md: md0 stopped.
md: md0 stopped.
md: md0 stopped.
md: md0 stopped.
md: md0 stopped.
WARNING: CPU: 1 PID: 4287 at drivers/md/md.c:7151 md_ioctl+0x2b4a/0x6400 drivers/md/md.c:7137
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4287 Comm: syz-executor3 Not tainted 4.15.0-rc8-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+0x145/0x1e7 lib/dump_stack.c:53
 panic+0x1a9/0x360 kernel/panic.c:183
 __warn.cold.8+0x120/0x154 kernel/panic.c:547
 report_bug+0x1a3/0x220 lib/bug.c:184
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1bc/0x470 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1085
RIP: 0010:md_ioctl+0x2b4a/0x6400 drivers/md/md.c:7151
RSP: 0018:ffff8801c855f560 EFLAGS: 00010202
RAX: ffff8801cac5f708 RBX: 1ffff100390abeb5 RCX: 1ffff1003958bee5
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffed00390abe90
RBP: ffff8801c855fb10 R08: 0000000000000932 R09: 000000000000222e
R10: ffff8801c855fae8 R11: ffff8801cac5f700 R12: 0000000020000080
R13: ffff8801cac5f728 R14: ffff8801d62b58c0 R15: ffff8801cac5f8c8
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x866/0x1b10 block/ioctl.c:601
 block_ioctl+0xd7/0x130 fs/block_dev.c:1860
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x186/0x15d0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x75/0x80 fs/ioctl.c:692
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x455ac9
RSP: 002b:00007f04dcf33c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f04dcf34700 RCX: 0000000000455ac9
RDX: 0000000020000080 RSI: 0000000000000932 RDI: 0000000000000003
RBP: 00007ffea3210160 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea32100df R14: 00007f04dcf349c0 R15: 0000000000000001
Kernel Offset: disabled
Rebooting in 86400 seconds..