------------[ cut here ]------------
WARNING: CPU: 0 PID: 9202 at kernel/rcu/tree_stall.h:970 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:962
Modules linked in:
CPU: 0 PID: 9202 Comm: syz.0.1304 Not tainted 6.1.135-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:970
Code: ff ff ff 48 c7 c7 00 2f a0 96 be 04 00 00 00 e8 0a aa 66 00 48 89 df b8 01 00 00 00 87 05 8c a5 34 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 40 ff 92 8c 74 47 48 c7 c0 24 af fe 8d 48 c1 e8 03
RSP: 0018:ffffc90000007b78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8c92ff40 RCX: ffffffff816b8966
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8c92ff40
RBP: ffffc90000007df0 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff2d405e0 R11: 1ffffffff2d405e0 R12: 0000000000002904
R13: dffffc0000000000 R14: 0000000000000a06 R15: dffffc0000000000
FS:  00007f2810c806c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 000000001ffcc000 CR4: 00000000003506f0
DR0: 0000000000000007 DR1: 0000000000000002 DR2: 0000000000000008
DR3: 0000000000000006 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x5d9/0x16a0 kernel/rcu/tree.c:2552
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:661
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: f5 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4e 5b 4a f7 48 89 df e8 a6 20 4b f7 e8 b1 22 6e f7 fb bf 01 00 00 00 <e8> b6 9d 3e f7 65 8b 05 b7 72 e9 75 85 c0 74 02 5b c3 e8 04 84 e7
RSP: 0018:ffffc9001b9b7bb8 EFLAGS: 00000286
RAX: 98fcabc279375c00 RBX: ffff88802f1d2500 RCX: 98fcabc279375c00
RDX: dffffc0000000000 RSI: ffffffff8a6bff00 RDI: 0000000000000001
RBP: ffff88802f1d2998 R08: dffffc0000000000 R09: ffffed1005e3a4a1
R10: ffffed1005e3a4a1 R11: 1ffff11005e3a4a0 R12: 1ffff11005e3a533
R13: 0000000000000021 R14: dffffc0000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1163/0x1350 kernel/signal.c:2874
 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f280fd8e967
Code: ff ff 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
RSP: 002b:00007f2810c800e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f280ffb5fa8 RCX: 00007f280fd8e969
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f280ffb5fa8
RBP: 00007f280ffb5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f280ffb5fac
R13: 0000000000000000 R14: 00007ffd386cc8e0 R15: 00007ffd386cc9c8
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	0f 1f 00             	nopl   (%rax)
   3:	53                   	push   %rbx
   4:	48 89 fb             	mov    %rdi,%rbx
   7:	48 83 c7 18          	add    $0x18,%rdi
   b:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  10:	e8 4e 5b 4a f7       	call   0xf74a5b63
  15:	48 89 df             	mov    %rbx,%rdi
  18:	e8 a6 20 4b f7       	call   0xf74b20c3
  1d:	e8 b1 22 6e f7       	call   0xf76e22d3
  22:	fb                   	sti
  23:	bf 01 00 00 00       	mov    $0x1,%edi
* 28:	e8 b6 9d 3e f7       	call   0xf73e9de3 <-- trapping instruction
  2d:	65 8b 05 b7 72 e9 75 	mov    %gs:0x75e972b7(%rip),%eax        # 0x75e972eb
  34:	85 c0                	test   %eax,%eax
  36:	74 02                	je     0x3a
  38:	5b                   	pop    %rbx
  39:	c3                   	ret
  3a:	e8                   	.byte 0xe8
  3b:	04 84                	add    $0x84,%al
  3d:	e7                   	.byte 0xe7