rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (1 GPs behind) idle=ca1/1/0x4000000000000000 softirq=98668/98669 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P16877/1:b..l
(detected by 0, t=10506 jiffies, g=137217, q=33)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 22325 Comm: syz-executor.5 Not tainted 5.18.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0xdb/0x180 mm/kasan/generic.c:189
Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c
RSP: 0018:ffffc900003f8c50 EFLAGS: 00000082
RAX: fffff5200007f193 RBX: fffff5200007f194 RCX: ffffffff815d57a0
RDX: fffff5200007f194 RSI: 0000000000000004 RDI: ffffc900003f8c98
RBP: fffff5200007f193 R08: 0000000000000001 R09: ffffc900003f8c9b
R10: fffff5200007f193 R11: 0000000000000001 R12: ffffffff90829698
R13: ffffffff908296a0 R14: 1ffff9200007f1a7 R15: ffffffff89ce4860
FS: 0000555555662400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f5139c028 CR3: 0000000078ebd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:542 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
do_raw_spin_lock+0x120/0x2a0 kernel/locking/spinlock_debug.c:115
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0x41/0x50 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:645
RIP: 0010:filp_close+0x41/0x160 fs/open.c:1317
Code: 00 00 00 4c 89 ef e8 7e 91 f3 ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 11 01 00 00 48 8b 5d 70 <31> ff 48 89 de e8 45 9a a8 ff 48 85 db 0f 84 0a ab 5a 07 e8 a7 97
RSP: 0018:ffffc90004da7ee8 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000019 RCX: ffffffff81cfddb2
RDX: 1ffff11004715866 RSI: 0000000000000008 RDI: ffff8880238ac330
RBP: ffff8880238ac2c0 R08: 0000000000000000 R09: ffff8880238ac337
R10: ffffed1004715866 R11: 0000000000000001 R12: ffff88801a5e53c0
R13: ffff8880238ac330 R14: 0000000000000000 R15: 0000000000000000
close_fd+0x6f/0xa0 fs/file.c:671
__do_sys_close fs/open.c:1342 [inline]
__se_sys_close fs/open.c:1340 [inline]
__x64_sys_close+0x2f/0xa0 fs/open.c:1340
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: 0033:0x7f7f5123bd2b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007fff2a8e7b90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 00007f7f5123bd2b
RDX: ffffffffffffffb8 RSI: ffffffffffffffff RDI: 0000000000000014
RBP: 00007f7f5139d960 R08: 0000000000000000 R09: 00007f7f513a0348
R10: 00007fff2a8e7c90 R11: 0000000000000293 R12: 0000000000140c37
R13: 00007fff2a8e7c90 R14: 00007f7f5139bf60 R15: 0000000000000032
task:kworker/u4:20 state:R running task stack:26872 pid:16877 ppid: 2 flags:0x00004000
Workqueue: bat_events batadv_nc_worker
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6696
irqentry_exit+0x31/0x80 kernel/entry/common.c:428
asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:lock_acquire+0x69/0x510 kernel/locking/lockdep.c:5609
Code: 03 48 c7 44 24 18 35 6e 5c 8b 48 01 d8 48 c7 44 24 20 70 e2 5c 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 00 00 c7 40 08 00 00 00 f3 40 0c f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 a8 00
RSP: 0018:ffffc90004477b98 EFLAGS: 00000282
RAX: fffff5200088ef75 RBX: 1ffff9200088ef75 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8bd7f5e0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff890773f1 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bd7f5e0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:719
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
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g137217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=60317
rcu: rcu_preempt kthread starved for 10506 jiffies! g137217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28448 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 0
CPU: 0 PID: 22053 Comm: udevd Not tainted 5.18.0-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+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:ffffc900034efbc8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9d3f7a0 RCX: 0000000000000000
RDX: ffff88802670a140 RSI: ffffffff816ca537 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816ca55d R11: 0000000000000000 R12: ffffed10173a7ef5
R13: 0000000000000001 R14: 0000000000000001 R15: dffffc0000000000
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
kill_bdev block/bdev.c:76 [inline]
blkdev_flush_mapping+0x185/0x3c0 block/bdev.c:656
blkdev_put_whole block/bdev.c:687 [inline]
blkdev_put+0x706/0x950 block/bdev.c:947
blkdev_close+0x64/0x80 block/fops.c:512
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fefda98cfc3
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:00007ffffd1cbe18 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007fefda8916a8 RCX: 00007fefda98cfc3
RDX: 000000000000001c RSI: 00007ffffd1cb618 RDI: 0000000000000008
RBP: 00005600ce7f5fe0 R08: 0000000000000007 R09: 00005600ce7f7c40
R10: 00007fefdaa1bfc0 R11: 0000000000000246 R12: 0000000000000002
R13: 00005600ce7e0a20 R14: 0000000000000008 R15: 00005600ce7c22c0
----------------
Code disassembly (best guess):
0: 80 38 00 cmpb $0x0,(%rax)
3: 74 f2 je 0xfffffff7
5: 48 89 c2 mov %rax,%rdx
8: b8 01 00 00 00 mov $0x1,%eax
d: 48 85 d2 test %rdx,%rdx
10: 75 56 jne 0x68
12: 5b pop %rbx
13: 5d pop %rbp
14: 41 5c pop %r12
16: c3 retq
17: 48 85 d2 test %rdx,%rdx
1a: 74 5e je 0x7a
1c: 48 01 ea add %rbp,%rdx
1f: eb 09 jmp 0x2a
21: 48 83 c0 01 add $0x1,%rax
25: 48 39 d0 cmp %rdx,%rax
28: 74 50 je 0x7a
* 2a: 80 38 00 cmpb $0x0,(%rax) <-- trapping instruction
2d: 74 f2 je 0x21
2f: eb d4 jmp 0x5
31: 41 bc 08 00 00 00 mov $0x8,%r12d
37: 48 89 ea mov %rbp,%rdx
3a: 45 29 dc sub %r11d,%r12d
3d: 4d rex.WRB
3e: 8d .byte 0x8d
3f: 1c .byte 0x1c