CVE-2021-47003 Information

Description

In the Linux kernel the following vulnerability has been resolved:

dmaengine: idxd: Fix potential null dereference on pointer status

There are calls to idxd_cmd_exec that pass a null status pointer however a recent commit has added an assignment to status that can end up with a null pointer dereference. The function expects a null status pointer sometimes as there is a later assignment to status where status is first null checked. Fix the issue by null checking status before making the assignment.

Addresses-Coverity: (\Explicit null dereferenced)

Reference

https://git.kernel.org/stable/c/5756f757c72501ef1a16f5f63f940623044180e9 https://git.kernel.org/stable/c/2280b4cc29d8cdd2be3d1b2d1ea4f958e2131c97 https://git.kernel.org/stable/c/7bc402f843e7817a4a808e7b9ab0bcd7ffd55bfa https://git.kernel.org/stable/c/28ac8e03c43dfc6a703aa420d18222540b801120