------------[ cut here ]------------
WARNING: CPU: 1 PID: 8192 at kernel/rcu/tree_stall.h:970 rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:955
Modules linked in:
CPU: 1 PID: 8192 Comm: syz.0.757 Not tainted 6.1.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:970
Code: c7 c7 40 7f f7 91 be 04 00 00 00 e8 12 2b 6e 00 b8 01 00 00 00 87 05 d7 89 83 10 85 c0 0f 85 1c ff ff ff 48 c7 c0 40 fe 32 8d <0f> 0b 49 39 c7 74 47 48 c7 c0 a4 08 9a 8e 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc900001e0b98 EFLAGS: 00010046
RAX: ffffffff8d32fe40 RBX: 0000000100007ffa RCX: ffffffff8173f55e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff91f77f40
RBP: ffffc900001e0df0 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880b993b892 R14: 0000000000000246 R15: ffffffff8d32fe40
FS:  00007fbcadf6d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000059c7c000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x699/0x1810 kernel/rcu/tree.c:2551
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
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: d1 9d f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0e cb ba f6 48 89 df e8 76 08 bc f6 e8 f1 98 e1 f6 fb bf 01 00 00 00 <e8> f6 98 ae f6 65 8b 05 97 a1 52 75 85 c0 74 02 5b c3 e8 44 c5 50
RSP: 0018:ffffc900126a7b30 EFLAGS: 00000286
RAX: e6e3d7c125e71600 RBX: ffff888027643780 RCX: ffffffff91f33103
RDX: dffffc0000000000 RSI: ffffffff8b0c0260 RDI: 0000000000000001
RBP: ffffc900126a7c70 R08: dffffc0000000000 R09: ffffed1004ec86f1
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11004ec8783
R13: 000000001c000004 R14: 0000000000000021 R15: ffff888027643c18
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x154b/0x17d0 kernel/signal.c:2873
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 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+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbcad179e77
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:00007fbcadf6d0e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fbcad315f88 RCX: 00007fbcad179e79
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbcad315f88
RBP: 00007fbcad315f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbcad315f8c
R13: 0000000000000000 R14: 00007fffc1da7ac0 R15: 00007fffc1da7ba8
 </TASK>
----------------
Code disassembly (best guess):
   0:	d1 9d f5 ff 90 53    	rcrl   0x5390fff5(%rbp)
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 0e cb ba f6       	call   0xf6bacb25
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 76 08 bc f6       	call   0xf6bc0895
  1f:	e8 f1 98 e1 f6       	call   0xf6e19915
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 f6 98 ae f6       	call   0xf6ae9925 <-- trapping instruction
  2f:	65 8b 05 97 a1 52 75 	mov    %gs:0x7552a197(%rip),%eax        # 0x7552a1cd
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	44                   	rex.R
  3e:	c5                   	.byte 0xc5
  3f:	50                   	push   %rax