md: md0 stopped.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 18986 at drivers/md/md.c:7177 md_ioctl+0x33c5/0x4920 drivers/md/md.c:7177
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 18986 Comm: syz-executor.4 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x2f/0x30 kernel/panic.c:547
 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+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:md_ioctl+0x33c5/0x4920 drivers/md/md.c:7177
RSP: 0018:ffff888201e2fa50 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 1ffff110403c5f51 RCX: ffffc9000ae7e000
RDX: 0000000000000142 RSI: ffffffff84793475 RDI: ffff88809af00be8
RBP: ffff88809af00bc0 R08: ffffffff8a381c00 R09: ffffffff89e7d980
R10: ffff888201e2fa50 R11: ffff8881ff974280 R12: 0000000000000000
R13: ffff8880a6ebb180 R14: ffff88809af00d88 R15: 0000000000000932
 __blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x91d/0x17c0 block/ioctl.c:594
 block_ioctl+0xd9/0x120 fs/block_dev.c:1881
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45ca59
RSP: 002b:00007f8a43bf4c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e1be0 RCX: 000000000045ca59
RDX: 0000000000000000 RSI: 0000000000000932 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000225 R14: 00000000004c46f3 R15: 00007f8a43bf56d4
Kernel Offset: disabled
Rebooting in 86400 seconds..