CVE-2022-49746

Summary

CVE-2022-449746 is a vulnerability affecting the Linux kernel's dmaengine and specifically the imx-sdma component. This issue arises when the function sdma_load_context() fails to load a context for an SDMA descriptor, resulting in the descriptor being freed but the associated desc->bd memory not being released. This oversight could potentially lead to a memory leak, with the log message "[ 450.699064] imx-sdma 30bd0000.dma-controller: Timeout waiting for CH0 ready" indicating the failure of the sdma_load_context() function. With the recent resolution to this issue, the dma_free() call has been added to the sdma_transfer_init() function to free desc->bd in the event of a sdma_load_context() failure, mitigating the risk of memory leaks.

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