On Wed, Jun 24, 2020 at 08:41:21AM +0000, Suravee Suthikulpanit wrote: > Currently, an integer is used to specify the size in unmap_sg(). > With 2GB worth of pages (512k 4k pages), it requires 31 bits > (i.e. (1 << 19) << 12), which overflows the integer, and ends up > unmapping more pages than intended. Subsequently, this results in > IO_PAGE_FAULT. > > Uses size_t instead of int to pass parameter to __unmap_single(). > > Please note that this patch is only for the stable-kernels tree > because the commit be62dbf554c5 ("iommu/amd: Convert AMD iommu driver > to the dma-iommu api"), which removes the function unmap_sg() > was introduced in v5.5. This patch is not applicable in subsequent > kernel versions. > > Cc: sta...@vger.kernel.org > Cc: iommu@lists.linux-foundation.org > Reported-by: Robert Lippert <rlipp...@google.com> > Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
Acked-by: Joerg Roedel <jroe...@suse.de> _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu