CVE-2022-49084 Information

Description

In the Linux kernel the following vulnerability has been resolved:

qede: confirm skb is allocated before using

qede_build_skb() assumes build_skb() always works and goes straight to skb_reserve(). However build_skb() can fail under memory pressure. This results in a kernel panic because the skb to reserve is NULL.

Add a check in case build_skb() failed to allocate and return NULL.

The NULL return is handled correctly in callers to qede_build_skb().

Reference

https://git.kernel.org/stable/c/034a92c6a81048128fc7b18d278d52438a13902a https://git.kernel.org/stable/c/4e910dbe36508654a896d5735b318c0b88172570 https://git.kernel.org/stable/c/8928239e5e2e460d95b8a0b89f61671625e7ece0 https://git.kernel.org/stable/c/9648adb1b3ece55c657d3a4f52bfee663b710dfe https://git.kernel.org/stable/c/b2d6b3db9d1cf80908964036dbe1c52a86b1afb1 https://git.kernel.org/stable/c/c9bdce2359b5f4986eb38d1e81865b3586cc20d2 https://git.kernel.org/stable/c/e1fd0c42acfa22bb34d2ab6a111484f466ab8093