FAT-fs (loop5): Can't find a valid FAT filesystem
9pnet: Insufficient options for proto=fd
FAT-fs (loop5): Unrecognized mount option "
" or missing value
WARNING: CPU: 1 PID: 31220 at mm/slab_common.c:473 kmem_cache_create_usercopy+0xad/0x240 mm/slab_common.c:473
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 31220 Comm: syz-executor3 Not tainted 4.19.0-rc5-next-20180928+ #84
kobject: 'tx-0' (00000000168c3085): kobject_cleanup, parent 0000000091b48dd6
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
kobject: 'tx-0' (00000000168c3085): auto cleanup 'remove' event
kobject: 'tx-0' (00000000168c3085): kobject_uevent_env
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:kmem_cache_create_usercopy+0xad/0x240 mm/slab_common.c:473
Code: 44 89 f0 25 00 60 de 04 45 85 ed 89 45 cc 75 0b 8b 45 d0 85 c0 0f 85 8e 01 00 00 44 39 eb 72 0a 89 d8 44 29 e8 3b 45 d0 73 7e <0f> 0b c7 45 d0 00 00 00 00 4c 8b 45 10 44 89 fa 89 de 4c 89 e7 8b
kobject: 'tx-0' (00000000168c3085): kobject_uevent_env: uevent_suppress caused the event to drop!
RSP: 0018:ffff88018896f5d0 EFLAGS: 00010213
RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffffffff88b04b20
RBP: ffff88018896f608 R08: fffffbfff1283a2d R09: fffffbfff1283a2c
R10: ffff88018896f5c0 R11: ffffffff8941d167 R12: ffffffff88b04b20
R13: 00000000fffffffd R14: 0000000000000000 R15: 0000000000000000
 p9_client_create+0xa58/0x1769 net/9p/client.c:1054
kobject: 'tx-0' (00000000168c3085): auto cleanup kobject_del
kobject: 'tx-0' (00000000168c3085): calling ktype release
 v9fs_session_init+0x217/0x1bb0 fs/9p/v9fs.c:421
kobject: 'tx-0': free name
 v9fs_mount+0x7c/0x8f0 fs/9p/vfs_super.c:135
 legacy_get_tree+0x131/0x460 fs/fs_context.c:718
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1795
kobject: 'queues' (0000000091b48dd6): kobject_cleanup, parent           (null)
 do_new_mount fs/namespace.c:2648 [inline]
 do_mount+0x70c/0x1d90 fs/namespace.c:2974
kobject: 'queues' (0000000091b48dd6): calling ktype release
kobject: 'queues' (0000000091b48dd6): kset_release
 ksys_mount+0x12d/0x140 fs/namespace.c:3190
 __do_sys_mount fs/namespace.c:3204 [inline]
 __se_sys_mount fs/namespace.c:3201 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201
kobject: 'queues': free name
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'lo' (0000000008fa75bf): kobject_uevent_env
RIP: 0033:0x457579
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f242037ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457579
RDX: 00000000200008c0 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 000000000072bfa0 R08: 0000000020000a80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f242037f6d4
R13: 00000000004c28b5 R14: 00000000004d3c90 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..