Bug 2355504 (CVE-2022-49746)

Summary: CVE-2022-49746 kernel: dmaengine: imx-sdma: Fix a possible memory leak in sdma_transfer_init
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-03-27 17:04:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: imx-sdma: Fix a possible memory leak in sdma_transfer_init

If the function sdma_load_context() fails, the sdma_desc will be
freed, but the allocated desc->bd is forgot to be freed.

We already met the sdma_load_context() failure case and the log as
below:
[ 450.699064] imx-sdma 30bd0000.dma-controller: Timeout waiting for CH0 ready
...

In this case, the desc->bd will not be freed without this change.
Comment 1 Robb Gatica 2025-03-27 20:57:38 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032758-CVE-2022-49746-251b@gregkh/T