utsname.c

…

watchdog_hld.c

watchdog/perf: more properly prevent false positives with turbo modes

2023-08-11 11:33:34 +02:00

watchdog.c

watchdog/softlockup: Enforce that timestamp is valid on boot

2020-02-28 16:36:05 +01:00

workqueue_internal.h

Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2017-11-06 12:26:49 -08:00

workqueue.c

scsi: zfcp: workqueue: set description for port work items with their WWPN as context

2024-05-06 14:36:37 +00:00