------------[ cut here ]------------
WARNING: CPU: 1 PID: 6376 at kernel/rcu/tree_stall.h:1050 rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1050
Modules linked in:
CPU: 1 UID: 0 PID: 6376 Comm: syz.2.125 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1050
Code: ff ff 48 c7 c7 80 c4 7d 99 be 04 00 00 00 e8 c3 23 7f 00 4c 89 f7 b8 01 00 00 00 87 05 25 da d6 17 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 40 29 f4 8d 74 47 48 c7 c0 90 10 7d 8f 48 c1 e8
RSP: 0018:ffffc90000a08bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a02 RCX: ffffffff81a6ea4d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8df42940
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff32fb890 R12: 0000000000002904
R13: 1ffff110171275f2 R14: ffffffff8df42940 R15: dffffc0000000000
FS: 000055558134d500(0000) GS:ffff88812623b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000461000 CR3: 000000003036a000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
rcu_core+0x5fa/0x1770 kernel/rcu/tree.c:2856
handle_softirqs+0x286/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xd3c/0x12d0 kernel/smp.c:877
Code: 01 31 ff e8 b6 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 6f 0b 00 eb 38 f3 90 42 0f b6 04 2b 84 c0 75 11 <41> f7 04 24 01 00 00 00 74 1e e8 45 6f 0b 00 eb e4 44 89 e1 80 e1
RSP: 0018:ffffc900052b78a0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff11017108431 RCX: ffff888055488000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900052b7a20 R08: ffffffff8f7ce077 R09: 1ffffffff1ef9c0e
R10: dffffc0000000000 R11: fffffbfff1ef9c0f R12: ffff8880b8842188
R13: dffffc0000000000 R14: ffff8880b893b1c0 R15: 0000000000000000
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2713 [inline]
smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2923
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
static_key_disable_cpuslocked+0xc5/0x1b0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
tracepoint_remove_func kernel/tracepoint.c:370 [inline]
tracepoint_probe_unregister+0x80e/0x9b0 kernel/tracepoint.c:504
trace_event_reg+0x153/0x270 kernel/trace/trace_events.c:-1
perf_trace_event_unreg+0xb9/0x1b0 kernel/trace/trace_event_perf.c:162
perf_trace_destroy+0xa4/0x150 kernel/trace/trace_event_perf.c:241
__free_event+0x346/0x7e0 kernel/events/core.c:5613
put_event kernel/events/core.c:5756 [inline]
perf_event_release_kernel+0x45b/0x510 kernel/events/core.c:5866
perf_release+0x38/0x50 kernel/events/core.c:5876
__fput+0x44c/0xa70 fs/file_table.c:468
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd8c458f6c9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff13800178 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd8c47e7da0 RCX: 00007fd8c458f6c9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd8c47e7da0 R08: 00000000000000fc R09: 0000000e1380046f
R10: 00007fd8c47e7cb0 R11: 0000000000000246 R12: 0000000000018416
R13: 00007fd8c47e6090 R14: ffffffffffffffff R15: 00007fff13800290
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 31 ff xor %edi,%edi
2: e8 b6 73 0b 00 call 0xb73bd
7: 41 83 e5 01 and $0x1,%r13d
b: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13
12: fc ff df
15: 75 07 jne 0x1e
17: e8 61 6f 0b 00 call 0xb6f7d
1c: eb 38 jmp 0x56
1e: f3 90 pause
20: 42 0f b6 04 2b movzbl (%rbx,%r13,1),%eax
25: 84 c0 test %al,%al
27: 75 11 jne 0x3a
* 29: 41 f7 04 24 01 00 00 testl $0x1,(%r12) <-- trapping instruction
30: 00
31: 74 1e je 0x51
33: e8 45 6f 0b 00 call 0xb6f7d
38: eb e4 jmp 0x1e
3a: 44 89 e1 mov %r12d,%ecx
3d: 80 .byte 0x80
3e: e1 .byte 0xe1