------------[ cut here ]------------
WARNING: CPU: 1 PID: 0 at kernel/rcu/tree_stall.h:1001 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 04 33 97 be 04 00 00 00 e8 7a 0d 6e 00 48 89 df b8 01 00 00 00 87 05 6c b6 c1 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 00 70 13 8d 74 47 48 c7 c0 1c a3 8c 8e 48 c1 e8 03
RSP: 0018:ffffc900001f0bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8d137000 RCX: ffffffff81714e26
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8d137000
RBP: ffffc900001f0e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2e66094 R12: 0000000000002904
R13: 1ffff9200003e194 R14: 0000000000000a02 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95a1c61b24 CR3: 0000000059a67000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 rcu_core+0x5ec/0x17f0 kernel/rcu/tree.c:2462
 handle_softirqs+0x27d/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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:pv_native_safe_halt+0xf/0x10 arch/x86/kernel/paravirt.c:148
Code: 7c 1d 02 c3 cc cc cc cc cc cc cc f3 0f 1e fa 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 66 90 0f 00 2d 43 a7 3c 00 fb f4 <c3> 66 0f 1f 00 55 41 57 41 56 41 54 53 50 8b 2f eb 2c 89 cb 80 f9
RSP: 0018:ffffc90000187de0 EFLAGS: 000002c6
RAX: db96c8a670661c00 RBX: ffffffff81628b01 RCX: db96c8a670661c00
RDX: 0000000000000001 RSI: ffffffff8acacb60 RDI: ffffffff8b1cf820
RBP: ffffc90000187f20 R08: ffff8880b8f36bab R09: 1ffff110171e6d75
R10: dffffc0000000000 R11: ffffed10171e6d76 R12: 1ffff92000030fc8
R13: dffffc0000000000 R14: 1ffff110037cd780 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:108 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:753
 default_idle_call+0x6c/0xa0 kernel/sched/idle.c:97
 cpuidle_idle_call kernel/sched/idle.c:178 [inline]
 do_idle+0x221/0x5c0 kernel/sched/idle.c:302
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:401
 start_secondary+0xee/0xf0 arch/x86/kernel/smpboot.c:323
 secondary_startup_64_no_verify+0x179/0x17b
 </TASK>
----------------
Code disassembly (best guess):
   0:	7c 1d                	jl     0x1f
   2:	02 c3                	add    %bl,%al
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	cc                   	int3
   a:	cc                   	int3
   b:	f3 0f 1e fa          	endbr64
   f:	0f 0b                	ud2
  11:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  18:	00 00 00
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 43 a7 3c 00 	verw   0x3ca743(%rip)        # 0x3ca76b
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	c3                   	ret <-- trapping instruction
  2b:	66 0f 1f 00          	nopw   (%rax)
  2f:	55                   	push   %rbp
  30:	41 57                	push   %r15
  32:	41 56                	push   %r14
  34:	41 54                	push   %r12
  36:	53                   	push   %rbx
  37:	50                   	push   %rax
  38:	8b 2f                	mov    (%rdi),%ebp
  3a:	eb 2c                	jmp    0x68
  3c:	89 cb                	mov    %ecx,%ebx
  3e:	80                   	.byte 0x80
  3f:	f9                   	stc