------------[ cut here ]------------
kernel BUG at fs/ocfs2/aops.c:1161!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5324 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_write_cluster fs/ocfs2/aops.c:1161 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1da7/0x1dd0 fs/ocfs2/aops.c:1221
Code: 48 c7 c6 ad 2a 47 8e ba 6c 04 00 00 48 c7 c1 80 bf 55 8c e8 4b 14 1d 00 48 8b 44 24 10 c6 40 1e f8 90 0f 0b e8 da e9 df fd 90 <0f> 0b e8 d2 e9 df fd 90 0f 0b e8 ca e9 df fd 90 0f 0b e8 c2 e9 df
RSP: 0018:ffffc9000d9aea00 EFLAGS: 00010246
RAX: ffffffff83e7f996 RBX: ffff8880441da488 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc9000d9aed50 R08: ffff8880441da313 R09: 1ffff1100883b462
R10: dffffc0000000000 R11: ffffed100883b463 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888033770014 R15: 0000000000000000
FS:  00007ff4ec1d46c0(0000) GS:ffff88808c2c6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001200a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_write_begin_nolock+0x3346/0x41f0 fs/ocfs2/aops.c:1797
 ocfs2_write_begin+0x1ba/0x310 fs/ocfs2/aops.c:1885
 generic_perform_write+0x2d5/0x8f0 mm/filemap.c:4374
 ocfs2_file_write_iter+0x1706/0x1f10 fs/ocfs2/file.c:2481
 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:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff4efd9e159
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:00007ff4ec1d3fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff4f0026090 RCX: 00007ff4efd9e159
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000004
RBP: 00007ff4efe3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff4f0026128 R14: 00007ff4f0026090 R15: 00007ffcdc737a48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_write_cluster fs/ocfs2/aops.c:1161 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1da7/0x1dd0 fs/ocfs2/aops.c:1221
Code: 48 c7 c6 ad 2a 47 8e ba 6c 04 00 00 48 c7 c1 80 bf 55 8c e8 4b 14 1d 00 48 8b 44 24 10 c6 40 1e f8 90 0f 0b e8 da e9 df fd 90 <0f> 0b e8 d2 e9 df fd 90 0f 0b e8 ca e9 df fd 90 0f 0b e8 c2 e9 df
RSP: 0018:ffffc9000d9aea00 EFLAGS: 00010246
RAX: ffffffff83e7f996 RBX: ffff8880441da488 RCX: 0000000000100000
RDX: ffffc90020001000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc9000d9aed50 R08: ffff8880441da313 R09: 1ffff1100883b462
R10: dffffc0000000000 R11: ffffed100883b463 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888033770014 R15: 0000000000000000
FS:  00007ff4ec1d46c0(0000) GS:ffff88808c2c6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001200a000 CR4: 0000000000352ef0