list_del corruption, ffff88810f3d1cf8->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:55!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 32111 Comm: syz-executor.2 Tainted: G        W         5.10.214-syzkaller-00114-gd3c4d815bf09 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 67 f4 54 02 0f 0b 48 c7 c7 00 1d 60 85 4c 89 f6 e8 56 f4 54 02 0f 0b 48 c7 c7 60 1d 60 85 4c 89 f6 e8 45 f4 54 02 <0f> 0b 48 c7 c7 c0 1d 60 85 4c 89 f6 e8 34 f4 54 02 0f 0b 48 c7 c7
RSP: 0018:ffffc90000ff7468 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 0382ba3f27366900
RDX: ffffc90002163000 RSI: 0000000000001845 RDI: 0000000000001846
RBP: ffffc90000ff7488 R08: ffffffff81521f08 R09: fffff520001feda5
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88810f3d1cf8 R15: dead000000000122
FS:  00007f60b82036c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c447ef988 CR3: 000000013f367000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:132 [inline]
 list_del include/linux/list.h:146 [inline]
 p9_fd_cancelled+0x74/0x1d0 net/9p/trans_fd.c:725
 p9_client_flush+0x392/0x570 net/9p/client.c:680
 p9_client_rpc+0xae6/0x1390 net/9p/client.c:787
 p9_client_create+0x9be/0x1130 net/9p/client.c:1055
 v9fs_session_init+0x1fa/0x19b0 fs/9p/v9fs.c:406
 v9fs_mount+0x75/0x7b0 fs/9p/vfs_super.c:126
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1559
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2910
 path_mount+0x56f/0xcb0 fs/namespace.c:3240
 do_mount fs/namespace.c:3253 [inline]
 __do_sys_mount fs/namespace.c:3461 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3438
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3438
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f60b8ecaf69
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:00007f60b82030c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f60b9002120 RCX: 00007f60b8ecaf69
RDX: 0000000020000280 RSI: 00000000200002c0 RDI: 0000000000000000
RBP: 00007f60b8f286fe R08: 0000000020000480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f60b9002120 R15: 00007fff964c3a98
Modules linked in:
---[ end trace b1ee1c4e2aced55a ]---
RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 67 f4 54 02 0f 0b 48 c7 c7 00 1d 60 85 4c 89 f6 e8 56 f4 54 02 0f 0b 48 c7 c7 60 1d 60 85 4c 89 f6 e8 45 f4 54 02 <0f> 0b 48 c7 c7 c0 1d 60 85 4c 89 f6 e8 34 f4 54 02 0f 0b 48 c7 c7
RSP: 0018:ffffc90000ff7468 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 0382ba3f27366900
RDX: ffffc90002163000 RSI: 0000000000001845 RDI: 0000000000001846
RBP: ffffc90000ff7488 R08: ffffffff81521f08 R09: fffff520001feda5
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88810f3d1cf8 R15: dead000000000122
FS:  00007f60b82036c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9c447ef988 CR3: 000000013f367000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400