BFS-fs: bfs_fill_super(): loop0 is unclean, continuing
WARNING: CPU: 0 PID: 4469 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4469 Comm: syzkaller839510 Not tainted 4.16.0+ #11
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+0x1a7/0x27d lib/dump_stack.c:53
 panic+0x1f8/0x42c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012
RSP: 0018:ffff8801b1f37908 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801b5cd9004 RCX: ffffffff820964ba
RDX: 1ffff10039c57cc4 RSI: 0000000000000000 RDI: 0000000000800000
RBP: ffff8801b1f37908 R08: ffffed003b604f99 R09: ffffed003b604f99
R10: 0000000000000001 R11: ffffed003b604f98 R12: 00000000007fffff
R13: ffff8801b5cd9000 R14: 00000000014080c0 R15: ffff8801d96b21c0
 __do_kmalloc mm/slab.c:3701 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3715
 kmalloc include/linux/slab.h:517 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 bfs_fill_super+0x3d3/0xea0 fs/bfs/inode.c:362
 mount_bdev+0x2b7/0x370 fs/super.c:1119
 bfs_mount+0x34/0x40 fs/bfs/inode.c:465
 mount_fs+0x66/0x2d0 fs/super.c:1222
 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:2509 [inline]
 do_new_mount fs/namespace.c:2512 [inline]
 do_mount+0xea4/0x2bb0 fs/namespace.c:2842
 SYSC_mount fs/namespace.c:3058 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3035
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x442daa
RSP: 002b:00007ffe5c6d37f8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000001c00 RCX: 0000000000442daa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe5c6d3800
RBP: 0000000000000003 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000004
R13: 0000000000401ca0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..