CVE-2021-47645 Information

Description

In the Linux kernel the following vulnerability has been resolved:

media: staging: media: zoran: calculate the right buffer number for zoran_reap_stat_com

On the case tmp_dcim=1 the index of buffer is miscalculated. This generate a NULL pointer dereference later.

So let’s fix the calcul and add a check to prevent this to reappear.

Reference

https://git.kernel.org/stable/c/20811bbe685ca3eddd34b0c750860427d7030910 https://git.kernel.org/stable/c/20db2ed1e2f9fcd417fa67853e5154f0c2537d6c https://git.kernel.org/stable/c/7e76f3ed7ab2ae026c6ef9cc23096a7554af8c52 https://git.kernel.org/stable/c/bafec1a6ba4b187a7fcdcfce0faebdc623d4ef8e https://git.kernel.org/stable/c/e3b86f4e558cea9eed71d894df2f19b10d60a207