loop0: detected capacity change from 32768 to 32255
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:900!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5342 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 04/01/2014
RIP: 0010:ocfs2_reserve_suballoc_bits+0x40b5/0x4840 fs/ocfs2/suballoc.c:900
Code: 24 78 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 9d da ff ff 48 89 df e8 f6 94 64 fe e9 90 da ff ff e8 2c b0 f7 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 3a dc ff ff 4c 89 f7
RSP: 0018:ffffc9000f8c5f00 EFLAGS: 00010287
RAX: ffffffff83ce15e4 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc90020802000 RSI: 000000000001568c RDI: 000000000001568d
RBP: ffffc9000f8c63d0 R08: ffffffff90304df7 R09: 1ffffffff20609be
R10: dffffc0000000000 R11: fffffbfff20609bf R12: ffff888013235c60
R13: ffff888056de1e00 R14: dffffc0000000000 R15: fffff52001f18c0c
FS:  00007fb26f1f76c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000038000 CR3: 0000000012a25000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1228 [inline]
 ocfs2_reserve_clusters_with_limit+0x3bc/0xc20 fs/ocfs2/suballoc.c:1273
 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:768 [inline]
 ocfs2_reserve_suballoc_bits+0x794/0x4840 fs/ocfs2/suballoc.c:928
 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1078
 ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1121 [inline]
 ocfs2_lock_allocators+0x299/0x600 fs/ocfs2/suballoc.c:3087
 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2310 [inline]
 ocfs2_dio_end_io+0x494/0x1370 fs/ocfs2/aops.c:2418
 dio_complete+0x25b/0x790 fs/direct-io.c:281
 __blockdev_direct_IO+0x2e5d/0x34e0 fs/direct-io.c:1303
 ocfs2_direct_IO+0x251/0x2c0 fs/ocfs2/aops.c:2455
 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4259
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4428
 ocfs2_file_write_iter+0x1663/0x1e70 fs/ocfs2/file.c:2476
 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1228
 do_sendfile+0x535/0x7d0 fs/read_write.c:1372
 __do_sys_sendfile64 fs/read_write.c:1433 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb26e39ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb26f1f6fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fb26e616180 RCX: 00007fb26e39ce59
RDX: 0000000000000000 RSI: 000000000000000b RDI: 000000000000000c
RBP: 00007fb26e432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000080000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb26e616218 R14: 00007fb26e616180 R15: 00007fff9ad349d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_reserve_suballoc_bits+0x40b5/0x4840 fs/ocfs2/suballoc.c:900
Code: 24 78 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 9d da ff ff 48 89 df e8 f6 94 64 fe e9 90 da ff ff e8 2c b0 f7 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 3a dc ff ff 4c 89 f7
RSP: 0018:ffffc9000f8c5f00 EFLAGS: 00010287
RAX: ffffffff83ce15e4 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc90020802000 RSI: 000000000001568c RDI: 000000000001568d
RBP: ffffc9000f8c63d0 R08: ffffffff90304df7 R09: 1ffffffff20609be
R10: dffffc0000000000 R11: fffffbfff20609bf R12: ffff888013235c60
R13: ffff888056de1e00 R14: dffffc0000000000 R15: fffff52001f18c0c
FS:  00007fb26f1f76c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000033c000 CR3: 0000000012a25000 CR4: 0000000000352ef0