list_del corruption, ffff88805e9b8aa8->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8364 Comm: syz-executor.4 Not tainted 4.14.157-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888062108580 task.stack: ffff8880628c8000
RIP: 0010:__list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45
RSP: 0000:ffff8880628cf780 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88805e9b8a80 RCX: 0000000000000000
RDX: 000000000000e8e7 RSI: ffffffff814b6eb5 RDI: ffffed100c519ee6
RBP: ffff8880628cf798 R08: 000000000000004e R09: ffff888062108e20
R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff88805e9b8aa8 R15: ffff88805e9b8af0
FS:  00007fb44941c700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000074a1f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_fd_cancelled+0x34/0x190 net/9p/trans_fd.c:719
 p9_client_flush+0x1b5/0x210 net/9p/client.c:698
 p9_client_rpc+0xf12/0x1180 net/9p/client.c:807
 p9_client_version net/9p/client.c:980 [inline]
 p9_client_create+0x997/0x1120 net/9p/client.c:1088
 v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422
 v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
 mount_fs+0x97/0x2a1 fs/super.c:1237
 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0x417/0x27d0 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3072
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a679
RSP: 002b:00007fb44941bc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a679
RDX: 0000000020000100 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 000000000075c070 R08: 0000000020000600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb44941c6d4
R13: 00000000004c7981 R14: 00000000004de768 R15: 00000000ffffffff
Code: e6 e8 84 97 40 fe 0f 0b 4c 89 f6 48 c7 c7 a0 fc 03 87 e8 73 97 40 fe 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 e0 fb 03 87 e8 5f 97 40 fe <0f> 0b 4c 89 e2 4c 89 f6 48 c7 c7 40 fc 03 87 e8 4b 97 40 fe 0f 
RIP: __list_del_entry_valid.cold+0x23/0x4f lib/list_debug.c:45 RSP: ffff8880628cf780
---[ end trace 21ab58756f0edbd8 ]---