list_del corruption, ffff8881f27206b8->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:55!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 19491 Comm: syz-executor.2 Not tainted 6.1.57-syzkaller-00058-gcee8ebf7c508 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__list_del_entry_valid+0xea/0x130 lib/list_debug.c:53
Code: 4c 89 fe e8 2c b9 7b 02 0f 0b 48 c7 c7 40 b0 a9 85 4c 89 fe e8 1b b9 7b 02 0f 0b 48 c7 c7 a0 b0 a9 85 4c 89 fe e8 0a b9 7b 02 <0f> 0b 48 c7 c7 00 b1 a9 85 4c 89 fe e8 f9 b8 7b 02 0f 0b 48 c7 c7
RSP: 0018:ffffc9000b357740 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 2e7a2c0844f94b00
RDX: ffffc90004488000 RSI: 000000000000beec RDI: 000000000000beed
RBP: ffffc9000b357760 R08: ffffffff815acc95 R09: fffff5200166ae85
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff1103e4e40c8 R14: dead000000000100 R15: ffff8881f27206b8
FS:  00007f43d54f36c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f37e4570700 CR3: 000000018ae4b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 list_del include/linux/list.h:148 [inline]
 p9_fd_cancelled+0xa5/0x230 net/9p/trans_fd.c:734
 p9_client_flush+0x3b6/0x530 net/9p/client.c:610
 p9_client_rpc+0x802/0xaa0 net/9p/client.c:730
 p9_client_stat+0x10e/0x390 net/9p/client.c:1677
 v9fs_mount+0x71d/0xb60 fs/9p/vfs_super.c:172
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:632
 vfs_get_tree+0x88/0x290 fs/super.c:1564
 do_new_mount+0x28b/0xad0 fs/namespace.c:3040
 path_mount+0x671/0x1070 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3568
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f43d487cba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f43d54f30c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f43d499c120 RCX: 00007f43d487cba9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007f43d48c847a R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f43d499c120 R15: 00007ffcd8274fc8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid+0xea/0x130 lib/list_debug.c:53
Code: 4c 89 fe e8 2c b9 7b 02 0f 0b 48 c7 c7 40 b0 a9 85 4c 89 fe e8 1b b9 7b 02 0f 0b 48 c7 c7 a0 b0 a9 85 4c 89 fe e8 0a b9 7b 02 <0f> 0b 48 c7 c7 00 b1 a9 85 4c 89 fe e8 f9 b8 7b 02 0f 0b 48 c7 c7
RSP: 0018:ffffc9000b357740 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 2e7a2c0844f94b00
RDX: ffffc90004488000 RSI: 000000000000beec RDI: 000000000000beed
RBP: ffffc9000b357760 R08: ffffffff815acc95 R09: fffff5200166ae85
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff1103e4e40c8 R14: dead000000000100 R15: ffff8881f27206b8
FS:  00007f43d54f36c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f37e4570700 CR3: 000000018ae4b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400