------------[ cut here ]------------
kernel BUG at fs/ocfs2/aops.c:1159!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5320 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~bpo12+1 04/01/2014
RIP: 0010:ocfs2_write_cluster fs/ocfs2/aops.c:1159 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1cc1/0x1cf0 fs/ocfs2/aops.c:1219
Code: 03 48 8d bc 24 10 02 00 00 48 c7 c6 97 ad 82 8d ba 6a 04 00 00 48 c7 c1 c0 f4 aa 8b e8 18 51 1b 00 90 0f 0b e8 b0 34 20 fe 90 <0f> 0b e8 a8 34 20 fe 90 0f 0b e8 a0 34 20 fe 90 0f 0b e8 98 34 20
RSP: 0000:ffffc9000d3aef00 EFLAGS: 00010293
RAX: ffffffff839f6ef0 RBX: ffff8880367a4014 RCX: ffff888000f64900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d3af230 R08: ffff888011061563 R09: 1ffff1100220c2ac
R10: dffffc0000000000 R11: ffffed100220c2ad R12: ffff888033804000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880367a4014
FS:  000055555d653500(0000) GS:ffff88808d306000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f0dbb8558 CR3: 000000004324c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_write_begin_nolock+0x31a3/0x4340 fs/ocfs2/aops.c:1796
 __ocfs2_page_mkwrite fs/ocfs2/mmap.c:93 [inline]
 ocfs2_page_mkwrite+0x600/0xc40 fs/ocfs2/mmap.c:144
 do_page_mkwrite+0x14d/0x310 mm/memory.c:3488
 wp_page_shared mm/memory.c:3889 [inline]
 do_wp_page+0x268d/0x5800 mm/memory.c:4108
 handle_pte_fault mm/memory.c:6193 [inline]
 __handle_mm_fault+0x1033/0x5400 mm/memory.c:6318
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487
 do_user_addr_fault+0x764/0x1380 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f6f0d958270
Code: fa 08 73 36 48 83 ea 04 73 e0 83 fa fd 7c 10 8a 0e 74 0a 0f b7 74 16 02 66 89 74 17 02 88 0f c3 c5 fa 6f 06 c5 fa 6f 4c 16 f0 <c5> fa 7f 07 c5 fa 7f 4c 17 f0 c3 0f 1f 44 00 00 48 8b 4c 16 f8 48
RSP: 002b:00007ffc13a0df68 EFLAGS: 00010246
RAX: 0000200000000000 RBX: 0000000000000004 RCX: 8000000000000010
RDX: 0000000000000010 RSI: 00007f6f0d428988 RDI: 0000200000000000
RBP: 00007f6f0dbe7da0 R08: 00007f6f0d7ff02c R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f6f0dbe5fac
R13: 00007f6f0dbe5fa0 R14: fffffffffffffffe R15: 00007ffc13a0e080
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_write_cluster fs/ocfs2/aops.c:1159 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1cc1/0x1cf0 fs/ocfs2/aops.c:1219
Code: 03 48 8d bc 24 10 02 00 00 48 c7 c6 97 ad 82 8d ba 6a 04 00 00 48 c7 c1 c0 f4 aa 8b e8 18 51 1b 00 90 0f 0b e8 b0 34 20 fe 90 <0f> 0b e8 a8 34 20 fe 90 0f 0b e8 a0 34 20 fe 90 0f 0b e8 98 34 20
RSP: 0000:ffffc9000d3aef00 EFLAGS: 00010293
RAX: ffffffff839f6ef0 RBX: ffff8880367a4014 RCX: ffff888000f64900
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d3af230 R08: ffff888011061563 R09: 1ffff1100220c2ac
R10: dffffc0000000000 R11: ffffed100220c2ad R12: ffff888033804000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880367a4014
FS:  000055555d653500(0000) GS:ffff88808d306000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f18ed4d95a1 CR3: 000000004324c000 CR4: 0000000000352ef0