rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11571/1:b..l P11454/2:b..l P11092/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=257853, q=970 ncpus=2)
task:kworker/0:2 state:R running task stack:27400 pid:11092 tgid:11092 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_notrace+0x62/0xe0 kernel/sched/core.c:7140
preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
rcu_is_watching+0x8e/0xc0 kernel/rcu/tree.c:752
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0x2cd/0x330 kernel/locking/lockdep.c:5831
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
gc_worker+0x241/0x16e0 net/netfilter/nf_conntrack_core.c:1546
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
task:syz.1.10088 state:R running task stack:24040 pid:11454 tgid:11454 ppid:6304 task_flags:0x40064c flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:raw_atomic_fetch_add_unless include/linux/atomic/atomic-arch-fallback.h:2429 [inline]
RIP: 0010:raw_atomic_add_unless include/linux/atomic/atomic-arch-fallback.h:2456 [inline]
RIP: 0010:atomic_add_unless include/linux/atomic/atomic-instrumented.h:1518 [inline]
RIP: 0010:page_ref_add_unless.constprop.0+0x9c/0x390 include/linux/page_ref.h:238
Code: 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 48 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 c5 02 00 00 8b 5b 34 ef 29 c7 ff 31 ff 89 de 41 89 dd e8 83 24 c7 ff 85 db 0f 84 9f
RSP: 0018:ffffc900041ff280 EFLAGS: 00000246
RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff81f7c11f
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0001317f74
RBP: ffffea0001317f74 R08: 0000000000000001 R09: fffff94000262fee
R10: ffffea0001317f77 R11: ffff888091b20b30 R12: 1ffff9200083fe5e
R13: ffffc900041ff310 R14: fffffffffffffffe R15: 0000000000000004
folio_ref_add_unless include/linux/page_ref.h:248 [inline]
folio_try_get include/linux/page_ref.h:264 [inline]
find_get_entry mm/filemap.c:2076 [inline]
find_lock_entries+0x1c1/0xbf0 mm/filemap.c:2166
shmem_undo_range+0x216/0x1140 mm/shmem.c:1119
shmem_truncate_range mm/shmem.c:1249 [inline]
shmem_evict_inode+0x39e/0xbe0 mm/shmem.c:1379
evict+0x3c2/0xad0 fs/inode.c:837
iput_final fs/inode.c:1954 [inline]
iput.part.0+0x621/0x1190 fs/inode.c:2006
iput+0x35/0x40 fs/inode.c:1969
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:467
__dentry_kill+0x1d0/0x600 fs/dcache.c:670
finish_dput+0x76/0x480 fs/dcache.c:879
dput.part.0+0x451/0x570 fs/dcache.c:928
dput+0x1f/0x30 fs/dcache.c:920
__fput+0x51c/0xb70 fs/file_table.c:476
task_work_run+0x150/0x240 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x87f/0x2bd0 kernel/exit.c:971
do_group_exit+0xd3/0x2a0 kernel/exit.c:1112
get_signal+0x2671/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
irqentry_exit+0x38a/0x8c0 kernel/entry/common.c:196
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fbd2178f751
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fbd219e6270 RCX: 00007fbd2178f749
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007fbd21813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fbd219e6308 R14: 00007fbd219e6270 R15: 00007ffcf9705418
task:syz-executor state:R running task stack:28520 pid:11571 tgid:11571 ppid:6825 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mls_compute_sid+0x48/0x10a0 security/selinux/ss/mls.c:483
Code: 89 fd 53 4c 89 cb 48 83 c4 80 4c 8d 74 24 20 8b 84 24 b8 00 00 00 48 89 54 24 08 49 c1 ee 03 89 0c 24 4b 8d 14 3e 89 44 24 14 <88> 44 24 13 66 89 4c 24 10 48 c7 44 24 20 b3 8a b5 41 48 c7 44 24
RSP: 0018:ffffc90004997798 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffc90004997a20 RCX: 0000000000000009
RDX: fffff52000932ef7 RSI: ffff88802b2d4140 RDI: ffff888036bdc808
RBP: ffff888036bdc808 R08: 0000000000000010 R09: ffffc90004997a20
R10: 0000000000000000 R11: ffff8880266c2ff0 R12: 0000000000000010
R13: ffff88802b2d4140 R14: 1ffff92000932ef7 R15: dffffc0000000000
security_compute_sid+0x81a/0x2140 security/selinux/ss/services.c:1918
security_transition_sid+0x68/0x80 security/selinux/ss/services.c:1968
selinux_determine_inode_label+0x2af/0x400 security/selinux/hooks.c:1809
selinux_inode_init_security+0x281/0x660 security/selinux/hooks.c:2950
security_inode_init_security+0x1bc/0x370 security/security.c:1328
shmem_symlink+0x138/0x960 mm/shmem.c:4108
vfs_symlink fs/namei.c:5523 [inline]
vfs_symlink+0x4b5/0x800 fs/namei.c:5502
do_symlinkat+0x353/0x4b0 fs/namei.c:5550
__do_sys_symlinkat fs/namei.c:5571 [inline]
__se_sys_symlinkat fs/namei.c:5568 [inline]
__x64_sys_symlinkat+0x93/0xc0 fs/namei.c:5568
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe84098ecc7
RSP: 002b:00007ffd0fb87438 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe84098ecc7
RDX: 00007fe840a158d7 RSI: 00000000ffffff9c RDI: 00007ffd0fb874d0
RBP: 00007ffd0fb8747c R08: 0000000000000013 R09: 00007ffd0fb87187
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000000d5
R13: 00000000000927c0 R14: 0000000000298536 R15: 00007ffd0fb874d0
rcu: rcu_preempt kthread starved for 10598 jiffies! g257853 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27800 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: 96 5f 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 09 12 00 fb f4 cc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197de8 EFLAGS: 000002c6
RAX: 000000000b8f0f9f RBX: 0000000000000001 RCX: ffffffff8b7856d9
RDX: 0000000000000000 RSI: ffffffff8daceab2 RDI: ffffffff8bf2b400
RBP: ffffed1003b56498 R08: 0000000000000001 R09: ffffed10170a673d
R10: ffff8880b85339eb R11: ffff88801dab2ff0 R12: 0000000000000001
R13: ffff88801dab24c0 R14: ffffffff9088bdd0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8bdad377cf CR3: 00000000362b5000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x38d/0x510 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148