list_del corruption, ffff8881e7b0f220->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: 12362 Comm: syz-executor.4 Not tainted 5.4.233-syzkaller-00019-gd5ed2ca98e48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 0e 5c 0f 02 0f 0b 48 c7 c7 20 bb d9 84 4c 89 f6 e8 fd 5b 0f 02 0f 0b 48 c7 c7 80 bb d9 84 4c 89 f6 e8 ec 5b 0f 02 <0f> 0b 48 c7 c7 e0 bb d9 84 4c 89 f6 e8 db 5b 0f 02 0f 0b 48 c7 c7
RSP: 0018:ffff8881e609f478 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: e0b8f08c5f193900
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: 0000000000000005 R08: ffffffff814ca536 R09: ffffed103edeaa08
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881e7b0f1a0 R14: ffff8881e7b0f220 R15: dead000000000122
FS:  00007fa73408c700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002002f030 CR3: 00000001edf57000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:131 [inline]
 list_del include/linux/list.h:139 [inline]
 p9_fd_cancelled+0x72/0x1b0 net/9p/trans_fd.c:725
 p9_client_flush+0x392/0x570 net/9p/client.c:677
 p9_client_rpc+0xae0/0x1410 net/9p/client.c:784
 p9_client_version net/9p/client.c:942 [inline]
 p9_client_create+0x9be/0x11a0 net/9p/client.c:1052
 v9fs_session_init+0x1fa/0x19b0 fs/9p/v9fs.c:406
 v9fs_mount+0x72/0x770 fs/9p/vfs_super.c:124
 legacy_get_tree+0xdf/0x170 fs/fs_context.c:647
 vfs_get_tree+0x85/0x260 fs/super.c:1547
 do_new_mount+0x292/0x570 fs/namespace.c:2843
 do_mount+0x688/0xdd0 fs/namespace.c:3163
 ksys_mount+0xc2/0xf0 fs/namespace.c:3372
 __do_sys_mount fs/namespace.c:3386 [inline]
 __se_sys_mount fs/namespace.c:3383 [inline]
 __x64_sys_mount+0xb1/0xc0 fs/namespace.c:3383
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Modules linked in:
---[ end trace e79b606a6a1a3c6d ]---
RIP: 0010:__list_del_entry_valid+0xe5/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 0e 5c 0f 02 0f 0b 48 c7 c7 20 bb d9 84 4c 89 f6 e8 fd 5b 0f 02 0f 0b 48 c7 c7 80 bb d9 84 4c 89 f6 e8 ec 5b 0f 02 <0f> 0b 48 c7 c7 e0 bb d9 84 4c 89 f6 e8 db 5b 0f 02 0f 0b 48 c7 c7
RSP: 0018:ffff8881e609f478 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: e0b8f08c5f193900
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000
RBP: 0000000000000005 R08: ffffffff814ca536 R09: ffffed103edeaa08
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881e7b0f1a0 R14: ffff8881e7b0f220 R15: dead000000000122
FS:  00007fa73408c700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002002f030 CR3: 00000001edf57000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400