CVE-2021-47003: dmaengine: idxd: Fix potential null dereference on pointer status

First published: Wed Feb 28 2024(Updated: )

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")

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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