9p: Bad value for 'rfdno'
------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x33f/0x3d0, CPU#0: syz-executor.0/8277
Modules linked in:
CPU: 0 UID: 0 PID: 8277 Comm: syz-executor.0 Not tainted 6.18.0-rc5-next-20251111 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_ns_active_get+0x33f/0x3d0
Code: ab ff 90 0f 0b 90 eb ee e8 3e 55 ab ff 90 0f 0b 90 e9 3f fd ff ff e8 30 55 ab ff 90 0f 0b 90 e9 92 fd ff ff e8 22 55 ab ff 90 <0f> 0b 90 e9 e5 fd ff ff e8 14 55 ab ff 90 0f 0b 90 e9 38 fe ff ff
RSP: 0018:ffff8880409afe08 EFLAGS: 00010216
RAX: 0000000000000a37 RBX: ffff888009c5e138 RCX: ffffc90001403000
RDX: 0000000000040000 RSI: ffffffff81c9553e RDI: 0000000000000001
RBP: ffff88801736a001 R08: 0000000000000001 R09: ffffed1002e6d541
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888017910c40
R13: 0000000000000000 R14: ffff8880095e8000 R15: ffff8880409afe98
FS:  00007f885c9b0700(0000) GS:ffff8880e539c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f885c9b0718 CR3: 000000004741c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 switch_task_namespaces+0x3d/0x110
 __do_sys_setns+0x6b0/0x19a0
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f885f45d107
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f885c9b0128 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 00007f885f56f020 RCX: 00007f885f45d107
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ef
RBP: 0000000000000006 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff8b8c8b8f R14: 00007f885c9b0300 R15: 0000000000022000
 </TASK>
irq event stamp: 949
hardirqs last  enabled at (957): [<ffffffff81548228>] __up_console_sem+0x78/0x80
hardirqs last disabled at (966): [<ffffffff8154820d>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (628): [<ffffffff813bc08c>] handle_softirqs+0x50c/0x770
softirqs last disabled at (619): [<ffffffff813bc424>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
audit: type=1400 audit(1762902702.839:14): avc:  denied  { read } for  pid=8286 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1