rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (0 ticks this GP) idle=722c/1/0x4000000000000000 softirq=167804/167804 fqs=2096
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  9518244          0            0
rcu: 	cputime:    25389          0            0   ==> 52500(ms)
rcu: 	(detected by 1, t=10502 jiffies, g=219013, q=3437 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8036 Comm: syz.0.9051 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:126 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:133 [inline]
RIP: 0010:__raw_read_unlock_irqrestore include/linux/rwlock_api_smp.h:241 [inline]
RIP: 0010:_raw_read_unlock_irqrestore+0xa3/0x120 kernel/locking/spinlock.c:268
Code: f7 c3 00 02 00 00 74 05 e8 0a ca ff f6 48 b8 04 00 00 00 00 fc ff df 41 c6 04 07 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 <f7> 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74
RSP: 0000:ffffc90000007d80 EFLAGS: 00000046
RAX: dffffc0000000004 RBX: 0000000000000802 RCX: ffffffff81695d6d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88802420bb28
RBP: ffffc90000007e10 R08: ffff88802420bb2b R09: 1ffff11004841765
R10: dffffc0000000000 R11: ffffed1004841766 R12: dffffc0000000000
R13: ffff88802fb6ed80 R14: ffff88802420bb28 R15: 1ffff92000000fb0
FS:  00007f8c17c296c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c330332 CR3: 0000000024a7d000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 kill_fasync_rcu fs/fcntl.c:999 [inline]
 kill_fasync+0x233/0x4b0 fs/fcntl.c:1011
 perf_event_wakeup+0x2ee/0x380 kernel/events/core.c:6788
 perf_pending_irq+0x176/0x620 kernel/events/core.c:6884
 irq_work_single+0xd5/0x230 kernel/irq_work.c:221
 irq_work_run_list kernel/irq_work.c:252 [inline]
 irq_work_run+0x15d/0x2f0 kernel/irq_work.c:261
 __sysvec_irq_work+0x98/0x370 arch/x86/kernel/irq_work.c:22
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9c/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0010:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 01 48 d0 f6 e8 3c 34 01 f7 fb bf 01 00 00 00 <e8> 31 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0000:ffffc90004befda0 EFLAGS: 00000286
RAX: c1e5a503efe04d00 RBX: 0000000000000000 RCX: c1e5a503efe04d00
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: 0000000000000001
RBP: ffffc90004befe50 R08: ffffffff8e8ae5ef R09: 1ffffffff1d15cbd
R10: dffffc0000000000 R11: fffffbfff1d15cbe R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200097dfb4
 irqentry_exit+0x67/0x70 kernel/entry/common.c:438
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:exit_to_user_mode_loop+0x40/0x110 kernel/entry/common.c:164
Code: fb eb 1d e8 02 49 10 09 65 48 8b 05 0a 14 90 7e 4c 8b 30 41 f7 c6 0e 30 02 00 0f 84 c4 00 00 00 e8 c5 af 19 00 fb 41 f6 c6 08 <74> 05 e8 19 76 18 09 41 f7 c6 00 10 00 00 74 08 48 89 df e8 b8 a0
RSP: 0000:ffffc90004beff10 EFLAGS: 00000202
RAX: c1e5a503efe04d00 RBX: ffffc90004beff58 RCX: c1e5a503efe04d00
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: ffffffff8b1c7be0
RBP: 0000000000000000 R08: ffffffff8e8ae5ef R09: 1ffffffff1d15cbd
R10: dffffc0000000000 R11: fffffbfff1d15cbe R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000008 R15: ffff88807b62da00
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 irqentry_exit_to_user_mode+0x9/0x30 kernel/entry/common.c:315
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0033:0x7f8c16d9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8c17c29028 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f8c17015fa0 RCX: 00007f8c16d9ce59
RDX: 00002000000006c0 RSI: 0000000000005452 RDI: 0000000000000003
RBP: 00007f8c16e32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c17016038 R14: 00007f8c17015fa0 R15: 00007fff4029ac08
 </TASK>