------------[ cut here ]------------
WARNING: CPU: 0 PID: 12925 at lib/list_debug.c:53 __list_del_entry+0x70/0xe0 lib/list_debug.c:51()
list_del corruption, ffff8800afb38028->next is LIST_POISON1 (dead000000100100)
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 12925 Comm: syz-executor3 Not tainted 4.1.0 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffffffff82be6aea ffff8800afb379c8 ffffffff8246f079 0000000000000032
 ffffffff82b8ea6e ffff8800afb37a48 ffffffff8246b33d 0000000000000000
 ffffffff00000008 ffff8800afb37a58 ffff8800afb379f8 ffffffff8320bbc8
Call Trace:
 [<ffffffff8246f079>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff8246f079>] dump_stack+0x4c/0x65 lib/dump_stack.c:50
 [<ffffffff8246b33d>] panic+0xcd/0x211 kernel/panic.c:111
 [<ffffffff81169deb>] warn_slowpath_common+0xbb/0xc0 kernel/panic.c:442
 [<ffffffff81169e31>] warn_slowpath_fmt+0x41/0x50 kernel/panic.c:458
 [<ffffffff81872420>] __list_del_entry+0x70/0xe0 lib/list_debug.c:51
 [<ffffffff818724a1>] list_del+0x11/0x40 lib/list_debug.c:77
 [<ffffffff82401a4d>] p9_fd_cancel+0x4d/0x60 net/9p/trans_fd.c:696
 [<ffffffff823fac79>] p9_client_rpc+0x539/0x7f0 net/9p/client.c:777
 [<ffffffff823fba36>] p9_client_version net/9p/client.c:950 [inline]
 [<ffffffff823fba36>] p9_client_create+0x266/0x700 net/9p/client.c:1043
 [<ffffffff816458c5>] v9fs_session_init+0xe5/0x720 fs/9p/v9fs.c:353
 [<ffffffff81640d53>] v9fs_mount+0x53/0x330 fs/9p/vfs_super.c:130
 [<ffffffff812f0ff3>] mount_fs+0x33/0x190 fs/super.c:1108
 [<ffffffff81313716>] vfs_kern_mount+0x66/0x160 fs/namespace.c:937
 [<ffffffff81316639>] do_new_mount fs/namespace.c:2368 [inline]
 [<ffffffff81316639>] do_mount+0x1f9/0xba0 fs/namespace.c:2684
 [<ffffffff8131732b>] SYSC_mount fs/namespace.c:2874 [inline]
 [<ffffffff8131732b>] SyS_mount+0x8b/0xe0 fs/namespace.c:2852
 [<ffffffff8247ee72>] system_call_fastpath+0x16/0x7a
Kernel Offset: disabled