On Mon, 09 Jan 2023 13:37:11 +0000, ynachum@xxxxxxxxxx wrote:
> When registering a new DMA MR after selecting the best aligned page size
> for it, we iterate over the given sglist to split each entry to smaller,
> aligned to the selected page size, DMA blocks.
>
> In given circumstances where the sg entry and page size fit certain
> sizes and the sg entry is not aligned to the selected page size, the
> total size of the aligned pages we need to cover the sg entry is >= 4GB.
> Under this circumstances, while iterating page aligned blocks, the
> counter responsible for counting how much we advanced from the start of
> the sg entry is overflowed because its type is u32 and we pass 4GB in
> size. This can lead to an infinite loop inside the iterator function
> because the overflow prevents the counter to be larger
> than the size of the sg entry.
>
> [...]
Applied, thanks!
[1/1] RDMA: Fix ib block iterator counter overflow
https://git.kernel.org/rdma/rdma/c/e71b6f877b4070
Best regards,
--
Leon Romanovsky <leon@xxxxxxxxxx>
