------------[ cut here ]------------
WARNING: CPU: 1 PID: 7160 at kernel/rcu/tree_stall.h:937 rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:922
Modules linked in:
CPU: 1 PID: 7160 Comm: syz.0.1020 Not tainted 5.15.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:937
Code: c7 c7 60 5c 43 91 be 04 00 00 00 e8 22 93 5e 00 b8 01 00 00 00 87 05 a7 c4 d7 0f 85 c0 0f 85 1c ff ff ff 48 c7 c0 80 3a 92 8c <0f> 0b 49 39 c7 74 47 48 c7 c0 c4 9f e4 8d 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc90000dd0bd8 EFLAGS: 00010046
RAX: ffffffff8c923a80 RBX: 00000001000005a9 RCX: ffffffff816b97ae
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff91435c60
RBP: ffffc90000dd0e10 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8c923a80
FS:  0000555556e5b500(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c322029 CR3: 000000006736a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 000000000000000a DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x657/0x1650 kernel/rcu/tree.c:2758
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 21 80 f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 be 11 3b f7 48 89 df e8 96 65 3c f7 e8 b1 1d 5f f7 fb bf 01 00 00 00 <e8> d6 ab 2f f7 65 8b 05 57 b2 da 75 85 c0 74 02 5b c3 e8 24 cf d8
RSP: 0018:ffffc90002ef7bc0 EFLAGS: 00000282
RAX: 061bb82f85f93400 RBX: ffff8880654adc80 RCX: ffffffff913f0f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8186db40 R09: ffffed100ca95b91
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021
R13: dffffc0000000000 R14: ffff8880654ae118 R15: ffff8880654adc80
 spin_unlock_irq include/linux/spinlock.h:413 [inline]
 get_signal+0x13ee/0x14e0 kernel/signal.c:2892
 arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f630ce84b9f
Code: 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 83 c8 ff c3 66 2e
RSP: 002b:00007ffda3cf1bb8 EFLAGS: 00000202
RAX: fffffffffffffffc RBX: 0000000000033838 RCX: 00007f630ce84b99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f630d012fac
RBP: 0000000000033806 R08: 0000000000000010 R09: 00000011a3cf1ecf
R10: 00007ffda3cf1ca0 R11: 0000000000000246 R12: 00007f630d012fac
R13: 0000000000000032 R14: 00007ffda3cf1cc0 R15: 00007ffda3cf1ca0
 </TASK>
----------------
Code disassembly (best guess):
   0:	21 80 f6 ff 90 53    	and    %eax,0x5390fff6(%rax)
   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 be 11 3b f7       	call   0xf73b11d5
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 96 65 3c f7       	call   0xf73c65b5
  1f:	e8 b1 1d 5f f7       	call   0xf75f1dd5
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 d6 ab 2f f7       	call   0xf72fac05 <-- trapping instruction
  2f:	65 8b 05 57 b2 da 75 	mov    %gs:0x75dab257(%rip),%eax        # 0x75dab28d
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	24 cf                	and    $0xcf,%al
  3f:	d8                   	.byte 0xd8