list_del corruption, ffff888026d9f1f8->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:56!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 24941 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-12991-g7a396820222d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__list_del_entry_valid_or_report+0x104/0x1c0 lib/list_debug.c:56
Code: c7 c7 e0 d0 2f 8b e8 fb 03 fb fc 90 0f 0b 48 c7 c7 40 d1 2f 8b e8 ec 03 fb fc 90 0f 0b 48 c7 c7 a0 d1 2f 8b e8 dd 03 fb fc 90 <0f> 0b 48 89 ca 48 c7 c7 00 d2 2f 8b e8 cb 03 fb fc 90 0f 0b 48 89
RSP: 0018:ffffc9000b9df9c0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff888026d9f138 RCX: ffffc9000a2a5000
RDX: 0000000000000000 RSI: ffffffff816b80c2 RDI: 0000000000000005
RBP: ffff88803736b000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000001 R12: ffff8880358b6030
R13: 0000000000000005 R14: ffff888026d9f1f8 R15: ffff888026d9f200
FS:  00007f7406bbd6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa393179bf8 CR3: 000000007c242000 CR4: 0000000000350ef0
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+0xa2/0x290 net/9p/trans_fd.c:737
 p9_client_flush.isra.0+0x347/0x420 net/9p/client.c:615
 p9_client_rpc+0xae5/0xc10 net/9p/client.c:738
 p9_client_getattr_dotl+0xba/0x1d0 net/9p/client.c:1732
 v9fs_mount+0x8f3/0xcd0 fs/9p/vfs_super.c:158
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x370 fs/super.c:1784
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f740787cda9
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:00007f7406bbd0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f74079ac120 RCX: 00007f740787cda9
RDX: 0000000020000140 RSI: 0000000020000400 RDI: 0000000000000000
RBP: 00007f74078c947a R08: 0000000020000480 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f74079ac120 R15: 00007ffec65aaf98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0x104/0x1c0 lib/list_debug.c:56
Code: c7 c7 e0 d0 2f 8b e8 fb 03 fb fc 90 0f 0b 48 c7 c7 40 d1 2f 8b e8 ec 03 fb fc 90 0f 0b 48 c7 c7 a0 d1 2f 8b e8 dd 03 fb fc 90 <0f> 0b 48 89 ca 48 c7 c7 00 d2 2f 8b e8 cb 03 fb fc 90 0f 0b 48 89
RSP: 0018:ffffc9000b9df9c0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff888026d9f138 RCX: ffffc9000a2a5000
RDX: 0000000000000000 RSI: ffffffff816b80c2 RDI: 0000000000000005
RBP: ffff88803736b000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000001 R12: ffff8880358b6030
R13: 0000000000000005 R14: ffff888026d9f1f8 R15: ffff888026d9f200
FS:  00007f7406bbd6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa393179bf8 CR3: 000000007c242000 CR4: 0000000000350ef0