In the Linux kernel, the following vulnerability has been resolved: landlock: Fix dparent walk The WARNONONCE() in collectdomainaccesses() can be triggered when trying to link a root mount point. This cannot work in practice because this directory is mounted, but the VFS check is done after the call to securitypathlink(). Do not use source directory's dparent when the source directory is the mount point. [mic: Fix commit message]