------------[ cut here ]------------
WARNING: CPU: 1 PID: 30669 at fs/mbcache.c:419 mb_cache_destroy+0x295/0x360 fs/mbcache.c:419
Modules linked in:
CPU: 1 PID: 30669 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-07726-g3c999d1ae3c7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:mb_cache_destroy+0x295/0x360 fs/mbcache.c:419
Code: 0f 85 c6 00 00 00 49 8b 3f e8 67 bc c5 ff 4c 89 ff 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f e9 51 bc c5 ff e8 4c 7a 74 ff 90 <0f> 0b 90 e9 5c ff ff ff 48 89 df e8 3b 2c d0 ff e9 d8 fe ff ff 4c
RSP: 0000:ffffc90003ac7bc8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88803497f268 RCX: ffffffff82196190
RDX: ffff888058102440 RSI: ffffffff82196234 RDI: 0000000000000005
RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000001 R12: ffff88803497f288
R13: dffffc0000000000 R14: ffff888047fd1258 R15: ffff888047fd1200
FS:  0000000000000000(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c38000 CR3: 000000002b61a000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_xattr_destroy_cache+0x1f/0x30 fs/ext4/xattr.c:3222
 ext4_put_super+0x627/0xdd0 fs/ext4/super.c:1375
 generic_shutdown_super+0x159/0x3d0 fs/super.c:641
 kill_block_super+0x3b/0x90 fs/super.c:1675
 ext4_kill_sb+0x6a/0xb0 fs/ext4/super.c:7323
 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
 deactivate_super+0xde/0x100 fs/super.c:505
 cleanup_mnt+0x222/0x450 fs/namespace.c:1267
 task_work_run+0x14e/0x250 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa7d/0x2c10 kernel/exit.c:878
 do_group_exit+0xd3/0x2a0 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+0x3e/0x50 kernel/exit.c:1036
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f75b307cee9
Code: Unable to access opcode bytes at 0x7f75b307cebf.
RSP: 002b:00007ffe35f9fb78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f75b30c83ba RCX: 00007f75b307cee9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000027 R08: 00007ffe35f9d916 R09: 00007ffe35fa0e30
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe35fa0e30
R13: 00007f75b30c8336 R14: 0000555568721430 R15: 0000000000000006
 </TASK>