list_del corruption, ffff88807b7d20c0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:56!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6953 Comm: syz-executor.0 Not tainted 6.7.0-rc2-syzkaller-00095-gd3fa86b1a7b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__list_del_entry_valid_or_report+0x104/0x1c0 lib/list_debug.c:56
Code: c7 c7 e0 11 2f 8b e8 6b 26 02 fd 90 0f 0b 48 c7 c7 40 12 2f 8b e8 5c 26 02 fd 90 0f 0b 48 c7 c7 a0 12 2f 8b e8 4d 26 02 fd 90 <0f> 0b 48 89 ca 48 c7 c7 00 13 2f 8b e8 3b 26 02 fd 90 0f 0b 48 89
RSP: 0018:ffffc9000debf970 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88807b7d2000 RCX: ffffc90009dba000
RDX: 0000000000000000 RSI: ffffffff816b0172 RDI: 0000000000000005
RBP: ffff888020dcd000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000001 R12: ffff8880411a4830
R13: 0000000000000005 R14: ffff88807b7d20c0 R15: ffff88807b7d20c8
FS:  00007f8abac086c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556469938 CR3: 000000001e412000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:124 [inline]
 __list_del_entry include/linux/list.h:215 [inline]
 list_del include/linux/list.h:229 [inline]
 p9_fd_cancelled+0xa2/0x290 net/9p/trans_fd.c:737
 p9_client_flush.isra.0+0x347/0x420 net/9p/client.c:615
 p9_client_rpc+0xae5/0xc10 net/9p/client.c:738
 p9_client_stat+0x103/0x250 net/9p/client.c:1680
 v9fs_mount+0x587/0xcd0 fs/9p/vfs_super.c:169
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x370 fs/super.c:1771
 do_new_mount fs/namespace.c:3337 [inline]
 path_mount+0x1492/0x1ed0 fs/namespace.c:3664
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount fs/namespace.c:3863 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f8ab9e7cae9
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:00007f8abac080c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8ab9f9c120 RCX: 00007f8ab9e7cae9
RDX: 0000000020000040 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f8ab9ec847a R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f8ab9f9c120 R15: 00007ffea5e6ed08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x104/0x1c0 lib/list_debug.c:56
Code: c7 c7 e0 11 2f 8b e8 6b 26 02 fd 90 0f 0b 48 c7 c7 40 12 2f 8b e8 5c 26 02 fd 90 0f 0b 48 c7 c7 a0 12 2f 8b e8 4d 26 02 fd 90 <0f> 0b 48 89 ca 48 c7 c7 00 13 2f 8b e8 3b 26 02 fd 90 0f 0b 48 89
RSP: 0018:ffffc9000debf970 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff88807b7d2000 RCX: ffffc90009dba000
RDX: 0000000000000000 RSI: ffffffff816b0172 RDI: 0000000000000005
RBP: ffff888020dcd000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000001 R12: ffff8880411a4830
R13: 0000000000000005 R14: ffff88807b7d20c0 R15: ffff88807b7d20c8
FS:  00007f8abac086c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556469938 CR3: 000000001e412000 CR4: 0000000000350ef0