netlink: 8 bytes leftover after parsing attributes in process `syz.0.0'.
openvswitch: netlink: Flow actions may not be safe on all matching packets.
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.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/refcounttree.c:2895!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5332 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_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2895
Code: 02 75 21 e8 89 e6 db fd 48 89 df be 08 00 00 00 e8 dc 0d 4b fe 3e 80 23 ef 31 c0 5b 41 5e e9 be da e9 07 cc e8 68 e6 db fd 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f6c6d58 EFLAGS: 00010283
RAX: ffffffff83ea9b68 RBX: ffff88805207c700 RCX: 0000000000100000
RDX: ffffc9000ed9a000 RSI: 00000000000269a6 RDI: 00000000000269a7
RBP: 0000000000000001 R08: ffff88805207c707 R09: 1ffff1100a40f8e0
R10: dffffc0000000000 R11: ffffed100a40f8e1 R12: ffff88805207c700
R13: ffff88805207c7e0 R14: 0000000000000002 R15: 0000000000001000
FS:  00007f3598c906c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f358cbff000 CR3: 0000000034332000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 walk_page_buffers+0x94/0x1e0 fs/ocfs2/aops.c:421
 ocfs2_duplicate_clusters_by_page+0x70b/0xcd0 fs/ocfs2/refcounttree.c:2974
 ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3125 [inline]
 ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3257 [inline]
 ocfs2_replace_cow+0xaf4/0x1c90 fs/ocfs2/refcounttree.c:3351
 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3429 [inline]
 ocfs2_refcount_cow+0x790/0xd40 fs/ocfs2/refcounttree.c:3472
 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2352 [inline]
 ocfs2_file_write_iter+0xf26/0x1f10 fs/ocfs2/file.c:2463
 iter_file_splice_write+0xa31/0x1240 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+0x57b/0xcb0 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1228
 do_sendfile+0x52e/0x7c0 fs/read_write.c:1371
 __do_sys_sendfile64 fs/read_write.c:1432 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418
 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: 0033:0x7f3597d9de99
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:00007f3598c8ffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f3598025fa0 RCX: 00007f3597d9de99
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000009
RBP: 00007f3597e33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0001000200201005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3598026038 R14: 00007f3598025fa0 R15: 00007ffd9ba9ec78
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2895
Code: 02 75 21 e8 89 e6 db fd 48 89 df be 08 00 00 00 e8 dc 0d 4b fe 3e 80 23 ef 31 c0 5b 41 5e e9 be da e9 07 cc e8 68 e6 db fd 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f6c6d58 EFLAGS: 00010283
RAX: ffffffff83ea9b68 RBX: ffff88805207c700 RCX: 0000000000100000
RDX: ffffc9000ed9a000 RSI: 00000000000269a6 RDI: 00000000000269a7
RBP: 0000000000000001 R08: ffff88805207c707 R09: 1ffff1100a40f8e0
R10: dffffc0000000000 R11: ffffed100a40f8e1 R12: ffff88805207c700
R13: ffff88805207c7e0 R14: 0000000000000002 R15: 0000000000001000
FS:  00007f3598c906c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3598c4dfe8 CR3: 0000000034332000 CR4: 0000000000352ef0