kernel: smb: client: fix potential UAF in cifs_stats_proc_show()

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in cifsstatsprocshow The Linux kernel CVE team has assigned CVE-2024-35867 to this issue. Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051939-CVE-2024-35867-15e3@gregkh/T...