rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2638 jiffies s: 66717 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 21673 Comm: syz.1.5343 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:unwind_next_frame+0x6d8/0x20b0 arch/x86/kernel/unwind_orc.c:-1
Code: c0 0f 84 83 02 00 00 44 89 f9 80 e1 07 38 c1 0f 8c 75 02 00 00 be 02 00 00 00 49 89 d6 4c 89 ff e8 bd 3e 9a 00 e9 3b 18 00 00 <48> 8b 44 24 50 42 80 3c 28 00 4c 8b 74 24 58 74 08 4c 89 f7 e8 df
RSP: 0018:ffffc900000071a8 EFLAGS: 00000097
RAX: 0000000000000015 RBX: ffffc90000007340 RCX: ffffffff8e2f02b8
RDX: ffffffff8e9e7060 RSI: ffffffff8e2f0294 RDI: 0000000000000001
RBP: ffffffff8e9e7094 R08: 0000000000000009 R09: ffffc90000007340
R10: dffffc0000000000 R11: fffff52000000e74 R12: ffffffff8e9e7090
R13: dffffc0000000000 R14: ffffffff8e2f02b4 R15: 0000000000000005
FS: 00007f1adbb1a6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555697b14e8 CR3: 000000001ee6f000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__unwind_start+0x5bb/0x740 arch/x86/kernel/unwind_orc.c:717
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
perf_callchain_kernel+0x29e/0x680 arch/x86/events/core.c:-1
get_perf_callchain+0x236/0x490 kernel/events/callchain.c:204
perf_callchain kernel/events/core.c:7512 [inline]
perf_prepare_sample+0x399/0x2020 kernel/events/core.c:7545
__perf_event_output kernel/events/core.c:7730 [inline]
perf_event_output_forward+0x197/0x2f0 kernel/events/core.c:7750
__perf_event_overflow+0x448/0x610 kernel/events/core.c:9496
perf_tp_event+0x38c/0xc00 kernel/events/core.c:10029
perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 33 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007c20 EFLAGS: 00000206
RAX: e85c4dd6edcea400 RBX: 1ffff92000000f8c RCX: e85c4dd6edcea400
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0f60
RBP: ffffc90000007d08 R08: ffffffff90af633f R09: 1ffffffff215ec67
R10: dffffc0000000000 R11: fffffbfff215ec68 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
rebalance_domains+0x8da/0xa10 kernel/sched/fair.c:11057
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:raw_spin_rq_unlock_irq+0x13/0x90 kernel/sched/sched.h:1375
Code: 7c d2 e8 f0 59 78 00 eb cb 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 53 66 90 e8 a4 19 dc 08 e8 df d7 2d 00 fb 5b <41> 5e 41 5f c3 49 be 00 00 00 00 00 fc ff df 49 89 ff 48 8d 9f 58
RSP: 0018:ffffc900031b7808 EFLAGS: 00000286
RAX: e85c4dd6edcea400 RBX: ffff8880b8e3ab00 RCX: e85c4dd6edcea400
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0f60
RBP: ffffc900031b79b0 R08: ffffffff90af633f R09: 1ffffffff215ec67
R10: dffffc0000000000 R11: fffffbfff215ec68 R12: ffff888075cc1dc0
R13: ffff888075cc1dc0 R14: 1ffff1100eb9840a R15: dffffc0000000000
__schedule+0x13ec/0x40e0 kernel/sched/core.c:6568
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__sanitizer_cov_trace_pc+0x3e/0x60 kernel/kcov.c:221
Code: e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 <48> 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48
RSP: 0018:ffffc900031b7b38 EFLAGS: 00000246
RAX: ffffffff8177699e RBX: 0000000000000000 RCX: ffff888075cc1dc0
RDX: ffffc9000eaea000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900031b7c30 R08: ffffffff90af633f R09: 1ffffffff215ec67
R10: dffffc0000000000 R11: fffffbfff215ec68 R12: 0000000000000000
R13: 1ffff92000636f71 R14: dffffc0000000000 R15: 1ffff92000636f6c
smp_call_function_single+0x48e/0x5a0 kernel/smp.c:789
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5c7/0x920 kernel/events/core.c:2941
__do_sys_perf_event_open kernel/events/core.c:12784 [inline]
__se_sys_perf_event_open+0x1287/0x1ec0 kernel/events/core.c:12378
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1adab9c799
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:00007f1adbb1a028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f1adae16090 RCX: 00007f1adab9c799
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0
RBP: 00007f1adac32c99 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1adae16128 R14: 00007f1adae16090 R15: 00007ffce330e588