list_del corruption, ffff888021577cb0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:55!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 11097 Comm: syz-executor.0 Not tainted 6.1.62-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53
Code: 4c 89 fe e8 a6 1d 4b 06 0f 0b 48 c7 c7 c0 f2 3c 8b 4c 89 fe e8 95 1d 4b 06 0f 0b 48 c7 c7 20 f3 3c 8b 4c 89 fe e8 84 1d 4b 06 <0f> 0b 48 c7 c7 80 f3 3c 8b 4c 89 fe e8 73 1d 4b 06 0f 0b 48 c7 c7
RSP: 0018:ffffc90015cff8b0 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 7e730a1a0b94b300
RDX: ffffc90005a31000 RSI: 00000000000074a9 RDI: 00000000000074aa
RBP: ffff888021577c00 R08: ffffffff816e141c R09: fffff52002b9feb5
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88801e47fc00 R14: dead000000000100 R15: ffff888021577cb0
FS:  00007ff16b5306c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ea8aa785b0 CR3: 00000000193cc000 CR4: 00000000003506f0
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+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_getattr_dotl+0xa5/0x190 net/9p/client.c:1730
 v9fs_mount+0x7b1/0xc30 fs/9p/vfs_super.c:161
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1562
 do_new_mount+0x28b/0xae0 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: 0033:0x7ff16a87cae9
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:00007ff16b5300c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff16a99c1f0 RCX: 00007ff16a87cae9
RDX: 0000000020000140 RSI: 0000000020000400 RDI: 0000000000000000
RBP: 00007ff16a8c847a R08: 0000000020000480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff16a99c1f0 R15: 00007ffc8b8243d8
 </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 a6 1d 4b 06 0f 0b 48 c7 c7 c0 f2 3c 8b 4c 89 fe e8 95 1d 4b 06 0f 0b 48 c7 c7 20 f3 3c 8b 4c 89 fe e8 84 1d 4b 06 <0f> 0b 48 c7 c7 80 f3 3c 8b 4c 89 fe e8 73 1d 4b 06 0f 0b 48 c7 c7
RSP: 0018:ffffc90015cff8b0 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 7e730a1a0b94b300
RDX: ffffc90005a31000 RSI: 00000000000074a9 RDI: 00000000000074aa
RBP: ffff888021577c00 R08: ffffffff816e141c R09: fffff52002b9feb5
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88801e47fc00 R14: dead000000000100 R15: ffff888021577cb0
FS:  00007ff16b5306c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ea8aa785b0 CR3: 00000000193cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400