From: Jason Gunthorpe <jgg@nvidia.com> stable inclusion from stable-v6.6.143 commit 8fe0231adebe086c8a459c790944ac026cd99c6e category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/15827 CVE: CVE-2026-53133 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 15fe76e23615f502d051ef0768f86babaf08746c ] When the iommu is used the linearization of the mapping can give a single block that is very large split across multiple SG entries. When __rdma_block_iter_next() reassembles the split SG entries it is overflowing the 32 bit stack values and computed the wrong DMA addresses for blocks after the truncation. Use the right types to hold DMA addresses. Link: https://patch.msgid.link/r/1-v1-88303e9e509f+f7-ib_umem_types_jgg@nvidia.com Cc: stable@vger.kernel.org Fixes: a808273a495c ("RDMA/verbs: Add a DMA iterator to return aligned contiguous memory blocks") Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Xia Fukun <xiafukun@huawei.com> --- drivers/infiniband/core/iter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/iter.c b/drivers/infiniband/core/iter.c index 8e543d100657..3ed351e8fcf6 100644 --- a/drivers/infiniband/core/iter.c +++ b/drivers/infiniband/core/iter.c @@ -19,8 +19,8 @@ EXPORT_SYMBOL(__rdma_block_iter_start); bool __rdma_block_iter_next(struct ib_block_iter *biter) { - unsigned int block_offset; - unsigned int delta; + dma_addr_t block_offset; + dma_addr_t delta; if (!biter->__sg_nents || !biter->__sg) return false; -- 2.34.1