rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=abd/1/0x4000000000000000 softirq=120366/120367 fqs=44
(detected by 0, t=10502 jiffies, g=204261, q=806)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10209 Comm: syz-executor.0 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4725 [inline]
RIP: 0010:__lock_acquire+0x65b/0x54a0 kernel/locking/lockdep.c:4977
Code: 01 f8 48 89 44 24 60 eb 66 48 8d 04 5b 48 c1 e0 06 48 05 20 3e f7 8f 48 8d b8 b8 00 00 00 48 89 fa 48 c1 ea 03 42 0f b6 14 3a <84> d2 74 06 0f 8e 5f 2b 00 00 0f b6 80 b8 00 00 00 84 c0 74 06 40
RSP: 0018:ffffc90000dc0ae0 EFLAGS: 00000016
RAX: ffffffff8ff78020 RBX: 0000000000000058 RCX: ffffffff815c64fd
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ff780d8
RBP: 0000000000000002 R08: 0000000000000000 R09: ffffffff8ff73a0f
R10: fffffbfff1fee741 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88807624ba00 R14: ffff88807624c460 R15: dffffc0000000000
FS: 00007f0a20825700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2bc21000 CR3: 0000000040b5b000 CR4: 0000000000350ee0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5637 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:661
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:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 2a a1 15 f8 48 89 ef e8 72 17 16 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 b3 df 08 f8 65 8b 05 8c 52 bb 76 85 c0 74 0a 5b 5d c3 e8 c0 d1
RSP: 0018:ffffc90004a6fd80 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1b22029
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff8bba3240 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817def78 R11: 0000000000000000 R12: 1ffff9200094dfbc
R13: 0000000000000000 R14: ffffffff9e4c4974 R15: ffffc90004a6fed0
do_settimeofday64 kernel/time/timekeeping.c:1324 [inline]
do_settimeofday64+0x3d8/0x5c0 kernel/time/timekeeping.c:1293
do_sys_settimeofday64 kernel/time/time.c:195 [inline]
do_sys_settimeofday64+0x1de/0x260 kernel/time/time.c:169
__do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline]
__x64_sys_clock_settime+0x1a1/0x280 kernel/time/posix-timers.c:1067
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: 0033:0x7f0a21eafe99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0a20825168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f0a21fc2f60 RCX: 00007f0a21eafe99
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f0a21f0a031 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff4c47608f R14: 00007f0a20825300 R15: 0000000000022000
rcu: rcu_preempt kthread starved for 10414 jiffies! g204261 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:28688 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 5927 Comm: udevd Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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+0x1b3/0x230 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:481
print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x2125/0x2200 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
__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:638
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x70 kernel/kcov.c:286
Code: b7 c9 48 83 c2 01 48 c7 44 30 e0 02 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 <41> 89 f8 bf 03 00 00 00 4c 8b 14 24 89 f1 65 48 8b 34 25 40 70 02
RSP: 0018:ffffc90005bdfc40 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b9d3fca0 RCX: 0000000000000000
RDX: ffff8880630a1d00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816c3596 R11: 0000000000000000 R12: ffffed10173a7f95
R13: 0000000000000001 R14: ffff8880b9d3fca8 R15: 0000000000000001
csd_lock_wait kernel/smp.c:440 [inline]
smp_call_function_many_cond+0x476/0xc20 kernel/smp.c:969
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
kill_bdev block/bdev.c:77 [inline]
blkdev_flush_mapping+0x185/0x3c0 block/bdev.c:661
blkdev_put_whole block/bdev.c:692 [inline]
blkdev_put+0x727/0x980 block/bdev.c:957
blkdev_close+0x6a/0x80 block/fops.c:516
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f04c6550fc3
Code: 48 ff ff ff b8 ff ff ff ff e9 3e ff ff ff 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
RSP: 002b:00007ffc7a2a0198 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f04c63f96a8 RCX: 00007f04c6550fc3
RDX: 000000000000001c RSI: 00007ffc7a29f998 RDI: 0000000000000008
RBP: 000055c79612df00 R08: 0000000000000007 R09: 000055c79611ba60
R10: 000000000186db7a R11: 0000000000000246 R12: 0000000000000002
R13: 000055c796114640 R14: 0000000000000008 R15: 000055c7960fa910
----------------
Code disassembly (best guess):
0: 01 f8 add %edi,%eax
2: 48 89 44 24 60 mov %rax,0x60(%rsp)
7: eb 66 jmp 0x6f
9: 48 8d 04 5b lea (%rbx,%rbx,2),%rax
d: 48 c1 e0 06 shl $0x6,%rax
11: 48 05 20 3e f7 8f add $0xffffffff8ff73e20,%rax
17: 48 8d b8 b8 00 00 00 lea 0xb8(%rax),%rdi
1e: 48 89 fa mov %rdi,%rdx
21: 48 c1 ea 03 shr $0x3,%rdx
25: 42 0f b6 14 3a movzbl (%rdx,%r15,1),%edx
* 2a: 84 d2 test %dl,%dl <-- trapping instruction
2c: 74 06 je 0x34
2e: 0f 8e 5f 2b 00 00 jle 0x2b93
34: 0f b6 80 b8 00 00 00 movzbl 0xb8(%rax),%eax
3b: 84 c0 test %al,%al
3d: 74 06 je 0x45
3f: 40 rex