------------[ cut here ]------------
WARNING: CPU: 0 PID: 5827 at kernel/rcu/tree_stall.h:989 rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:989
Modules linked in:
CPU: 0 UID: 0 PID: 5827 Comm: syz-executor Not tainted 6.13.0-rc2-syzkaller-00292-ga446e965a188 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:989
Code: 88 61 01 00 00 be 04 00 00 00 48 c7 c7 60 59 84 9a e8 00 e1 7b 00 b8 01 00 00 00 87 05 45 4d 04 19 85 c0 0f 85 3d 01 00 00 90 <0f> 0b 90 48 81 fd c0 66 1c 8e 48 c7 c3 54 73 5f 90 74 5a 48 b8 00
RSP: 0018:ffffc90000007df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff81800c10
RDX: fffffbfff3508b2c RSI: 0000000000000004 RDI: ffffffff9a845960
RBP: ffffffff8e1c66c0 R08: 0000000000000001 R09: fffffbfff3508b2c
R10: 0000000000000003 R11: 0000000000000001 R12: 1ffffffff1bc2040
R13: 0000000000000246 R14: ffffffff8e1c66c0 R15: ffff8880b863fcd2
FS:  0000555566816500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f604ff8 CR3: 00000000608c2000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:952 [inline]
 rcu_core+0x4d0/0x14d0 kernel/rcu/tree.c:2818
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x458/0x1300 kernel/smp.c:884
Code: 0c 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 2a 0e 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 a7 0c 00 00 8b 43 08 31
RSP: 0018:ffffc9000440fc48 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b8744b80 RCX: ffffffff818df4ec
RDX: ffff8880302e8000 RSI: ffffffff818df4c6 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffed10170e8971
R13: 0000000000000001 R14: ffff8880b8744b88 R15: ffff8880b863ff80
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051
 kill_bdev block/bdev.c:90 [inline]
 blkdev_flush_mapping+0xf1/0x290 block/bdev.c:671
 blkdev_put_whole+0xc4/0xf0 block/bdev.c:678
 bdev_release+0x47e/0x6d0 block/bdev.c:1103
 blkdev_release+0x15/0x20 block/fops.c:635
 __fput+0x3fb/0xb60 fs/file_table.c:450
 task_work_run+0x151/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d43387047
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffdf94fde18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6d43387047
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdf94fded0
RBP: 00007ffdf94fded0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdf94fef50
R13: 00007f6d4340180c R14: 00007ffdf94fef90 R15: 000000000000026e
 </TASK>
----------------
Code disassembly (best guess):
   0:	0c 00                	or     $0x0,%al
   2:	85 ed                	test   %ebp,%ebp
   4:	74 4d                	je     0x53
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df
  10:	4d 89 f4             	mov    %r14,%r12
  13:	4c 89 f5             	mov    %r14,%rbp
  16:	49 c1 ec 03          	shr    $0x3,%r12
  1a:	83 e5 07             	and    $0x7,%ebp
  1d:	49 01 c4             	add    %rax,%r12
  20:	83 c5 03             	add    $0x3,%ebp
  23:	e8 2a 0e 0c 00       	call   0xc0e52
  28:	f3 90                	pause
* 2a:	41 0f b6 04 24       	movzbl (%r12),%eax <-- trapping instruction
  2f:	40 38 c5             	cmp    %al,%bpl
  32:	7c 08                	jl     0x3c
  34:	84 c0                	test   %al,%al
  36:	0f 85 a7 0c 00 00    	jne    0xce3
  3c:	8b 43 08             	mov    0x8(%rbx),%eax
  3f:	31                   	.byte 0x31