------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 3872 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline]
WARNING: CPU: 0 PID: 3872 at fs/buffer.c:1145 brelse+0x78/0xa0 include/linux/buffer_head.h:326
Modules linked in:
CPU: 0 PID: 3872 Comm: udevd Not tainted 6.1.0-rc4-syzkaller-00159-g4bbf3422df78 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__brelse fs/buffer.c:1145 [inline]
RIP: 0010:brelse+0x78/0xa0 include/linux/buffer_head.h:326
Code: df be 04 00 00 00 e8 b7 89 e0 ff f0 ff 0b eb 1c e8 ed 89 8c ff eb 15 e8 e6 89 8c ff 48 c7 c7 80 cc 9d 8a 31 c0 e8 f8 27 54 ff <0f> 0b 5b 5d c3 89 d9 80 e1 07 80 c1 03 38 c1 7c af 48 89 df e8 bf
RSP: 0018:ffffc90000007f18 EFLAGS: 00010046
RAX: 166039d973685c00 RBX: ffff8880354ba400 RCX: ffff88807a7a3a80
RDX: 0000000080010001 RSI: 0000000080010001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff816b9e3d R09: ffffed1017344f13
R10: ffffed1017344f13 R11: 1ffff11017344f12 R12: 0000000000000000
R13: 1ffff1101734840e R14: ffff8880b9a35cf8 R15: dffffc0000000000
FS:  00007f172cf9b840(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0ce56d53be CR3: 000000002f28e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __invalidate_bh_lrus+0x37/0x3c0 fs/buffer.c:1380
 invalidate_bh_lru+0x66/0xb0 fs/buffer.c:1393
 __flush_smp_call_function_queue+0x2cc/0xcd0 kernel/smp.c:630
 __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:i_uid_into_mnt include/linux/fs.h:1629 [inline]
RIP: 0010:acl_permission_check fs/namei.c:342 [inline]
RIP: 0010:generic_permission+0x81/0x4e0 fs/namei.c:404
Code: 74 08 4c 89 f7 e8 ff 7d ee ff bb e8 07 00 00 49 03 1e 48 89 d8 48 c1 e8 03 80 3c 28 00 74 08 48 89 df e8 e2 7d ee ff 48 8b 2b <49> 8d 5c 24 04 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90005be7760 EFLAGS: 00000246
RAX: 1ffff110050d90fd RBX: ffff8880286c87e8 RCX: ffff88807a7a3a80
RDX: 0000000000000000 RSI: ffff888140d08cb8 RDI: ffffffff8c9cc600
RBP: ffffffff8c9cc600 R08: ffffffff81ed652c R09: ffffffff81eece33
R10: 0000000000000002 R11: ffff88807a7a3a80 R12: ffff888140d08cb8
R13: 1ffff110281a119c R14: ffff888140d08ce0 R15: 00000000000041ed
 do_inode_permission fs/namei.c:465 [inline]
 inode_permission+0xa1/0x450 fs/namei.c:525
 may_lookup fs/namei.c:1711 [inline]
 link_path_walk+0x29d/0xf00 fs/namei.c:2262
 path_lookupat+0xab/0x450 fs/namei.c:2473
 filename_lookup+0x274/0x650 fs/namei.c:2503
 vfs_statx+0x117/0x4a0 fs/stat.c:229
 vfs_fstatat fs/stat.c:267 [inline]
 __do_sys_newfstatat fs/stat.c:437 [inline]
 __se_sys_newfstatat+0xed/0x7d0 fs/stat.c:431
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f172cb251da
Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 0b 00 00 00 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 69 fc 0c 00 f7
RSP: 002b:00007ffea64861f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000563228b94cc0 RCX: 00007f172cb251da
RDX: 00007ffea6486208 RSI: 00007ffea6486298 RDI: 00000000ffffff9c
RBP: 0000563228b9c1bf R08: 0000563228b9c1bf R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 0000000000000000
R13: 0000563228b94db0 R14: 00007ffea6486298 R15: 0000563227335160
 </TASK>
----------------
Code disassembly (best guess):
   0:	74 08                	je     0xa
   2:	4c 89 f7             	mov    %r14,%rdi
   5:	e8 ff 7d ee ff       	callq  0xffee7e09
   a:	bb e8 07 00 00       	mov    $0x7e8,%ebx
   f:	49 03 1e             	add    (%r14),%rbx
  12:	48 89 d8             	mov    %rbx,%rax
  15:	48 c1 e8 03          	shr    $0x3,%rax
  19:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  1d:	74 08                	je     0x27
  1f:	48 89 df             	mov    %rbx,%rdi
  22:	e8 e2 7d ee ff       	callq  0xffee7e09
  27:	48 8b 2b             	mov    (%rbx),%rbp
* 2a:	49 8d 5c 24 04       	lea    0x4(%r12),%rbx <-- trapping instruction
  2f:	48 89 d8             	mov    %rbx,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  3d:	fc ff df