list_del corruption, ffff8880791db610->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:58!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 11899 Comm: syz.0.1709 Not tainted 6.12.0-rc3-syzkaller-00389-g3d5ad2d4eca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56
Code: e8 01 33 00 07 90 0f 0b 48 c7 c7 60 05 61 8c 4c 89 fe e8 ef 32 00 07 90 0f 0b 48 c7 c7 c0 05 61 8c 4c 89 fe e8 dd 32 00 07 90 <0f> 0b 48 c7 c7 20 06 61 8c 4c 89 fe e8 cb 32 00 07 90 0f 0b 48 c7
RSP: 0018:ffffc90003ebf710 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 1ef2db49c12a1400
RDX: ffffc9000e734000 RSI: 00000000000075d7 RDI: 00000000000075d8
RBP: ffff8880791db550 R08: ffffffff8174afec R09: 1ffff920007d7e7c
R10: dffffc0000000000 R11: fffff520007d7e7d R12: dffffc0000000000
R13: ffff88801ff3dc00 R14: dead000000000100 R15: ffff8880791db610
FS:  00007f46b7b466c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556a0d5648 CR3: 000000007f0a2000 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+0x99/0x220 net/9p/trans_fd.c:736
 p9_client_flush+0x3c4/0x540 net/9p/client.c:618
 p9_client_rpc+0x8d4/0xac0 net/9p/client.c:741
 p9_client_stat+0x10e/0x280 net/9p/client.c:1731
 v9fs_fid_iget+0x23c/0x5f0 fs/9p/vfs_inode.c:399
 v9fs_get_inode_from_fid fs/9p/v9fs.h:233 [inline]
 v9fs_mount+0x6ee/0xaa0 fs/9p/vfs_super.c:142
 legacy_get_tree+0xf0/0x190 fs/fs_context.c:662
 vfs_get_tree+0x92/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f46b6d7dff9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f46b7b46038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f46b6f36130 RCX: 00007f46b6d7dff9
RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00007f46b6df0296 R08: 0000000020000600 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f46b6f36130 R15: 00007ffecd601398
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0xf4/0x140 lib/list_debug.c:56
Code: e8 01 33 00 07 90 0f 0b 48 c7 c7 60 05 61 8c 4c 89 fe e8 ef 32 00 07 90 0f 0b 48 c7 c7 c0 05 61 8c 4c 89 fe e8 dd 32 00 07 90 <0f> 0b 48 c7 c7 20 06 61 8c 4c 89 fe e8 cb 32 00 07 90 0f 0b 48 c7
RSP: 0018:ffffc90003ebf710 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 1ef2db49c12a1400
RDX: ffffc9000e734000 RSI: 00000000000075d7 RDI: 00000000000075d8
RBP: ffff8880791db550 R08: ffffffff8174afec R09: 1ffff920007d7e7c
R10: dffffc0000000000 R11: fffff520007d7e7d R12: dffffc0000000000
R13: ffff88801ff3dc00 R14: dead000000000100 R15: ffff8880791db610
FS:  00007f46b7b466c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556a0d5648 CR3: 000000007f0a2000 CR4: 0000000000350ef0