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This code: for_each_sg(sgl, sg, sg_len, i) num_sgs += DIV_ROUND_UP(sg_dma_len(sg), axi_block_len); determines how many hw_desc are allocated. If sg_dma_len(sg)=0 we don't allocate for this sgl. However in the next loop, we will increment loop for this case, and loop gets higher than num_sgs and we trample memory. Signed-off-by: Dom Cobley <popcornmix@gmail.com>
Linux kernel
There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first.
In order to build the documentation, use make htmldocs or
make pdfdocs. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.
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