------------[ cut here ]------------
kernel BUG at fs/ocfs2/aops.c:1159!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5342 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:1159 [inline]
RIP: 0010:ocfs2_write_cluster_by_desc+0x1db4/0x1de0 fs/ocfs2/aops.c:1219
Code: 00 48 c7 c6 71 d7 b2 8d ba 6a 04 00 00 48 c7 c1 40 61 d1 8b e8 dd 39 1c 00 48 8b 04 24 c6 40 1e f8 90 0f 0b e8 8d 7c 17 fe 90 <0f> 0b e8 85 7c 17 fe 90 0f 0b e8 7d 7c 17 fe 90 0f 0b e8 75 7c 17
RSP: 0018:ffffc9000e57dd20 EFLAGS: 00010293
RAX: ffffffff83ab2bd3 RBX: ffff888037de6014 RCX: ffff888035a824c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000e57e050 R08: ffff888012d04023 R09: 1ffff110025a0804
R10: dffffc0000000000 R11: ffffed10025a0805 R12: ffff888044e70000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888037de6014
FS:  00007ff62367e6c0(0000) GS:ffff88808cf1d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560cadbc3168 CR3: 0000000023003000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_write_begin_nolock+0x3305/0x4140 fs/ocfs2/aops.c:1796
 ocfs2_write_begin+0x1c5/0x320 fs/ocfs2/aops.c:1884
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4314
 ocfs2_file_write_iter+0x1663/0x1e20 fs/ocfs2/file.c:2475
 __kernel_write_iter+0x41e/0x880 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0x8ba/0xc70 fs/coredump.c:1372
 elf_core_dump+0x34c2/0x3ad0 fs/binfmt_elf.c:2111
 coredump_write+0x11de/0x1980 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x369e/0x4270 fs/coredump.c:1200
 get_signal+0x1107/0x1330 kernel/signal.c:3019
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0x176/0x620 kernel/entry/common.c:196
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x327366636f
Code: Unable to access opcode bytes at 0x3273666345.
RSP: 002b:0000200000000148 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007ff622a15fa0 RCX: 00007ff62279acb9
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000001020000
RBP: 00007ff622808bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007ff622a16038 R14: 00007ff622a15fa0 R15: 00007fffe8bb4638
 </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+0x1db4/0x1de0 fs/ocfs2/aops.c:1219
Code: 00 48 c7 c6 71 d7 b2 8d ba 6a 04 00 00 48 c7 c1 40 61 d1 8b e8 dd 39 1c 00 48 8b 04 24 c6 40 1e f8 90 0f 0b e8 8d 7c 17 fe 90 <0f> 0b e8 85 7c 17 fe 90 0f 0b e8 7d 7c 17 fe 90 0f 0b e8 75 7c 17
RSP: 0018:ffffc9000e57dd20 EFLAGS: 00010293
RAX: ffffffff83ab2bd3 RBX: ffff888037de6014 RCX: ffff888035a824c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000e57e050 R08: ffff888012d04023 R09: 1ffff110025a0804
R10: dffffc0000000000 R11: ffffed10025a0805 R12: ffff888044e70000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888037de6014
FS:  00007ff62367e6c0(0000) GS:ffff88808cf1d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560cadbc3168 CR3: 0000000023003000 CR4: 0000000000352ef0