syz-executor312[8057]: segfault at 0 ip           (null) sp 00000000200000c8 error 14
syz-executor312[8064]: segfault at 0 ip           (null) sp 00000000200000c8 error 14
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8079 at fs/buffer.c:1149 mark_buffer_dirty+0x347/0x480 fs/buffer.c:1149
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8079 Comm: syz-executor312 Not tainted 4.14.296-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:mark_buffer_dirty+0x347/0x480 fs/buffer.c:1149
RSP: 0018:ffff88809c8f78e8 EFLAGS: 00010297
RAX: ffff888093e84140 RBX: ffff888089042000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888089ee5600 RDI: ffff888089042000
RBP: ffffed10156a858d R08: 0000000000000001 R09: ffffed10113dd37f
R10: ffff888089ee9bff R11: 0000000000000000 R12: 000000000000000a
R13: ffff8880ab542b40 R14: ffff888089042000 R15: ffff88808afa9f18
 bfs_move_block fs/bfs/file.c:43 [inline]
 bfs_move_blocks fs/bfs/file.c:56 [inline]
 bfs_get_block+0x35c/0xaf0 fs/bfs/file.c:125
 __block_write_begin_int+0x35c/0x11d0 fs/buffer.c:2038
 __block_write_begin fs/buffer.c:2088 [inline]
 block_write_begin+0x58/0x270 fs/buffer.c:2147
 bfs_write_begin+0x35/0xc0 fs/bfs/file.c:177
 generic_perform_write+0x1c9/0x420 mm/filemap.c:3055
 __generic_file_write_iter+0x227/0x590 mm/filemap.c:3180
 generic_file_write_iter+0x36f/0x650 mm/filemap.c:3208
 call_write_iter include/linux/fs.h:1780 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44c/0x630 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f654b0942b9
RSP: 002b:00007ffdea9e0478 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f654b0942b9
RDX: 000000000208e24b RSI: 0000000020000080 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffdea9e04a0 R09: 00007ffdea9e04a0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdea9e049c
R13: 00007ffdea9e04d0 R14: 00007ffdea9e04b0 R15: 000000000000000c
Kernel Offset: disabled
Rebooting in 86400 seconds..