rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2972/1:b..l
(detected by 0, t=10506 jiffies, g=79525, q=92 ncpus=2)
task:udevd state:R running task stack:24816 pid:2972 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5191 [inline]
__schedule+0xae9/0x53f0 kernel/sched/core.c:6503
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6815
irqentry_exit+0x31/0x80 kernel/entry/common.c:432
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__kuid_val include/linux/uidgid.h:36 [inline]
RIP: 0010:uid_eq include/linux/uidgid.h:63 [inline]
RIP: 0010:acl_permission_check fs/namei.c:343 [inline]
RIP: 0010:generic_permission+0x184/0x7a0 fs/namei.c:404
Code: 80 3c 11 00 0f 85 c0 05 00 00 4d 8b b6 10 08 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7e 2c 48 89 f9 48 c1 e9 03 0f b6 0c 01 <48> 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 49 03 00 00 45
RSP: 0018:ffffc900031dfa78 EFLAGS: 00000217
RAX: dffffc0000000000 RBX: 00000000000041ed RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff81da2bf9 RDI: ffff88801837c02c
RBP: ffff888144c782b0 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000081
R13: ffffffff8be44360 R14: ffff88801837c000 R15: 0000000000000000
do_inode_permission fs/namei.c:465 [inline]
inode_permission.part.0+0x99/0x670 fs/namei.c:525
inode_permission fs/namei.c:506 [inline]
may_lookup fs/namei.c:1711 [inline]
link_path_walk.part.0+0x277/0xe20 fs/namei.c:2262
link_path_walk fs/namei.c:2244 [inline]
path_lookupat+0xb7/0x840 fs/namei.c:2473
filename_lookup+0x1ce/0x590 fs/namei.c:2503
user_path_at_empty+0x42/0x60 fs/namei.c:2876
do_readlinkat+0xcd/0x2f0 fs/stat.c:468
__do_sys_readlink fs/stat.c:501 [inline]
__se_sys_readlink fs/stat.c:498 [inline]
__x64_sys_readlink+0x74/0xb0 fs/stat.c:498
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f015b327277
RSP: 002b:00007fffa85b64c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007fffa85b64d8 RCX: 00007f015b327277
RDX: 0000000000000400 RSI: 00007fffa85b64d8 RDI: 00007fffa85b69b8
RBP: 0000000000000400 R08: 000000001fffffff R09: 00007f015b3f5a60
R10: 000055bc1e8fd8d0 R11: 0000000000000246 R12: 00007fffa85b69b8
R13: 00007fffa85b6928 R14: 000055bc1e8d2910 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10502 jiffies! g79525 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:28184 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5191 [inline]
__schedule+0xae9/0x53f0 kernel/sched/core.c:6503
schedule+0xda/0x1b0 kernel/sched/core.c:6579
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1660
rcu_gp_kthread+0x236/0x360 kernel/rcu/tree.c:1859
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 13705 Comm: syz-executor.3 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:mark_lock.part.0+0x171/0x1910 kernel/locking/lockdep.c:4653
Code: 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 c7 43 14 00 00 00 00 48 8b 84 24 30 01 00 00 65 48 2b 04 25 28 00 00 00 <0f> 85 2b 13 00 00 48 81 c4 38 01 00 00 44 89 d0 5b 5d 41 5c 41 5d
RSP: 0018:ffffc900001e09d8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: fffff5200003c142 RCX: 1ffffffff2136d9e
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff909b6cf0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff90932a9f
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801f734548
R13: 0000000000000000 R14: 0000000000000aff R15: ffff88801f734568
FS: 00005555566a8400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe83c6abf8 CR3: 00000000a0ce1000 CR4: 0000000000350ee0
Call Trace:
mark_lock kernel/locking/lockdep.c:4598 [inline]
mark_usage kernel/locking/lockdep.c:4526 [inline]
__lock_acquire+0x14a2/0x56d0 kernel/locking/lockdep.c:5009
lock_acquire kernel/locking/lockdep.c:5668 [inline]
lock_acquire+0x1df/0x630 kernel/locking/lockdep.c:5633
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:350 [inline]
advance_sched+0x53/0x9a0 net/sched/sch_taprio.c:700
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x690/0xfb0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline]
__sysvec_apic_timer_interrupt+0x17c/0x640 arch/x86/kernel/apic/apic.c:1113
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207
Code: 00 00 e9 96 56 87 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 f9 c2 85 7e 89 c1 48 8b 34 24 <81> e1 00 01 00 00 65 48 8b 14 25 c0 6f 02 00 a9 00 01 ff 00 74 0e
RSP: 0018:ffffc90003a8fad8 EFLAGS: 00000216
RAX: 0000000080000000 RBX: ffff8880744d0886 RCX: 0000000080000000
RDX: ffff88801f733a80 RSI: ffffffff83c5ad4c RDI: 0000000000000001
RBP: ffffc90003a8fb60 R08: 0000000000000001 R09: 000000000000005c
R10: 0000000000000073 R11: 000000000008c07e R12: 0000000000000006
R13: ffff8880744d0880 R14: 000000000000003f R15: 0000000000000073
tomoyo_const_part_length security/tomoyo/util.c:644 [inline]
tomoyo_fill_path_info+0xbc/0x410 security/tomoyo/util.c:682
tomoyo_get_realpath security/tomoyo/file.c:153 [inline]
tomoyo_path_perm+0x2b0/0x400 security/tomoyo/file.c:822
tomoyo_path_unlink+0x8e/0xd0 security/tomoyo/tomoyo.c:149
security_path_unlink+0xd7/0x150 security/security.c:1175
do_unlinkat+0x363/0x650 fs/namei.c:4315
__do_sys_unlink fs/namei.c:4367 [inline]
__se_sys_unlink fs/namei.c:4365 [inline]
__x64_sys_unlink+0xc6/0x110 fs/namei.c:4365
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc18008af77
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe83c6b338 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc18008af77
RDX: 00007ffe83c6b370 RSI: 00007ffe83c6b370 RDI: 00007ffe83c6b400
RBP: 00007ffe83c6b400 R08: 0000000000000001 R09: 00007ffe83c6b1d0
R10: 00005555566a9893 R11: 0000000000000206 R12: 00007fc1800e5826
R13: 00007ffe83c6c4c0 R14: 00005555566a9810 R15: 00007ffe83c6c500