list_del corruption, ffff88810ec25780->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: 2084 Comm: syz-executor.5 Not tainted 5.10.187-syzkaller-00057-g8a427269c016 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 d7 0c 54 02 0f 0b 48 c7 c7 80 f0 5f 85 4c 89 f6 e8 c6 0c 54 02 0f 0b 48 c7 c7 e0 f0 5f 85 4c 89 f6 e8 b5 0c 54 02 <0f> 0b 48 c7 c7 40 f1 5f 85 4c 89 f6 e8 a4 0c 54 02 0f 0b 48 c7 c7
RSP: 0018:ffffc900065ef468 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 54a811121e189100
RDX: ffffc90003713000 RSI: 0000000000000ec2 RDI: 0000000000000ec3
RBP: ffffc900065ef488 R08: ffffffff815211c8 R09: ffffed103ee2a600
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88810ec25780 R15: dead000000000122
FS:  00007f065d1886c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a2e774a60 CR3: 000000011d44e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:132 [inline]
 list_del include/linux/list.h:146 [inline]
 p9_fd_cancelled+0x74/0x1d0 net/9p/trans_fd.c:725
 p9_client_flush+0x392/0x570 net/9p/client.c:677
 p9_client_rpc+0xae6/0x1380 net/9p/client.c:784
 p9_client_create+0x9be/0x1130 net/9p/client.c:1052
 v9fs_session_init+0x1fa/0x19b0 fs/9p/v9fs.c:406
 v9fs_mount+0x75/0x7b0 fs/9p/vfs_super.c:126
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:592
 vfs_get_tree+0x88/0x290 fs/super.c:1550
 do_new_mount+0x28b/0xad0 fs/namespace.c:2899
 path_mount+0x56f/0xcb0 fs/namespace.c:3229
 do_mount fs/namespace.c:3242 [inline]
 __do_sys_mount fs/namespace.c:3450 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3427
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3427
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f065e447b29
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:00007f065d1880c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f065e567120 RCX: 00007f065e447b29
RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f065e49347a R08: 0000000020000600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f065e567120 R15: 00007ffcb997f0c8
Modules linked in:
---[ end trace b931327b41cef856 ]---
RIP: 0010:__list_del_entry_valid+0xea/0x120 lib/list_debug.c:53
Code: 4c 89 f6 e8 d7 0c 54 02 0f 0b 48 c7 c7 80 f0 5f 85 4c 89 f6 e8 c6 0c 54 02 0f 0b 48 c7 c7 e0 f0 5f 85 4c 89 f6 e8 b5 0c 54 02 <0f> 0b 48 c7 c7 40 f1 5f 85 4c 89 f6 e8 a4 0c 54 02 0f 0b 48 c7 c7
RSP: 0018:ffffc900065ef468 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000100 RCX: 54a811121e189100
RDX: ffffc90003713000 RSI: 0000000000000ec2 RDI: 0000000000000ec3
RBP: ffffc900065ef488 R08: ffffffff815211c8 R09: ffffed103ee2a600
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88810ec25780 R15: dead000000000122
FS:  00007f065d1886c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a2e774a60 CR3: 000000011d44e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400