rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=589/1/0x4000000000000000 softirq=30665/30666 fqs=1
(detected by 1, t=10502 jiffies, g=46537, q=111)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2967 Comm: udevd Not tainted 5.18.0-rc7-syzkaller-00181-geaea45fc0e7b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_is_held_type+0x106/0x140 kernel/locking/lockdep.c:5689
Code: 65 0f c1 05 34 65 95 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 44 89 e8 5b 5d 41 5c <41> 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48 c7 c7 20 44 cc 89 e8
RSP: 0018:ffffc90000007c18 EFLAGS: 00000096
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000010003 RDI: 0000000000000000
RBP: 1ffff92000000f8b R08: 0000000000000000 R09: ffffffff8db8eb17
R10: fffffbfff1b71d62 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88807c37acb0
FS: 00007f9ad60fe840(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9786fa0000 CR3: 000000007c006000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x522/0x720 kernel/locking/lockdep.c:5652
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x16/0x70 kernel/locking/spinlock.c:194
debug_object_activate+0x287/0x3e0 lib/debugobjects.c:689
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer+0x27/0x3e0 kernel/time/hrtimer.c:1084
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0xb02/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:kasan_check_range+0x16/0x180 mm/kasan/generic.c:188
Code: ff ff 89 43 08 5b 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 85 f6 0f 84 3c 01 00 00 49 89 f9 41 54 44 0f b6 c2 49 01 f1 55 <53> 0f 82 18 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 c7 0f 86
RSP: 0018:ffffc9000304f768 EFLAGS: 00000292
RAX: 0000000000000000 RBX: ffff888011e11cd8 RCX: ffffffff896f7665
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff888011e11cd8
RBP: ffff888140f17740 R08: 0000000000000001 R09: ffff888011e11ce0
R10: fffffbfff200e521 R11: 0000000000000001 R12: 1ffff92000609ef2
R13: dffffc0000000000 R14: ffff888011e11cd8 R15: ffffc9000304fba0
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:1309 [inline]
rwsem_read_trylock kernel/locking/rwsem.c:237 [inline]
__down_read_common kernel/locking/rwsem.c:1213 [inline]
__down_read kernel/locking/rwsem.c:1223 [inline]
down_read+0xa5/0x440 kernel/locking/rwsem.c:1463
kernfs_dop_revalidate+0xec/0x600 fs/kernfs/dir.c:1091
d_revalidate fs/namei.c:854 [inline]
d_revalidate fs/namei.c:851 [inline]
lookup_fast+0x385/0x6d0 fs/namei.c:1668
walk_component+0xcf/0x6a0 fs/namei.c:2016
link_path_walk.part.0+0x7ef/0xf70 fs/namei.c:2347
link_path_walk fs/namei.c:2271 [inline]
path_lookupat+0xc8/0x860 fs/namei.c:2498
filename_lookup+0x1c6/0x590 fs/namei.c:2528
vfs_statx+0x148/0x390 fs/stat.c:228
vfs_fstatat+0x8c/0xb0 fs/stat.c:255
__do_sys_newfstatat+0x91/0x110 fs/stat.c:425
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+0x44/0xae
RIP: 0033:0x7f9ad5d251da
Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 69 fc 0c 00 f7
RSP: 002b:00007ffc72ce4858 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 00007ffc72ce5418 RCX: 00007f9ad5d251da
RDX: 00007ffc72ce4868 RSI: 00007ffc72ce4cf8 RDI: 00000000ffffff9c
RBP: 00007ffc72ce48f8 R08: 0000000000000000 R09: 000055cee848e060
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc72ce4cf8
R13: 00007ffc72ce4868 R14: 000055cee84572c0 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10500 jiffies! g46537 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:28944 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1971
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 45 Comm: kworker/u4:2 Not tainted 5.18.0-rc7-syzkaller-00181-geaea45fc0e7b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:490
print_other_cpu_stall kernel/rcu/tree_stall.h:595 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:741 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq+0x1f7c/0x2150 kernel/rcu/tree.c:2625
update_process_times+0x16d/0x200 kernel/time/timer.c:1788
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:csd_lock_wait kernel/smp.c:411 [inline]
RIP: 0010:smp_call_function_many_cond+0x499/0x1110 kernel/smp.c:969
Code: 01 89 ee e8 99 d2 0b 00 85 ed 74 47 48 8b 04 24 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 fc 83 c5 03 e8 59 d0 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 21 0a 00 00 8b 43 08 31
RSP: 0018:ffffc90000d6f950 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9c44fc0 RCX: 0000000000000000
RDX: ffff888018438180 RSI: ffffffff816ca537 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816ca55d R11: 0000000000000000 R12: ffffed10173889f9
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1184 [inline]
text_poke_bp_batch+0x22c/0x6b0 arch/x86/kernel/alternative.c:1372
text_poke_flush arch/x86/kernel/alternative.c:1542 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1539 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1549
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32f/0x410 kernel/jump_label.c:830
static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:774 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:766
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
----------------
Code disassembly (best guess):
0: 65 0f c1 05 34 65 95 xadd %eax,%gs:0x76956534(%rip) # 0x7695653c
7: 76
8: 83 f8 01 cmp $0x1,%eax
b: 75 29 jne 0x36
d: 9c pushfq
e: 58 pop %rax
f: f6 c4 02 test $0x2,%ah
12: 75 3d jne 0x51
14: 48 f7 04 24 00 02 00 testq $0x200,(%rsp)
1b: 00
1c: 74 01 je 0x1f
1e: fb sti
1f: 48 83 c4 08 add $0x8,%rsp
23: 44 89 e8 mov %r13d,%eax
26: 5b pop %rbx
27: 5d pop %rbp
28: 41 5c pop %r12
* 2a: 41 5d pop %r13 <-- trapping instruction
2c: 41 5e pop %r14
2e: 41 5f pop %r15
30: c3 retq
31: 45 31 ed xor %r13d,%r13d
34: eb b9 jmp 0xffffffef
36: 0f 0b ud2
38: 48 c7 c7 20 44 cc 89 mov $0xffffffff89cc4420,%rdi
3f: e8 .byte 0xe8