list_del corruption, ffff888016f521d0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:58!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9018 Comm: syz-executor.1 Not tainted 6.6.0-rc7-syzkaller-00018-gd88520ad73b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:__list_del_entry_valid_or_report+0xe9/0x130 lib/list_debug.c:56
Code: 4c 89 fe e8 69 7d 83 06 0f 0b 48 c7 c7 20 8a 59 8b 4c 89 fe e8 58 7d 83 06 0f 0b 48 c7 c7 80 8a 59 8b 4c 89 fe e8 47 7d 83 06 <0f> 0b 48 c7 c7 e0 8a 59 8b 4c 89 fe e8 36 7d 83 06 0f 0b 48 c7 c7
RSP: 0018:ffffc900033a78b0 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: c85cc8b3f07de100
RDX: ffffc9000c464000 RSI: 0000000000016c2a RDI: 0000000000016c2b
RBP: ffff888016f52110 R08: ffffffff81711cfc R09: 1ffff92000674eb4
R10: dffffc0000000000 R11: fffff52000674eb5 R12: dffffc0000000000
R13: ffff888029e24800 R14: dead000000000100 R15: ffff888016f521d0
FS:  00007ff8f025a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc7272fbe8 CR3: 000000001bcb7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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+0x99/0x220 net/9p/trans_fd.c:733
 p9_client_flush+0x3ba/0x530 net/9p/client.c:613
 p9_client_rpc+0x8a4/0xa90 net/9p/client.c:736
 p9_client_getattr_dotl+0xa9/0x190 net/9p/client.c:1730
 v9fs_mount+0x7cf/0xc60 fs/9p/vfs_super.c:158
 legacy_get_tree+0xef/0x190 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x280 fs/super.c:1750
 do_new_mount+0x28f/0xae0 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff8ef47cae9
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:00007ff8f025a0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff8ef59c120 RCX: 00007ff8ef47cae9
RDX: 0000000020000140 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 00007ff8ef4c847a R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff8ef59c120 R15: 00007fff3ac1e878
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0xe9/0x130 lib/list_debug.c:56
Code: 4c 89 fe e8 69 7d 83 06 0f 0b 48 c7 c7 20 8a 59 8b 4c 89 fe e8 58 7d 83 06 0f 0b 48 c7 c7 80 8a 59 8b 4c 89 fe e8 47 7d 83 06 <0f> 0b 48 c7 c7 e0 8a 59 8b 4c 89 fe e8 36 7d 83 06 0f 0b 48 c7 c7
RSP: 0018:ffffc900033a78b0 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: c85cc8b3f07de100
RDX: ffffc9000c464000 RSI: 0000000000016c2a RDI: 0000000000016c2b
RBP: ffff888016f52110 R08: ffffffff81711cfc R09: 1ffff92000674eb4
R10: dffffc0000000000 R11: fffff52000674eb5 R12: dffffc0000000000
R13: ffff888029e24800 R14: dead000000000100 R15: ffff888016f521d0
FS:  00007ff8f025a6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc7272fbe8 CR3: 000000001bcb7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400