loop0: detected capacity change from 0 to 64
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5353 at fs/buffer.c:1183 mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1183
Modules linked in:
CPU: 0 UID: 0 PID: 5353 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1183
Code: 4c 89 f7 e8 d9 4b dd ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 d4 02 fc ff e8 0f 5f 78 ff eb 8c e8 08 5f 78 ff 90 <0f> 0b 90 e9 95 fd ff ff e8 fa 5e 78 ff 90 0f 0b 90 e9 bf fd ff ff
RSP: 0018:ffffc9000d4d7ca0 EFLAGS: 00010293
RAX: ffffffff82475c38 RBX: ffff88804488d2b8 RCX: ffff88803355a440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000001 R08: ffff88804488d2bf R09: 1ffff11008911a57
R10: dffffc0000000000 R11: ffffed1008911a58 R12: 1ffff110066b94c8
R13: ffff888011a8a780 R14: ffff8880335ca640 R15: ffff888011a8a7c8
FS:  00007fb7e474d6c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001580 CR3: 0000000044434000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 minix_put_super+0x16d/0x460 fs/minix/inode.c:50
 generic_shutdown_super+0x132/0x2c0 fs/super.c:643
 kill_block_super+0x44/0x90 fs/super.c:1766
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb7e399038a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb7e474ce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007fb7e474cef0 RCX: 00007fb7e399038a
RDX: 0000200000000140 RSI: 00002000000001c0 RDI: 00007fb7e474ceb0
RBP: 0000200000000140 R08: 00007fb7e474cef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007fb7e474ceb0 R14: 0000000000000190 R15: 0000200000000200
 </TASK>