------------[ cut here ]------------
WARNING: CPU: 1 PID: 11079 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: 11079 Comm: syz.2.1033 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1050
Code: ff ff 48 c7 c7 20 74 b0 99 be 04 00 00 00 e8 53 e0 7c 00 4c 89 f7 b8 01 00 00 00 87 05 15 67 09 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 80 f4 13 8e 74 47 48 c7 c0 60 e6 a3 8f 48 c1 e8
RSP: 0018:ffffc90000a08bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a02 RCX: ffffffff81a70cfd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e13f480
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff3360e84 R12: 0000000000002904
R13: 1ffff110170e75f2 R14: ffffffff8e13f480 R15: dffffc0000000000
FS:  00007f39019436c0(0000) GS:ffff888125d11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000078db2000 CR4: 00000000003526f0
DR0: ffff8880b8927a20 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_core+0x5fa/0x1770 kernel/rcu/tree.c:2856
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x4a/0x70 kernel/kcov.c:223
Code: 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 <8b> 89 1c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 c3 cc cc
RSP: 0018:ffffc9000e47f418 EFLAGS: 00000246
RAX: ffffffff81b4665b RBX: 1ffff110170c8341 RCX: ffff88802d8f0000
RDX: ffffc9001bc0a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000e47f5a0 R08: ffffffff8fa3b537 R09: 1ffffffff1f476a6
R10: dffffc0000000000 R11: fffffbfff1f476a7 R12: ffff8880b8641a08
R13: dffffc0000000000 R14: ffff8880b873b1c0 R15: 0000000000000000
 csd_lock_wait kernel/smp.c:342 [inline]
 smp_call_function_many_cond+0xd4b/0x12d0 kernel/smp.c:877
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1044
 on_each_cpu include/linux/smp.h:71 [inline]
 smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2653 [inline]
 smp_text_poke_batch_finish+0x5f9/0x1130 arch/x86/kernel/alternative.c:2863
 __static_call_transform+0x4eb/0x750 arch/x86/kernel/static_call.c:111
 arch_static_call_transform+0x98/0xc0 arch/x86/kernel/static_call.c:-1
 __static_call_update+0xe4/0x5d0 kernel/static_call_inline.c:147
 tracepoint_update_call kernel/tracepoint.c:271 [inline]
 tracepoint_add_func+0x91e/0xa10 kernel/tracepoint.c:312
 tracepoint_probe_register_prio kernel/tracepoint.c:464 [inline]
 tracepoint_probe_register+0x5d/0x90 kernel/tracepoint.c:484
 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline]
 perf_trace_event_init+0x4de/0x9d0 kernel/trace/trace_event_perf.c:202
 perf_trace_init+0x23d/0x2d0 kernel/trace/trace_event_perf.c:226
 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10859
 perf_try_init_event+0x17f/0x870 kernel/events/core.c:12592
 perf_init_event kernel/events/core.c:12690 [inline]
 perf_event_alloc+0x133e/0x2be0 kernel/events/core.c:12965
 __do_sys_perf_event_open kernel/events/core.c:13483 [inline]
 __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13364
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3900b8eec9
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:00007f3901943038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f3900de5fa0 RCX: 00007f3900b8eec9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000200
RBP: 00007f3900c11f91 R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3900de6038 R14: 00007f3900de5fa0 R15: 00007ffc9ee9be18
 </TASK>
----------------
Code disassembly (best guess):
   0:	81 fa 00 01 00 00    	cmp    $0x100,%edx
   6:	75 35                	jne    0x3d
   8:	83 b9 3c 16 00 00 00 	cmpl   $0x0,0x163c(%rcx)
   f:	74 2c                	je     0x3d
  11:	8b 91 18 16 00 00    	mov    0x1618(%rcx),%edx
  17:	83 fa 02             	cmp    $0x2,%edx
  1a:	75 21                	jne    0x3d
  1c:	48 8b 91 20 16 00 00 	mov    0x1620(%rcx),%rdx
  23:	48 8b 32             	mov    (%rdx),%rsi
  26:	48 8d 7e 01          	lea    0x1(%rsi),%rdi
* 2a:	8b 89 1c 16 00 00    	mov    0x161c(%rcx),%ecx <-- trapping instruction
  30:	48 39 cf             	cmp    %rcx,%rdi
  33:	73 08                	jae    0x3d
  35:	48 89 3a             	mov    %rdi,(%rdx)
  38:	48 89 44 f2 08       	mov    %rax,0x8(%rdx,%rsi,8)
  3d:	c3                   	ret
  3e:	cc                   	int3
  3f:	cc                   	int3