------------[ cut here ]------------
WARNING: CPU: 0 PID: 19624 at fs/ext4/inode.c:951 ext4_dio_get_block_overwrite fs/ext4/inode.c:951 [inline]
WARNING: CPU: 0 PID: 19624 at fs/ext4/inode.c:951 ext4_dio_get_block_overwrite+0x8d/0xc0 fs/ext4/inode.c:936
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 19624 Comm: syz-executor.1 Not tainted 4.14.146+ #0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 panic+0x1ea/0x3d3 kernel/panic.c:182
 __warn.cold+0x2f/0x3a kernel/panic.c:546
 report_bug+0x20a/0x248 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bf/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:963
RIP: 0010:ext4_dio_get_block_overwrite fs/ext4/inode.c:951 [inline]
RIP: 0010:ext4_dio_get_block_overwrite+0x8d/0xc0 fs/ext4/inode.c:936
RSP: 0018:ffff8881cbd07568 EFLAGS: 00010216
RAX: 0000000000040000 RBX: ffff8881cbd07710 RCX: 00000000000006e2
RDX: ffffffff8175ed8d RSI: ffffc90002531000 RDI: ffff8881d58de618
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000002
R10: fffffbfff6f05b9d R11: ffffffffb782dceb R12: 0000000000000000
R13: ffff88819ffdde00 R14: 0000000000000000 R15: ffff8881aa099a00
 get_more_blocks fs/direct-io.c:718 [inline]
 do_direct_IO fs/direct-io.c:1003 [inline]
 do_blockdev_direct_IO fs/direct-io.c:1336 [inline]
 __blockdev_direct_IO+0x30bd/0xe24e fs/direct-io.c:1422
 ext4_direct_IO_write fs/ext4/inode.c:3715 [inline]
 ext4_direct_IO+0xd32/0x2820 fs/ext4/inode.c:3868
 generic_file_direct_write+0x1e4/0x430 mm/filemap.c:3035
 __generic_file_write_iter+0x209/0x550 mm/filemap.c:3214
 ext4_file_write_iter+0x58f/0xdb0 fs/ext4/file.c:268
 call_write_iter include/linux/fs.h:1788 [inline]
 new_sync_write fs/read_write.c:471 [inline]
 __vfs_write+0x401/0x5a0 fs/read_write.c:484
 vfs_write+0x17f/0x4d0 fs/read_write.c:546
 SYSC_write fs/read_write.c:594 [inline]
 SyS_write+0x102/0x250 fs/read_write.c:586
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459a29
RSP: 002b:00007f9161f34c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a29
RDX: 0000000000000600 RSI: 0000000020000800 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9161f356d4
R13: 00000000004c9257 R14: 00000000004e06b0 R15: 00000000ffffffff
Kernel Offset: 0x34000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..