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.
=======================================================
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
loop0: detected capacity change from 32768 to 32704
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:922!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5329 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+0x40c6/0x4850 fs/ocfs2/suballoc.c:922
Code: 00 00 e9 2b f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c cc da ff ff 48 89 df e8 e5 86 42 fe e9 bf da ff ff e8 0b d6 d0 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 62 dc ff ff 4c 89 f7
RSP: 0018:ffffc9000eb5d820 EFLAGS: 00010283
RAX: ffffffff83f74a55 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 0000000000028f6a RDI: 0000000000028f6b
RBP: ffffc9000eb5dcf0 R08: ffffffff907a877f R09: 1ffffffff20f50ef
R10: dffffc0000000000 R11: fffffbfff20f50f0 R12: ffff888044365c60
R13: ffff888043c94e00 R14: dffffc0000000000 R15: fffff52001d6bb30
FS:  00007f1e68a506c0(0000) GS:ffff88808c2bb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e68a0cfe8 CR3: 0000000011f22000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_reserve_cluster_bitmap_bits+0xc4/0x1d0 fs/ocfs2/suballoc.c:1250
 ocfs2_local_alloc_reserve_for_window fs/ocfs2/localalloc.c:1106 [inline]
 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1242 [inline]
 ocfs2_reserve_local_alloc_bits+0x8d0/0x2680 fs/ocfs2/localalloc.c:669
 ocfs2_reserve_clusters_with_limit+0x1b9/0xc20 fs/ocfs2/suballoc.c:1284
 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1345 [inline]
 ocfs2_lock_allocators+0x2d1/0x5f0 fs/ocfs2/suballoc.c:3120
 ocfs2_write_begin_nolock+0x1b7b/0x41f0 fs/ocfs2/aops.c:1720
 __ocfs2_page_mkwrite fs/ocfs2/mmap.c:92 [inline]
 ocfs2_page_mkwrite+0x640/0xb60 fs/ocfs2/mmap.c:143
 do_page_mkwrite+0x147/0x310 mm/memory.c:3816
 wp_page_shared mm/memory.c:4217 [inline]
 do_wp_page+0x1a9c/0x4b80 mm/memory.c:4440
 handle_pte_fault mm/memory.c:6582 [inline]
 __handle_mm_fault mm/memory.c:6707 [inline]
 handle_mm_fault+0x15d7/0x3750 mm/memory.c:6876
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1675/0x2750 mm/gup.c:1428
 __get_user_pages_locked mm/gup.c:1692 [inline]
 __gup_longterm_locked+0x115b/0x15c0 mm/gup.c:2471
 gup_fast_fallback+0x1d92/0x20e0 mm/gup.c:3209
 iov_iter_extract_user_pages lib/iov_iter.c:1776 [inline]
 iov_iter_extract_pages+0x3a1/0x690 lib/iov_iter.c:1845
 iov_iter_extract_bvecs+0x272/0xb40 lib/iov_iter.c:1957
 bio_iov_iter_get_pages+0x5ae/0xee0 block/bio.c:1309
 blkdev_iov_iter_get_pages block/fops.c:49 [inline]
 __blkdev_direct_IO+0x661/0xf60 block/fops.c:219
 blkdev_direct_IO+0x121e/0x17c0 block/fops.c:440
 blkdev_read_iter+0x223/0x420 block/fops.c:821
 aio_read+0x33a/0x4d0 fs/aio.c:1656
 __io_submit_one fs/aio.c:-1 [inline]
 io_submit_one+0x774/0x13d0 fs/aio.c:2106
 __do_sys_io_submit fs/aio.c:2165 [inline]
 __se_sys_io_submit+0x195/0x340 fs/aio.c:2135
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e67b9e159
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:00007f1e68a4ffe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 00007f1e67e26090 RCX: 00007f1e67b9e159
RDX: 00002000000000c0 RSI: 00000000000000ca RDI: 00007f1e68a2f000
RBP: 00007f1e67c3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1e67e26128 R14: 00007f1e67e26090 R15: 00007fff6fd17148
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_reserve_suballoc_bits+0x40c6/0x4850 fs/ocfs2/suballoc.c:922
Code: 00 00 e9 2b f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c cc da ff ff 48 89 df e8 e5 86 42 fe e9 bf da ff ff e8 0b d6 d0 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 62 dc ff ff 4c 89 f7
RSP: 0018:ffffc9000eb5d820 EFLAGS: 00010283
RAX: ffffffff83f74a55 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 0000000000028f6a RDI: 0000000000028f6b
RBP: ffffc9000eb5dcf0 R08: ffffffff907a877f R09: 1ffffffff20f50ef
R10: dffffc0000000000 R11: fffffbfff20f50f0 R12: ffff888044365c60
R13: ffff888043c94e00 R14: dffffc0000000000 R15: fffff52001d6bb30
FS:  00007f1e68a506c0(0000) GS:ffff88808c2bb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b75d0ed00 CR3: 0000000011f22000 CR4: 0000000000352ef0