loop0: detected capacity change from 0 to 256
loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
MTD: Attempt to mount non-MTD device "/dev/loop0"
------------[ cut here ]------------
kernel BUG at fs/buffer.c:1582!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5354 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:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1582
Code: 4c 89 e2 e8 56 7c b9 02 e9 42 ff ff ff e8 9c 4c 78 ff 48 89 df 48 c7 c6 e0 00 9a 8b e8 cd 8d e0 fe 90 0f 0b e8 85 4c 78 ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc9000d2d7980 EFLAGS: 00010293
RAX: ffffffff82476ebb RBX: ffffea0001534600 RCX: ffff888034a80000
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000001000
RBP: dffffc0000000000 R08: ffffea0001534607 R09: 1ffffd40002a68c0
R10: dffffc0000000000 R11: fffff940002a68c1 R12: 0000000000000000
R13: 0000000000001000 R14: ffff88804338a9f8 R15: 0000000000001000
FS:  00007f98083f56c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001f00 CR3: 0000000042c4a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 folio_alloc_buffers+0x3a0/0x640 fs/buffer.c:946
 grow_dev_folio fs/buffer.c:1075 [inline]
 grow_buffers fs/buffer.c:1116 [inline]
 __getblk_slow fs/buffer.c:1134 [inline]
 bdev_getblk+0x286/0x660 fs/buffer.c:1461
 __bread_gfp+0x89/0x3c0 fs/buffer.c:1515
 sb_bread include/linux/buffer_head.h:346 [inline]
 romfs_blk_read fs/romfs/storage.c:114 [inline]
 romfs_dev_read+0x22b/0x350 fs/romfs/storage.c:229
 romfs_fill_super+0x20e/0x720 fs/romfs/super.c:486
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692
 vfs_get_tree+0x92/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f980bf8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f98083f5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f980c1b5fa0 RCX: 00007f980bf8ebe9
RDX: 0000200000000580 RSI: 0000200000000540 RDI: 0000200000000500
RBP: 00007f980c011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000a00010 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f980c1b6038 R14: 00007f980c1b5fa0 R15: 00007ffe95c7ec28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1582
Code: 4c 89 e2 e8 56 7c b9 02 e9 42 ff ff ff e8 9c 4c 78 ff 48 89 df 48 c7 c6 e0 00 9a 8b e8 cd 8d e0 fe 90 0f 0b e8 85 4c 78 ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc9000d2d7980 EFLAGS: 00010293
RAX: ffffffff82476ebb RBX: ffffea0001534600 RCX: ffff888034a80000
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000000001000
RBP: dffffc0000000000 R08: ffffea0001534607 R09: 1ffffd40002a68c0
R10: dffffc0000000000 R11: fffff940002a68c1 R12: 0000000000000000
R13: 0000000000001000 R14: ffff88804338a9f8 R15: 0000000000001000
FS:  00007f98083f56c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe95c7df98 CR3: 0000000042c4a000 CR4: 0000000000352ef0