list_del corruption, ffff88018ec050e8->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:47!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 14609 Comm: syz-executor3 Not tainted 4.18.0-next-20180824+ #47
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45
Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 a0 d9 3a 87 e8 0a 05 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 d9 3a 87 e8 f6 04 00 fe <0f> 0b 48 89 de 48 c7 c7 60 da 3a 87 e8 e5 04 00 fe 0f 0b 48 89 de
RSP: 0018:ffff88018db97210 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88018ec050e8 RCX: ffffc90005658000
RDX: 0000000000000000 RSI: ffffffff8163b051 RDI: 0000000000000001
RBP: ffff88018db97228 R08: ffff880192aa6580 R09: ffffed003b625010
R10: ffffed003b625010 R11: ffff8801db128087 R12: dead000000000200
R13: dead000000000100 R14: ffff88018a96e040 R15: dffffc0000000000
FS:  00007fa44b25f700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9e3a6e9000 CR3: 00000001b6c94000 CR4: 00000000001406e0
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_fd_cancelled+0x80/0x2f0 net/9p/trans_fd.c:712
 p9_client_flush+0x255/0x2a0 net/9p/client.c:691
 p9_client_rpc+0x1211/0x1400 net/9p/client.c:800
 p9_client_version net/9p/client.c:971 [inline]
 p9_client_create+0xbbf/0x150c net/9p/client.c:1058
device team0 entered promiscuous mode
device team_slave_0 entered promiscuous mode
 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400
device team_slave_1 entered promiscuous mode
8021q: adding VLAN 0 to HW filter on device team0
 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135
 legacy_get_tree+0x131/0x460 fs/fs_context.c:732
 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746
 do_new_mount fs/namespace.c:2627 [inline]
 do_mount+0x6f9/0x1e30 fs/namespace.c:2951
 ksys_mount+0x12d/0x140 fs/namespace.c:3167
 __do_sys_mount fs/namespace.c:3181 [inline]
 __se_sys_mount fs/namespace.c:3178 [inline]
 __x64_sys_mount+0xbe/0x150 fs/namespace.c:3178
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457089
Code: fd 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa44b25ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa44b25f6d4 RCX: 0000000000457089
RDX: 0000000020000900 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 0000000000930280 R08: 0000000020000840 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d2838 R14: 00000000004c7c60 R15: 0000000000000003
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 4f3dc8622c549e10 ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 lib/list_debug.c:45
Code: 00 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 a0 d9 3a 87 e8 0a 05 00 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 d9 3a 87 e8 f6 04 00 fe <0f> 0b 48 89 de 48 c7 c7 60 da 3a 87 e8 e5 04 00 fe 0f 0b 48 89 de
RSP: 0018:ffff88018db97210 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88018ec050e8 RCX: ffffc90005658000
RDX: 0000000000000000 RSI: ffffffff8163b051 RDI: 0000000000000001
RBP: ffff88018db97228 R08: ffff880192aa6580 R09: ffffed003b625010
R10: ffffed003b625010 R11: ffff8801db128087 R12: dead000000000200
R13: dead000000000100 R14: ffff88018a96e040 R15: dffffc0000000000
FS:  00007fa44b25f700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9e3a6e9000 CR3: 00000001b6c94000 CR4: 00000000001406e0