list_del corruption, ffff88810823e848->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:53!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1104 Comm: syz-executor.0 Not tainted 5.10.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:__list_del_entry_valid.cold+0x59/0x6c lib/list_debug.c:53
Code: e8 05 d1 fd ff 0f 0b 4c 89 e6 48 c7 c7 00 23 01 85 e8 f4 d0 fd ff 0f 0b 4c 89 f2 4c 89 e6 48 c7 c7 c0 23 01 85 e8 e0 d0 fd ff <0f> 0b 4c 89 e6 48 c7 c7 e0 24 01 85 e8 cf d0 fd ff 0f 0b 49 83 cf
RSP: 0018:ffffc90000e576d0 EFLAGS: 00010282
RAX: 000000000000004e RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff888107565d00 RSI: ffffffff814c5e8a RDI: fffff520001caecc
RBP: ffffc90000e576e8 R08: 000000000000004e R09: 0000000000000000
R10: 0000000080000001 R11: 6c65645f7473696c R12: ffff88810823e848
R13: dead000000000122 R14: dead000000000100 R15: ffff88810823e850
FS:  00007fad663c96c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000011955a000 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+0x78/0x250 net/9p/trans_fd.c:725
 p9_client_flush+0x379/0x480 net/9p/client.c:677
 p9_client_rpc+0x10e9/0x12f0 net/9p/client.c:784
 p9_client_version net/9p/client.c:952 [inline]
 p9_client_create+0xacd/0x1250 net/9p/client.c:1052
 v9fs_session_init+0x1e6/0x1720 fs/9p/v9fs.c:406
 v9fs_mount+0x7d/0x940 fs/9p/vfs_super.c:126
 legacy_get_tree+0xf6/0x200 fs/fs_context.c:592
 vfs_get_tree+0x88/0x2e0 fs/super.c:1550
 do_new_mount fs/namespace.c:2899 [inline]
 path_mount+0x6ca/0x2110 fs/namespace.c:3229
 do_mount fs/namespace.c:3242 [inline]
 __do_sys_mount fs/namespace.c:3450 [inline]
 __se_sys_mount fs/namespace.c:3427 [inline]
 __x64_sys_mount+0x2aa/0x340 fs/namespace.c:3427
 do_syscall_64+0x32/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fad66888b29
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:00007fad663c90c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fad669a8120 RCX: 00007fad66888b29
RDX: 00000000200001c0 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fad668d447a R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fad669a8120 R15: 00007fffb1e98c88
Modules linked in:
---[ end trace bddfcf50fbbcf43b ]---
RIP: 0010:__list_del_entry_valid.cold+0x59/0x6c lib/list_debug.c:53
Code: e8 05 d1 fd ff 0f 0b 4c 89 e6 48 c7 c7 00 23 01 85 e8 f4 d0 fd ff 0f 0b 4c 89 f2 4c 89 e6 48 c7 c7 c0 23 01 85 e8 e0 d0 fd ff <0f> 0b 4c 89 e6 48 c7 c7 e0 24 01 85 e8 cf d0 fd ff 0f 0b 49 83 cf
RSP: 0018:ffffc90000e576d0 EFLAGS: 00010282
RAX: 000000000000004e RBX: 0000000000000005 RCX: 0000000000000000
RDX: ffff888107565d00 RSI: ffffffff814c5e8a RDI: fffff520001caecc
RBP: ffffc90000e576e8 R08: 000000000000004e R09: 0000000000000000
R10: 0000000080000001 R11: 6c65645f7473696c R12: ffff88810823e848
R13: dead000000000122 R14: dead000000000100 R15: ffff88810823e850
FS:  00007fad663c96c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020404030 CR3: 000000011955a000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400