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list_del corruption, ffff88811f6c2398->next is LIST_POISON1 (dead000000000100)
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kernel BUG at lib/list_debug.c:55!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5117 Comm: syz-executor.5 Tainted: G        W          6.1.25-syzkaller-00046-gae5ea9043de1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:__list_del_entry_valid+0xea/0x130 lib/list_debug.c:53
Code: 4c 89 fe e8 cc 10 7a 02 0f 0b 48 c7 c7 80 77 a9 85 4c 89 fe e8 bb 10 7a 02 0f 0b 48 c7 c7 e0 77 a9 85 4c 89 fe e8 aa 10 7a 02 <0f> 0b 48 c7 c7 40 78 a9 85 4c 89 fe e8 99 10 7a 02 0f 0b 48 c7 c7
RSP: 0000:ffffc90001bdf740 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 11246dea7dd53600
RDX: ffffc9000ac71000 RSI: 0000000000002e2a RDI: 0000000000002e2b
RBP: ffffc90001bdf760 R08: ffffffff815a9895 R09: fffff5200037be85
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff11023ed8464 R14: dead000000000100 R15: ffff88811f6c2398
FS:  00007f35049d76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c42e000 CR3: 00000001832b3000 CR4: 00000000003506a0
DR0: 000000000000d8dd DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 list_del include/linux/list.h:148 [inline]
 p9_fd_cancelled+0xa5/0x230 net/9p/trans_fd.c:734
 p9_client_flush+0x3b6/0x530 net/9p/client.c:610
 p9_client_rpc+0x802/0xaa0 net/9p/client.c:730
 p9_client_stat+0x10e/0x390 net/9p/client.c:1677
 v9fs_mount+0x71d/0xb60 fs/9p/vfs_super.c:172
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:610
 vfs_get_tree+0x88/0x290 fs/super.c:1555
 do_new_mount+0x28b/0xac0 fs/namespace.c:3040
 path_mount+0x671/0x1070 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3568
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3503c7cae9
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:00007f35049d70c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3503d9c1f0 RCX: 00007f3503c7cae9
RDX: 0000000020000040 RSI: 0000000020000180 RDI: 0000000000000000
RBP: 00007f3503cc847a R08: 0000000020000300 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3503d9c1f0 R15: 00007ffda794dd08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid+0xea/0x130 lib/list_debug.c:53
Code: 4c 89 fe e8 cc 10 7a 02 0f 0b 48 c7 c7 80 77 a9 85 4c 89 fe e8 bb 10 7a 02 0f 0b 48 c7 c7 e0 77 a9 85 4c 89 fe e8 aa 10 7a 02 <0f> 0b 48 c7 c7 40 78 a9 85 4c 89 fe e8 99 10 7a 02 0f 0b 48 c7 c7
RSP: 0000:ffffc90001bdf740 EFLAGS: 00010246
RAX: 000000000000004e RBX: dead000000000122 RCX: 11246dea7dd53600
RDX: ffffc9000ac71000 RSI: 0000000000002e2a RDI: 0000000000002e2b
RBP: ffffc90001bdf760 R08: ffffffff815a9895 R09: fffff5200037be85
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff11023ed8464 R14: dead000000000100 R15: ffff88811f6c2398
FS:  00007f35049d76c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c42e000 CR3: 00000001832b3000 CR4: 00000000003506a0
DR0: 000000000000d8dd DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400