CVE-2024-40938 Information

Description

In the Linux kernel the following vulnerability has been resolved:

landlock: Fix d_parent walk

The WARN_ON_ONCE() in collect_domain_accesses() 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 security_path_link().

Do not use source directory’s d_parent when the source directory is the mount point.

[mic: Fix commit message]

Reference

https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11 https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6 https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc