9pnet: Insufficient options for proto=fd
9pnet: Could not find request transport: fs
9pnet: Insufficient options for proto=fd
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: work_struct hint: p9_read_work+0x0/0x1060 net/9p/trans_fd.c:208
WARNING: CPU: 0 PID: 3966 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3966 Comm: syz-executor4 Not tainted 4.18.0-rc3-next-20180706+ #1
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+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996
RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326
Code: 1a 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd e0 8d 1a 88 4c 89 f6 48 c7 c7 80 83 1a 88 e8 76 c9 e3 fd <0f> 0b 83 05 f9 e9 3b 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 
RSP: 0018:ffff88015efe7388 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffc9001268b000
RDX: 0000000000008c92 RSI: ffffffff81634381 RDI: 0000000000000001
RBP: ffff88015efe73c8 R08: ffff88019d28e740 R09: ffffed003b5c3ec2
R10: ffffed003b5c3ec2 R11: ffff8801dae1f617 R12: 0000000000000001
R13: ffffffff88f63c00 R14: ffffffff881a8820 R15: ffffffff814ec5a0
 __debug_check_no_obj_freed lib/debugobjects.c:783 [inline]
 debug_check_no_obj_freed+0x3b2/0x595 lib/debugobjects.c:815
 kfree+0xc7/0x260 mm/slab.c:3812
 p9_fd_close+0x416/0x5b0 net/9p/trans_fd.c:893
 p9_client_create+0xac2/0x16c9 net/9p/client.c:1076
 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
 legacy_get_tree+0x118/0x440 fs/fs_context.c:659
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1751
 do_new_mount fs/namespace.c:2567 [inline]
 do_mount+0x6c1/0x1fb0 fs/namespace.c:2889
 ksys_mount+0x12d/0x140 fs/namespace.c:3105
 __do_sys_mount fs/namespace.c:3119 [inline]
 __se_sys_mount fs/namespace.c:3116 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3116
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: 1d ba 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 b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f7fba067c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7fba0686d4 RCX: 0000000000455e29
RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 000000000072bea0 R08: 0000000020000400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c05ca R14: 00000000004d0070 R15: 0000000000000000
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..