CVE-2022-49650 Information

Description

In the Linux kernel the following vulnerability has been resolved:

dmaengine: qcom: bam_dma: fix runtime PM underflow

Commit dbad41e7bb5f (\dmaengine: qcom: bam_dma: check if the runtime pm enabled) caused unbalanced pm_runtime_get/put() calls when the bam is controlled remotely. This commit reverts it and just enables pm_runtime in all cases the clk_ functions already just nop when the clock is NULL.

Also clean up a bit by removing unnecessary bamclk null checks.

Reference

https://git.kernel.org/stable/c/0ac9c3dd0d6fe293cd5044cfad10bec27d171e4e https://git.kernel.org/stable/c/2f6ded79068cac8cff41d5d5632564165d98ee12 https://git.kernel.org/stable/c/b702a1077b51fcb39507cc3bd39206f539319a96