list_del corruption, ffff88811c54de88->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: 5105 Comm: syz-executor.4 Not tainted 6.1.25-syzkaller-00067-g4db95aa21ae4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:__list_del_entry_valid+0xea/0x130 lib/list_debug.c:53
Code: 4c 89 fe e8 4c ec 79 02 0f 0b 48 c7 c7 40 6e a9 85 4c 89 fe e8 3b ec 79 02 0f 0b 48 c7 c7 a0 6e a9 85 4c 89 fe e8 2a ec 79 02 <0f> 0b 48 c7 c7 00 6f a9 85 4c 89 fe e8 19 ec 79 02 0f 0b 48 c7 c7
RSP: 0000:ffffc9000debf440 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 0b53339b3857ea00
RDX: ffffc90004429000 RSI: 0000000000000908 RDI: 0000000000000909
RBP: ffffc9000debf460 R08: ffffffff815aad85 R09: fffff52001bd7e25
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff110238a9bc2 R14: dead000000000100 R15: ffff88811c54de88
FS:  00007f725c5136c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000013f56c000 CR4: 00000000003506a0
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_create+0x9e7/0x11c0 net/9p/client.c:1021
 v9fs_session_init+0x1f2/0x1950 fs/9p/v9fs.c:408
 v9fs_mount+0xca/0xb60 fs/9p/vfs_super.c:126
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:610
 vfs_get_tree+0x88/0x290 fs/super.c:1555
 do_new_mount+0x28b/0xac0 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: 0033:0x7f725b87cae9
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:00007f725c5130c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f725b99c1f0 RCX: 00007f725b87cae9
RDX: 00000000200001c0 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f725b8c847a R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f725b99c1f0 R15: 00007ffd5912fda8
 </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 4c ec 79 02 0f 0b 48 c7 c7 40 6e a9 85 4c 89 fe e8 3b ec 79 02 0f 0b 48 c7 c7 a0 6e a9 85 4c 89 fe e8 2a ec 79 02 <0f> 0b 48 c7 c7 00 6f a9 85 4c 89 fe e8 19 ec 79 02 0f 0b 48 c7 c7
RSP: 0000:ffffc9000debf440 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 0b53339b3857ea00
RDX: ffffc90004429000 RSI: 0000000000000908 RDI: 0000000000000909
RBP: ffffc9000debf460 R08: ffffffff815aad85 R09: fffff52001bd7e25
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff110238a9bc2 R14: dead000000000100 R15: ffff88811c54de88
FS:  00007f725c5136c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000013f56c000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400