------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 143 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline]
WARNING: CPU: 1 PID: 143 at fs/buffer.c:1145 brelse+0x78/0xa0 include/linux/buffer_head.h:327
Modules linked in:
CPU: 1 PID: 143 Comm: kworker/1:2 Not tainted 6.0.0-rc7-syzkaller-00081-gc3e0e1e23c70 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: rcu_gp wait_rcu_exp_gp
RIP: 0010:__brelse fs/buffer.c:1145 [inline]
RIP: 0010:brelse+0x78/0xa0 include/linux/buffer_head.h:327
Code: df be 04 00 00 00 e8 07 1b e1 ff f0 ff 0b eb 1c e8 0d 25 8e ff eb 15 e8 06 25 8e ff 48 c7 c7 a0 9a 9d 8a 31 c0 e8 d8 b1 56 ff <0f> 0b 5b 5d c3 89 d9 80 e1 07 80 c1 03 38 c1 7c af 48 89 df e8 0f
RSP: 0018:ffffc900001f0f18 EFLAGS: 00010046
RAX: 19966679b9000200 RBX: ffff888072065888 RCX: ffff88801c5c8000
RDX: 0000000080010002 RSI: 0000000080010002 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff816bd38d R09: ffffed1017364f14
R10: ffffed1017364f14 R11: 1ffff11017364f13 R12: 0000000000000000
R13: 1ffff11017367fe2 R14: ffff8880b9b35cf8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff9a39af2f0 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __invalidate_bh_lrus+0x37/0x3c0 fs/buffer.c:1391
 invalidate_bh_lru+0x66/0xb0 fs/buffer.c:1404
 __flush_smp_call_function_queue+0x2bc/0xcc0 kernel/smp.c:631
 __sysvec_call_function_single+0x62/0x70 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x8c/0xb0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:657
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 3a b4 ae f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 6f 1e 30 f7 65 8b 05 60 a5 d6 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000298f900 EFLAGS: 00000206
RAX: 1ffff92000531f24 RBX: ffffffff8cb28388 RCX: ffffffff8168150a
RDX: dffffc0000000000 RSI: ffffffff8a8d8fa0 RDI: 0000000000000001
RBP: ffffc9000298f990 R08: dffffc0000000000 R09: fffffbfff1fc100b
R10: fffffbfff1fc100b R11: 1ffffffff1fc100a R12: dffffc0000000000
R13: 1ffff92000531f20 R14: ffffc9000298f920 R15: 0000000000000a02
 spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
 __wake_up_common_lock kernel/sched/wait.c:139 [inline]
 __wake_up+0x153/0x210 kernel/sched/wait.c:156
 rcu_exp_wait_wake kernel/rcu/tree_exp.h:706 [inline]
 rcu_exp_sel_wait_wake+0x17c9/0x1cc0 kernel/rcu/tree_exp.h:722
 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
----------------
Code disassembly (best guess):
   0:	f0 48 c1 e8 03       	lock shr $0x3,%rax
   5:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   a:	74 08                	je     0x14
   c:	4c 89 f7             	mov    %r14,%rdi
   f:	e8 3a b4 ae f7       	callq  0xf7aeb44e
  14:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  19:	75 4e                	jne    0x69
  1b:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 6f 1e 30 f7       	callq  0xf7301e9e <-- trapping instruction
  2f:	65 8b 05 60 a5 d6 75 	mov    %gs:0x75d6a560(%rip),%eax        # 0x75d6a596
  36:	85 c0                	test   %eax,%eax
  38:	74 3f                	je     0x79
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss