kernel: cachefiles: fix dentry leak in cachefiles_open_file()

In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix dentry leak in cachefilesopenfile A dentry leak may be caused when a lookup cookie and a cull are concurrent: P1 | P2 ----------------------------------------------------------- cachefileslookupcookie...

CVE-2024-49870

In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix dentry leak in cachefilesopenfile A dentry leak may be caused when a lookup cookie and a cull are concurrent: P1 | P2 ----------------------------------------------------------- cachefileslookupcookie...