loop0: detected capacity change from 0 to 64
hfs: unable to locate alternate MDB
hfs: continuing without an alternate MDB
syz.0.0 (5324): drop_caches: 2
syz.0.0 (5324): drop_caches: 2
Buffer I/O error on dev loop0, logical block 2, lost async page write
Buffer I/O error on dev loop0, logical block 3, lost async page write
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5324 at fs/buffer.c:1186 mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1186
Modules linked in:
CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #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:1186
Code: 4c 89 f7 e8 79 0d de ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 c4 34 fc ff e8 5f 18 7c ff eb 8c e8 58 18 7c ff 90 <0f> 0b 90 e9 95 fd ff ff e8 4a 18 7c ff 90 0f 0b 90 e9 bf fd ff ff
RSP: 0018:ffffc9000d4ef920 EFLAGS: 00010293
RAX: ffffffff8243a678 RBX: ffff888044444d98 RCX: ffff88801f6da440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff11008293c01 R08: ffff888044444d9f R09: 1ffff110088889b3
R10: dffffc0000000000 R11: ffffed10088889b4 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff82984110 R15: ffff88804149e780
FS:  0000000000000000(0000) GS:ffff88808d6cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002080 CR3: 0000000050d11000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_put_super+0x49/0x60 fs/hfs/super.c:51
 generic_shutdown_super+0x132/0x2c0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1710
 deactivate_locked_super+0xb9/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1435
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efeb418e969
Code: Unable to access opcode bytes at 0x7efeb418e93f.
RSP: 002b:00007efeb503f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007efeb43b5fa8 RCX: 00007efeb418e969
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efeb43b5fa8
RBP: 00007efeb43b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efeb43b5fac
R13: 0000000000000000 R14: 00007fffd07361b0 R15: 00007fffd0736298
 </TASK>