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.
=======================================================
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
loop0: detected capacity change from 32768 to 0
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:804!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #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:ocfs2_reserve_suballoc_bits+0x485d/0x4f30 fs/ocfs2/suballoc.c:804
Code: e1 07 80 c1 03 38 c1 0f 8c 75 dd ff ff 48 8d bc 24 b0 01 00 00 e8 43 68 60 fe e9 63 dd ff ff e8 09 85 4f 08 e8 74 48 f8 fd 90 <0f> 0b e8 6c 48 f8 fd 48 c7 c7 40 11 04 8f 48 8b 74 24 10 48 89 da
RSP: 0018:ffffc9000d47e2a0 EFLAGS: 00010287
RAX: ffffffff83cb1a5c RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc9000eb32000 RSI: 000000000000034c RDI: 000000000000034d
RBP: ffffc9000d47e790 R08: ffffffff83cad468 R09: 1ffffffff2079fae
R10: dffffc0000000000 R11: fffffbfff2079faf R12: ffff888044334fb8
R13: 000000000000ffff R14: dffffc0000000000 R15: ffff8880543d8e00
FS:  00007fa32f1f76c0(0000) GS:ffff88808c824000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dc28e42c38 CR3: 0000000040fb8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1132 [inline]
 ocfs2_reserve_clusters_with_limit+0x3df/0xb60 fs/ocfs2/suballoc.c:1177
 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1227 [inline]
 ocfs2_lock_allocators+0x32f/0x680 fs/ocfs2/suballoc.c:2746
 ocfs2_extend_allocation+0x4ef/0x1bf0 fs/ocfs2/file.c:589
 ocfs2_extend_no_holes+0x1f8/0x4d0 fs/ocfs2/file.c:1027
 ocfs2_expand_nonsparse_inode+0x157/0x470 fs/ocfs2/aops.c:1606
 ocfs2_write_begin_nolock+0x2019/0x4e80 fs/ocfs2/aops.c:1672
 ocfs2_write_begin+0x207/0x3a0 fs/ocfs2/aops.c:1889
 generic_perform_write+0x329/0xa10 mm/filemap.c:4102
 ocfs2_file_write_iter+0x190f/0x20d0 fs/ocfs2/file.c:2469
 do_iter_readv_writev+0x71f/0x9d0
 vfs_writev+0x38d/0xbc0 fs/read_write.c:1055
 do_pwritev fs/read_write.c:1151 [inline]
 __do_sys_pwritev2 fs/read_write.c:1209 [inline]
 __se_sys_pwritev2+0x1b8/0x2d0 fs/read_write.c:1200
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa32e38d169
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:00007fa32f1f7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fa32e5a5fa0 RCX: 00007fa32e38d169
RDX: 0000000000000001 RSI: 00002000000000c0 RDI: 000000000000000d
RBP: 00007fa32e40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000800001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa32e5a5fa0 R15: 00007ffc303d3e58
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_reserve_suballoc_bits+0x485d/0x4f30 fs/ocfs2/suballoc.c:804
Code: e1 07 80 c1 03 38 c1 0f 8c 75 dd ff ff 48 8d bc 24 b0 01 00 00 e8 43 68 60 fe e9 63 dd ff ff e8 09 85 4f 08 e8 74 48 f8 fd 90 <0f> 0b e8 6c 48 f8 fd 48 c7 c7 40 11 04 8f 48 8b 74 24 10 48 89 da
RSP: 0018:ffffc9000d47e2a0 EFLAGS: 00010287
RAX: ffffffff83cb1a5c RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc9000eb32000 RSI: 000000000000034c RDI: 000000000000034d
RBP: ffffc9000d47e790 R08: ffffffff83cad468 R09: 1ffffffff2079fae
R10: dffffc0000000000 R11: fffffbfff2079faf R12: ffff888044334fb8
R13: 000000000000ffff R14: dffffc0000000000 R15: ffff8880543d8e00
FS:  00007fa32f1f76c0(0000) GS:ffff88808c824000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005f18 CR3: 0000000040fb8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400