rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2/1:b..l P5616/1:b..l P4998/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=20885, q=373563 ncpus=2)
task:udevd state:R running task stack:23976 pid:4998 tgid:4998 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1840/0x57a0 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8e0 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:114 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:128 [inline]
RIP: 0010:lock_release+0x94/0x3c0 kernel/locking/lockdep.c:5885
Code: 85 0d 02 00 00 65 4c 8b 3d 71 fc 94 11 41 83 bf 8c 0b 00 00 00 0f 85 f7 01 00 00 49 81 3e 80 43 fa 93 0f 84 ea 01 00 00 9c 5b 48 c7 c7 b9 bc fb 8d e8 3f ef 00 0a 65 ff 05 e8 41 95 11 c7 44
RSP: 0018:ffffc900031ff7f8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000202 RCX: 0000000080000001
RDX: ffffc900031ff901 RSI: ffffffff8c289980 RDI: ffffffff8c289940
RBP: 1ffffffff21a1001 R08: ffffc900031ffcb0 R09: 0000000000000000
R10: ffffc900031ff958 R11: fffff5200063ff2d R12: ffffc900031f8000
R13: ffffffff81769f7f R14: ffffffff8e95c780 R15: ffff88807c340000
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1397 [inline]
__free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
__slab_free+0x274/0x2c0 mm/slub.c:5613
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4570 [inline]
slab_alloc_node mm/slub.c:4899 [inline]
kmem_cache_alloc_noprof+0x2b8/0x650 mm/slub.c:4906
alloc_filename fs/namei.c:142 [inline]
do_getname+0x2e/0x250 fs/namei.c:182
class_filename_flags_constructor include/linux/fs.h:2555 [inline]
do_readlinkat+0xc8/0x510 fs/stat.c:569
__do_sys_readlink fs/stat.c:605 [inline]
__se_sys_readlink fs/stat.c:602 [inline]
__x64_sys_readlink+0x7f/0x90 fs/stat.c:602
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf1fb153a7
RSP: 002b:00007ffc2345ad98 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffc2345b270 RCX: 00007fbf1fb153a7
RDX: 0000000000000400 RSI: 00007ffc2345ada0 RDI: 00007ffc2345b270
RBP: 00007ffc2345ada0 R08: 0000000000000073 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000400
R13: 0000000000000100 R14: 0000564bd30c9be0 R15: 00007ffc2345bcf0
task:syz-executor state:R running task stack:22016 pid:5616 tgid:5616 ppid:5615 task_flags:0x400100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1840/0x57a0 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8e0 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x49f/0x2550 arch/x86/kernel/unwind_orc.c:520
Code: 00 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 bf 19 00 00 0f b6 43 01 83 e0 07 0f 84 7c 16 00 00 83 f8 01 4c 8b 6c 24 50 <49> bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 10 49 8d 6e 38 0f 84 8a
RSP: 0018:ffffc90003a3f7c0 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffffffff90c802f4 RCX: ffffffff904b16b4
RDX: ffffffff90c802f0 RSI: ffffffff90c802f0 RDI: ffffffff8c289940
RBP: ffffffff81b07148 R08: 000000000000000c R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e95c780 R12: dffffc0000000000
R13: ffffffff81769f7f R14: ffffc90003a3f868 R15: ffffffff904b16b0
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1397 [inline]
__free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
__slab_free+0x274/0x2c0 mm/slub.c:5613
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:406
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5296 [inline]
__kmalloc_noprof+0x358/0x750 mm/slub.c:5308
kmalloc_noprof include/linux/slab.h:954 [inline]
kzalloc_noprof include/linux/slab.h:1188 [inline]
alloc_pipe_info+0x1f9/0x4c0 fs/pipe.c:817
get_pipe_inode fs/pipe.c:896 [inline]
create_pipe_files+0x88/0x7c0 fs/pipe.c:928
__do_pipe_flags+0x46/0x1f0 fs/pipe.c:990
do_pipe2+0xaa/0x190 fs/pipe.c:1038
__do_sys_pipe2 fs/pipe.c:1056 [inline]
__se_sys_pipe2 fs/pipe.c:1054 [inline]
__x64_sys_pipe2+0x5a/0x70 fs/pipe.c:1054
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5906b9be89
RSP: 002b:00007fff03587118 EFLAGS: 00000246 ORIG_RAX: 0000000000000125
RAX: ffffffffffffffda RBX: 0000555592446fc0 RCX: 00007f5906b9be89
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 00007fff03587128
RBP: 00007fff035876f0 R08: 00000000000000b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff03587530
R13: 00005555924497d8 R14: 0000555592453b00 R15: 00007fff03587270
task:kthreadd state:R running task stack:26088 pid:2 tgid:2 ppid:0 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1840/0x57a0 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8e0 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:217 [inline]
RIP: 0010:unwind_next_frame+0x1b4/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 8b 2f 48 83 f3 01 48 c7 c2 20 a5 c9 8b 48 29 dd 0f 84 b5 02 00 00 48 81 fd 00 00 00 81 0f 92 c0 48 81 fd c8 22 a6 8b 0f 93 c1 <08> c1 0f 85 0b 01 00 00 48 c7 c0 00 00 00 81 49 89 ef 49 29 c7 49
RSP: 0018:ffffc90000077340 EFLAGS: 00000293
RAX: 1ffff9200000ee00 RBX: 0000000000000001 RCX: 0000000080000000
RDX: ffffffff8bc9a520 RSI: ffffffff8c289980 RDI: ffffffff8c289940
RBP: ffffffff82252873 R08: ffffffff81769f7f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e95c780 R12: dffffc0000000000
R13: ffffffff81769f7f R14: ffffc900000773e8 R15: ffffc90000077430
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1397 [inline]
__free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
__slab_free+0x274/0x2c0 mm/slub.c:5613
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4570 [inline]
slab_alloc_node mm/slub.c:4899 [inline]
kmem_cache_alloc_noprof+0x2b8/0x650 mm/slub.c:4906
prepare_creds+0x30/0x820 kernel/cred.c:185
copy_creds+0x109/0x9f0 kernel/cred.c:286
copy_process+0xcd2/0x4380 kernel/fork.c:2125
kernel_clone+0x2d7/0x940 kernel/fork.c:2722
kernel_thread+0x13f/0x1b0 kernel/fork.c:2783
create_kthread kernel/kthread.c:459 [inline]
kthreadd+0x4ec/0x6e0 kernel/kthread.c:817
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245