rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (9838 ticks this GP) idle=403c/1/0x4000000000000000 softirq=24061/24068 fqs=4997 rcu: hardirqs softirqs csw/system rcu: number: 1552372 18 0 rcu: cputime: 24189 28290 34 ==> 52480(ms) rcu: (t=10500 jiffies g=26049 q=3418 ncpus=2) CPU: 1 PID: 8546 Comm: syz.3.815 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194 Code: 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 01 fb bf 01 00 00 00 ab c8 ca f6 65 8b 05 3c f0 71 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc900001f09c0 EFLAGS: 00000206 RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: 11f24bb3a90be500 RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001 RBP: ffffc900001f0a50 R08: ffffffff911cc5e7 R09: 1ffffffff22398bc R10: dffffc0000000000 R11: fffffbfff22398bd R12: dffffc0000000000 R13: ffff88805f2b7c08 R14: ffffffff9748af48 R15: 1ffff9200003e138 FS: 00007f2685bf66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055555e78f4e8 CR3: 000000001a298000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: debug_object_assert_init+0x1f1/0x2f0 lib/debugobjects.c:900 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __mod_timer+0x55/0xdb0 kernel/time/timer.c:1020 mrp_periodic_timer_arm net/802/mrp.c:617 [inline] mrp_periodic_timer+0x1c9/0x210 net/802/mrp.c:629 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x542/0x800 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5255 Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 60 54 34 09 e8 3b 2e 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc9000417f7d8 EFLAGS: 00000286 RAX: 11f24bb3a90be500 RBX: 0000000000000000 RCX: 11f24bb3a90be500 RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9a20 RBP: ffffc9000417f830 R08: ffffffff911cc53f R09: 1ffffffff22398a7 R10: dffffc0000000000 R11: fffffbfff22398a8 R12: ffff88807d991e00 R13: dffffc0000000000 R14: ffff88801ca4bc00 R15: ffff8880b8f3cac8 context_switch kernel/sched/core.c:5384 [inline] __schedule+0x155b/0x45a0 kernel/sched/core.c:6700 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:perf_trace_init+0x1a2/0x2d0 kernel/trace/trace_event_perf.c:222 Code: b4 87 03 00 84 c0 0f 85 9c 00 00 00 e8 97 e0 f7 ff 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 d1 1f 50 00 48 8b 1b <48> 81 fb c0 82 18 8d 74 45 e8 70 e0 f7 ff e9 d1 fe ff ff 44 89 e1 RSP: 0018:ffffc9000417fbc0 EFLAGS: 00000246 RAX: 1ffffffff1cc32ec RBX: ffffffff8e6195c0 RCX: ffff88807d991e00 RDX: 0000000000000000 RSI: 0000000000000ddc RDI: 0000000000000128 RBP: 0000000000000002 R08: ffffffff8e8b502f R09: 1ffffffff1d16a05 R10: dffffc0000000000 R11: fffffbfff1d16a06 R12: 0000000000000ddc R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000128 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10236 perf_try_init_event+0x12b/0x3c0 kernel/events/core.c:11860 perf_init_event kernel/events/core.c:11930 [inline] perf_event_alloc+0xfa4/0x21b0 kernel/events/core.c:12211 __do_sys_perf_event_open kernel/events/core.c:12718 [inline] __se_sys_perf_event_open+0x740/0x1c50 kernel/events/core.c:12609 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f268799ce59 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:00007f2685bf6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f2687c15fa0 RCX: 00007f268799ce59 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000500 RBP: 00007f2687a32d6f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2687c16038 R14: 00007f2687c15fa0 R15: 00007ffdee2a0768