CVE-2021-47298 Information

Description

In the Linux kernel the following vulnerability has been resolved:

bpf sockmap: Fix potential memory leak on unlikely error case

If skb_linearize is needed and fails we could leak a msg on the error handling. To fix ensure we kfree the msg block before returning error. Found during code review.

Reference

https://git.kernel.org/stable/c/715f378f42909c401ec043f5150c4fdf57fb8889 https://git.kernel.org/stable/c/6c508a1c6c62793dc6e6872cad4b200097bab7c9 https://git.kernel.org/stable/c/7e6b27a69167f97c56b5437871d29e9722c3e470