list_del corruption, ffff8881238fb078->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: 20915 Comm: syz.0.5481 Tainted: G        W         5.10.216-syzkaller-00510-ga4a2b7a82ee4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 ce 29 55 02 0f 0b 48 c7 c7 c0 21 60 85 4c 89 f6 e8 bd 29 55 02 0f 0b 48 c7 c7 20 22 60 85 4c 89 f6 e8 ac 29 55 02 <0f> 0b 48 c7 c7 80 22 60 85 4c 89 f6 e8 9b 29 55 02 0f 0b 48 c7 c7
RSP: 0018:ffffc900000f7468 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 2db1f2d3c57e7100
RDX: ffffc900052d3000 RSI: 000000000000071e RDI: 000000000000071f
RBP: ffffc900000f7488 R08: ffffffff81521e68 R09: ffffed103ee2a5f8
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8881238fb078 R15: dead000000000122
FS:  00007f35bc0686c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555572cf4a8 CR3: 000000010a5cf000 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: 0033:0x7f35bce28b29
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f35bc068048 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f35bcfb7140 RCX: 00007f35bce28b29
RDX: 0000000020000b80 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f35bcea9756 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f35bcfb7140 R15: 00007fff61136ab8
Modules linked in:
---[ end trace e4a5ebd11039c19e ]---
RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 ce 29 55 02 0f 0b 48 c7 c7 c0 21 60 85 4c 89 f6 e8 bd 29 55 02 0f 0b 48 c7 c7 20 22 60 85 4c 89 f6 e8 ac 29 55 02 <0f> 0b 48 c7 c7 80 22 60 85 4c 89 f6 e8 9b 29 55 02 0f 0b 48 c7 c7
RSP: 0018:ffffc900000f7468 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 2db1f2d3c57e7100
RDX: ffffc900052d3000 RSI: 000000000000071e RDI: 000000000000071f
RBP: ffffc900000f7488 R08: ffffffff81521e68 R09: ffffed103ee2a5f8
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8881238fb078 R15: dead000000000122
FS:  00007f35bc0686c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555572cf4a8 CR3: 000000010a5cf000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400