loop0: detected capacity change from 0 to 2048
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/09/12 12:00 (1000)
------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 3603 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline]
WARNING: CPU: 1 PID: 3603 at fs/buffer.c:1145 __brelse+0x67/0xa0 fs/buffer.c:1139
Modules linked in:
CPU: 1 PID: 3603 Comm: syz-executor368 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__brelse fs/buffer.c:1145 [inline]
RIP: 0010:__brelse+0x67/0xa0 fs/buffer.c:1139
Code: 7c 04 84 d2 75 4e 44 8b 63 60 31 ff 44 89 e6 e8 1f a3 94 ff 45 85 e4 75 1c e8 55 a6 94 ff 48 c7 c7 80 9d fc 89 e8 65 5d 57 07 <0f> 0b 5b 5d 41 5c e9 3e a6 94 ff e8 39 a6 94 ff be 04 00 00 00 48
RSP: 0018:ffffc90003fcfad8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff888070848cb0 RCX: 0000000000000000
RDX: ffff8880249d0000 RSI: ffffffff8160f738 RDI: fffff520007f9f4d
RBP: ffff888070848d10 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000002 R11: 000000003a534656 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880b9b35f80 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87e3024290 CR3: 000000000bc8e000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 brelse include/linux/buffer_head.h:327 [inline]
 __invalidate_bh_lrus fs/buffer.c:1391 [inline]
 invalidate_bh_lru+0x99/0x150 fs/buffer.c:1404
 smp_call_function_many_cond+0x100e/0x1420 kernel/smp.c:978
 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1153
 kill_bdev block/bdev.c:75 [inline]
 blkdev_flush_mapping+0x136/0x2f0 block/bdev.c:662
 blkdev_put_whole+0xd1/0xf0 block/bdev.c:693
 blkdev_put+0x226/0x770 block/bdev.c:953
 deactivate_locked_super+0x94/0x160 fs/super.c:331
 deactivate_super+0xad/0xd0 fs/super.c:362
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1186
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xad5/0x29b0 kernel/exit.c:795
 do_group_exit+0xd2/0x2f0 kernel/exit.c:925
 __do_sys_exit_group kernel/exit.c:936 [inline]
 __se_sys_exit_group kernel/exit.c:934 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f87e2facd39
Code: Unable to access opcode bytes at 0x7f87e2facd0f.
RSP: 002b:00007ffdf1f6e508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f87e30233f0 RCX: 00007f87e2facd39
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f87e30233f0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>