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.
Oops: divide error: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted 6.16.0-rc2-syzkaller-00045-g4663747812d1 #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_bg_discontig_add_extent fs/ocfs2/suballoc.c:335 [inline]
RIP: 0010:ocfs2_block_group_fill+0x5bd/0xa70 fs/ocfs2/suballoc.c:386
Code: 34 1a 49 81 c6 50 01 00 00 45 0f b7 3f 49 83 c5 02 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 eb 03 00 00 44 89 f8 31 d2 <66> 41 f7 75 00 0f b7 d8 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0
RSP: 0018:ffffc9000d296940 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000
RDX: 0000000000000000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc9000d296a48 R08: 00313050554f5247 R09: 00313050554f5247
R10: dffffc0000000000 R11: ffffed100a989801 R12: dffffc0000000000
R13: ffff8880427fd2c2 R14: ffff888054c4c150 R15: 0000000000000000
FS: 00007f3342a506c0(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000033c000 CR3: 000000004262c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ocfs2_block_group_alloc_discontig fs/ocfs2/suballoc.c:634 [inline]
ocfs2_block_group_alloc fs/ocfs2/suballoc.c:703 [inline]
ocfs2_reserve_suballoc_bits+0x20a6/0x4640 fs/ocfs2/suballoc.c:834
ocfs2_reserve_new_metadata_blocks+0x403/0x940 fs/ocfs2/suballoc.c:984
ocfs2_reserve_new_metadata fs/ocfs2/suballoc.c:1027 [inline]
ocfs2_lock_allocators+0x29e/0x5c0 fs/ocfs2/suballoc.c:2761
ocfs2_write_begin_nolock+0x2279/0x4340 fs/ocfs2/aops.c:1718
ocfs2_write_begin+0x1bb/0x310 fs/ocfs2/aops.c:1882
generic_perform_write+0x2c4/0x910 mm/filemap.c:4112
ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x548/0xa90 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
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: 0033:0x7f3341b8e929
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:00007f3342a50038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3341db5fa0 RCX: 00007f3341b8e929
RDX: 000000000208e24b RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f3341c10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3341db5fa0 R15: 00007ffd49600af8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_bg_discontig_add_extent fs/ocfs2/suballoc.c:335 [inline]
RIP: 0010:ocfs2_block_group_fill+0x5bd/0xa70 fs/ocfs2/suballoc.c:386
Code: 34 1a 49 81 c6 50 01 00 00 45 0f b7 3f 49 83 c5 02 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 eb 03 00 00 44 89 f8 31 d2 <66> 41 f7 75 00 0f b7 d8 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0
RSP: 0018:ffffc9000d296940 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000
RDX: 0000000000000000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc9000d296a48 R08: 00313050554f5247 R09: 00313050554f5247
R10: dffffc0000000000 R11: ffffed100a989801 R12: dffffc0000000000
R13: ffff8880427fd2c2 R14: ffff888054c4c150 R15: 0000000000000000
FS: 00007f3342a506c0(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000033c000 CR3: 000000004262c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 34 1a xor $0x1a,%al
2: 49 81 c6 50 01 00 00 add $0x150,%r14
9: 45 0f b7 3f movzwl (%r15),%r15d
d: 49 83 c5 02 add $0x2,%r13
11: 4c 89 e8 mov %r13,%rax
14: 48 c1 e8 03 shr $0x3,%rax
18: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax
1d: 84 c0 test %al,%al
1f: 0f 85 eb 03 00 00 jne 0x410
25: 44 89 f8 mov %r15d,%eax
28: 31 d2 xor %edx,%edx
* 2a: 66 41 f7 75 00 divw 0x0(%r13) <-- trapping instruction
2f: 0f b7 d8 movzwl %ax,%ebx
32: 4c 89 f0 mov %r14,%rax
35: 48 c1 e8 03 shr $0x3,%rax
39: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax
3e: 84 c0 test %al,%al