list_del corruption, ffff888020c398b0->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: 30215 Comm: syz-executor.3 Not tainted 6.1.28-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53
Code: 4c 89 fe e8 06 36 47 06 0f 0b 48 c7 c7 60 c6 3c 8b 4c 89 fe e8 f5 35 47 06 0f 0b 48 c7 c7 c0 c6 3c 8b 4c 89 fe e8 e4 35 47 06 <0f> 0b 48 c7 c7 20 c7 3c 8b 4c 89 fe e8 d3 35 47 06 0f 0b 48 c7 c7
RSP: 0018:ffffc90003e3f830 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 734b4876203af500
RDX: ffffc9000e143000 RSI: 000000000000cba4 RDI: 000000000000cba5
RBP: ffff888020c39800 R08: ffffffff816d958c R09: fffff520007c7ebd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888036ff8000 R14: dead000000000100 R15: ffff888020c398b0
FS:  00007f4855dbc700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9747d58108 CR3: 0000000066821000 CR4: 00000000003506e0
DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 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+0x95/0x220 net/9p/trans_fd.c:734
 p9_client_flush+0x3b6/0x530 net/9p/client.c:610
 p9_client_rpc+0x82b/0x9e0 net/9p/client.c:730
 p9_client_stat+0x10a/0x270 net/9p/client.c:1677
 v9fs_mount+0x77d/0xc30 fs/9p/vfs_super.c:172
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610
 vfs_get_tree+0x88/0x270 fs/super.c:1553
 do_new_mount+0x28b/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d5/0x3c0 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: 0033:0x7f485728c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4855dbc168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f48573ac120 RCX: 00007f485728c169
RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f48572e7ca1 R08: 0000000020000380 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffef612cb6f R14: 00007f4855dbc300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53
Code: 4c 89 fe e8 06 36 47 06 0f 0b 48 c7 c7 60 c6 3c 8b 4c 89 fe e8 f5 35 47 06 0f 0b 48 c7 c7 c0 c6 3c 8b 4c 89 fe e8 e4 35 47 06 <0f> 0b 48 c7 c7 20 c7 3c 8b 4c 89 fe e8 d3 35 47 06 0f 0b 48 c7 c7
RSP: 0018:ffffc90003e3f830 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 734b4876203af500
RDX: ffffc9000e143000 RSI: 000000000000cba4 RDI: 000000000000cba5
RBP: ffff888020c39800 R08: ffffffff816d958c R09: fffff520007c7ebd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888036ff8000 R14: dead000000000100 R15: ffff888020c398b0
FS:  00007f4855dbc700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9747d58108 CR3: 0000000066821000 CR4: 00000000003506e0
DR0: 00000000ffff070c DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400