------------[ cut here ]------------
WARNING: CPU: 0 PID: 16056 at kernel/rcu/tree_stall.h:1050 rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:1050
Modules linked in:
CPU: 0 UID: 0 PID: 16056 Comm: syz.6.2350 Not tainted 6.16.0-syzkaller-11241-g186f3edfdd41 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:1050
Code: 88 61 01 00 00 be 04 00 00 00 48 c7 c7 00 10 e5 9a e8 e0 a8 80 00 b8 01 00 00 00 87 05 c5 e2 43 19 85 c0 0f 85 3d 01 00 00 90 <0f> 0b 90 48 c7 c3 64 05 ab 90 48 81 fd 40 bf 5c 8e 74 5a 48 b8 00
RSP: 0018:ffffc90000007df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff81a12d30
RDX: fffffbfff35ca200 RSI: 0000000000000004 RDI: ffffffff9ae51000
RBP: ffffffff8e5cbf40 R08: 0000000000000001 R09: fffffbfff35ca200
R10: 0000000000000003 R11: 0000000000000000 R12: 1ffffffff1c42240
R13: 0000000000000246 R14: ffffffff8e5cbf40 R15: ffff8880b843b312
FS:  0000555563d65500(0000) GS:ffff8881246c8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30720220 CR3: 0000000077c79000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:1013 [inline]
 rcu_core+0x4cf/0x1530 kernel/rcu/tree.c:2856
 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 fa a1 02 f6 48 89 df e8 e2 f5 02 f6 e8 dd 47 2e f6 fb bf 01 00 00 00 <e8> f2 f2 f2 f5 65 8b 05 9b 61 40 08 85 c0 74 06 5b e9 41 4d 00 00
RSP: 0018:ffffc9000522fcd8 EFLAGS: 00000206
RAX: 000000001a65178b RBX: ffff888030430000 RCX: ffffffff81c3655f
RDX: 0000000000000000 RSI: ffffffff8de4c8fd RDI: 0000000000000001
RBP: ffff888030430200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90aad397 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000011 R14: 0000000000000200 R15: ffff888030430000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1e6c/0x26d0 kernel/signal.c:3037
 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6aadb8eb72
Code: 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 0f 1f 84
RSP: 002b:00007ffe01fc94b8 EFLAGS: 00000202
RAX: fffffffffffffffc RBX: 00000000000cb7e8 RCX: 00007f6aadb8eb69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6aaddb5fac
RBP: 0000000000000032 R08: 00007f6aae9e5000 R09: 0000001301fc97af
R10: 00007ffe01fc95b0 R11: 0000000000000246 R12: 00007f6aaddb5fac
R13: 00007ffe01fc95b0 R14: 00000000000cb81a R15: 00007ffe01fc95d0
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	f3 0f 1e fa          	endbr64
   5:	53                   	push   %rbx
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 fa a1 02 f6       	call   0xf602a211
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 e2 f5 02 f6       	call   0xf602f601
  1f:	e8 dd 47 2e f6       	call   0xf62e4801
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 f2 f2 f2 f5       	call   0xf5f2f321 <-- trapping instruction
  2f:	65 8b 05 9b 61 40 08 	mov    %gs:0x840619b(%rip),%eax        # 0x84061d1
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5b                   	pop    %rbx
  3b:	e9 41 4d 00 00       	jmp    0x4d81