list_del corruption, ffff8881eced2700->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:47!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1411 Comm: syz-executor.5 Not tainted 5.4.190-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_del_entry_valid+0xbb/0x100 lib/list_debug.c:45
Code: 89 df e8 28 47 70 ff 48 8b 13 4c 39 f2 75 43 b0 01 5b 41 5c 41 5e 41 5f c3 48 c7 c7 a0 29 be 84 4c 89 f6 31 c0 e8 8a 63 ff 01 <0f> 0b 48 c7 c7 00 2a be 84 4c 89 f6 31 c0 e8 77 63 ff 01 0f 0b 48
RSP: 0018:ffff8881eebb7820 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 0612716fc6213f00
RDX: ffffc9000154e000 RSI: 0000000000017bef RDI: 0000000000017bf0
RBP: 0000000000000005 R08: ffffffff814a816a R09: ffffed103edcaa08
R10: ffffed103edcaa08 R11: 1ffff1103edcaa07 R12: dffffc0000000000
R13: ffff8881eced2680 R14: ffff8881eced2700 R15: dead000000000122
FS:  00007fb863dcc700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002057eff8 CR3: 00000001a6886000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:131 [inline]
 list_del include/linux/list.h:139 [inline]
 p9_fd_cancelled+0x71/0x1b0 net/9p/trans_fd.c:722
 p9_client_flush+0x2e6/0x4c0 net/9p/client.c:677
 p9_client_rpc+0x729/0x9e0 net/9p/client.c:784
 p9_client_version+0xfd/0x620 net/9p/client.c:945
 p9_client_create+0x835/0xae0 net/9p/client.c:1055
 v9fs_session_init+0x18c/0x17b0 fs/9p/v9fs.c:406
 v9fs_mount+0x72/0x770 fs/9p/vfs_super.c:124
 legacy_get_tree+0xde/0x170 fs/fs_context.c:647
 vfs_get_tree+0x85/0x260 fs/super.c:1547
 do_new_mount+0x23a/0x500 fs/namespace.c:2843
 do_mount+0x5e2/0xcd0 fs/namespace.c:3163
 ksys_mount+0xc2/0xf0 fs/namespace.c:3372
 __do_sys_mount fs/namespace.c:3386 [inline]
 __se_sys_mount fs/namespace.c:3383 [inline]
 __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3383
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb864c77109
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb863dcc168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb864d8a030 RCX: 00007fb864c77109
RDX: 00000000200001c0 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fb864cd108d R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffbea06def R14: 00007fb863dcc300 R15: 0000000000022000
Modules linked in:
---[ end trace a37bac75a69a61b7 ]---
RIP: 0010:__list_del_entry_valid+0xbb/0x100 lib/list_debug.c:45
Code: 89 df e8 28 47 70 ff 48 8b 13 4c 39 f2 75 43 b0 01 5b 41 5c 41 5e 41 5f c3 48 c7 c7 a0 29 be 84 4c 89 f6 31 c0 e8 8a 63 ff 01 <0f> 0b 48 c7 c7 00 2a be 84 4c 89 f6 31 c0 e8 77 63 ff 01 0f 0b 48
RSP: 0018:ffff8881eebb7820 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 0612716fc6213f00
RDX: ffffc9000154e000 RSI: 0000000000017bef RDI: 0000000000017bf0
RBP: 0000000000000005 R08: ffffffff814a816a R09: ffffed103edcaa08
R10: ffffed103edcaa08 R11: 1ffff1103edcaa07 R12: dffffc0000000000
R13: ffff8881eced2680 R14: ffff8881eced2700 R15: dead000000000122
FS:  00007fb863dcc700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002057eff8 CR3: 00000001a6886000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400