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Change History

In the Linux kernel, the following vulnerability has been resolved:

Avoid hw_desc array overrun in dw-axi-dmac

I have a use case where nr_buffers = 3 and in which each descriptor is composed by 3
segments, resulting in the DMA channel descs_allocated to be 9. Since axi_desc_put()
handles the hw_desc considering the descs_allocated, this scenario would result in a
kernel panic (hw_desc array will be overrun).

To fix this, the proposal is to add a new member to the axi_dma_desc structure,
where

kernel.org https://git.kernel.org/stable/c/333e11bf47fa8d477db90e2900b1ed3c9ae9b697 [No types assigned]

kernel.org https://git.kernel.org/stable/c/7c3bb96a20cd8db3b8824b2ff08b6cde4505c7e5 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9004784e8d68bcd1ac1376407ba296fa28f04dbe [No types assigned]

kernel.org https://git.kernel.org/stable/c/dd42570018f5962c10f215ad9c21274ed5d3541e [No types assigned]

kernel.org https://git.kernel.org/stable/c/e151ae1ee065cf4b8ce4394ddb9d9c8df6370c66 [No types assigned]