------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 6461 at fs/buffer.c:1235 __brelse fs/buffer.c:1235 [inline]
WARNING: CPU: 1 PID: 6461 at fs/buffer.c:1235 brelse include/linux/buffer_head.h:309 [inline]
WARNING: CPU: 1 PID: 6461 at fs/buffer.c:1235 __invalidate_bh_lrus fs/buffer.c:1487 [inline]
WARNING: CPU: 1 PID: 6461 at fs/buffer.c:1235 invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1500
Modules linked in:
CPU: 1 PID: 6461 Comm: syz-executor.5 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__brelse fs/buffer.c:1235 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:309 [inline]
RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1487 [inline]
RIP: 0010:invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1500
Code: 14 3f dd ff f0 ff 0b eb 25 e8 4a ed 79 ff 41 80 3c 2e 00 75 2a eb 30 e8 3c ed 79 ff 90 48 c7 c7 20 e3 b8 8b e8 5f c1 3c ff 90 <0f> 0b 90 90 48 bd 00 00 00 00 00 fc ff df 41 80 3c 2e 00 74 08 4c
RSP: 0018:ffffc90000a08f30 EFLAGS: 00010046
RAX: 1a443d742fae7d00 RBX: ffff88805b4ce7a0 RCX: ffff888027cf5a00
RDX: 0000000080010002 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8157cc12 R09: 1ffff110172a51a2
R10: dffffc0000000000 R11: ffffed10172a51a3 R12: ffff8880b9539030
R13: 0000000000000000 R14: 1ffff110172a7206 R15: ffff8880b9539030
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d15aca000 CR3: 000000005e152000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 csd_do_func kernel/smp.c:133 [inline]
 __flush_smp_call_function_queue+0x3ee/0x15b0 kernel/smp.c:511
 __sysvec_call_function_single+0xa8/0x3e0 arch/x86/kernel/smp.c:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 4e 39 79 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f3 e0 e5 f5 65 8b 05 44 c5 84 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900035dfa80 EFLAGS: 00000206
RAX: 1a443d742fae7d00 RBX: 1ffff920006bbf54 RCX: ffffffff944dd603
RDX: dffffc0000000000 RSI: ffffffff8baac1e0 RDI: 0000000000000001
RBP: ffffc900035dfb10 R08: ffffffff8f873a6f R09: 1ffffffff1f0e74d
R10: dffffc0000000000 R11: fffffbfff1f0e74e R12: dffffc0000000000
R13: 1ffff920006bbf50 R14: ffffc900035dfaa0 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 free_percpu+0xafd/0x1120 mm/percpu.c:2327
 mm_destroy_cid include/linux/mm_types.h:1156 [inline]
 __mmdrop+0x28e/0x3d0 kernel/fork.c:925
 exit_mm+0x220/0x310 kernel/exit.c:569
 do_exit+0x99e/0x27e0 kernel/exit.c:865
 do_group_exit+0x207/0x2c0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 do_syscall_64+0xfd/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fe42827de69
Code: Unable to access opcode bytes at 0x7fe42827de3f.
RSP: 002b:00007ffd4e385468 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007fe42827de69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00000000000008e1 R09: 0000000000000000
R10: 0000001b2dd20000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
----------------
Code disassembly (best guess):
   0:	9c                   	pushf
   1:	8f 44 24 20          	pop    0x20(%rsp)
   5:	42 80 3c 23 00       	cmpb   $0x0,(%rbx,%r12,1)
   a:	74 08                	je     0x14
   c:	4c 89 f7             	mov    %r14,%rdi
   f:	e8 4e 39 79 f6       	call   0xf6793962
  14:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  19:	75 52                	jne    0x6d
  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 f3 e0 e5 f5       	call   0xf5e5e122 <-- trapping instruction
  2f:	65 8b 05 44 c5 84 74 	mov    %gs:0x7484c544(%rip),%eax        # 0x7484c57a
  36:	85 c0                	test   %eax,%eax
  38:	74 43                	je     0x7d
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss