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authorShiraz Saleem <shiraz.saleem@intel.com>2019-03-28 11:49:44 -0500
committerJason Gunthorpe <jgg@mellanox.com>2019-03-28 14:13:27 -0300
commit5f818d676ac455bbc812ffaaf5bf780be5465114 (patch)
tree771a34951dad757965e4d609398f5eff95a1e99c /drivers/infiniband/hw/cxgb3/iwch_provider.c
parentRDMA/bnxt_re: Use correct sizing on buffers holding page DMA addresses (diff)
downloadlinux-dev-5f818d676ac455bbc812ffaaf5bf780be5465114.tar.xz
linux-dev-5f818d676ac455bbc812ffaaf5bf780be5465114.zip
RDMA/cxbg: Use correct sizing on buffers holding page DMA addresses
The PBL array that hold the page DMA address is sized off umem->nmap. This can potentially cause out of bound accesses on the PBL array when iterating the umem DMA-mapped SGL. This is because if umem pages are combined, umem->nmap can be much lower than the number of system pages in umem. Use ib_umem_num_pages() to size this array. Cc: Potnuri Bharat Teja <bharat@chelsio.com> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to '')
-rw-r--r--drivers/infiniband/hw/cxgb3/iwch_provider.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index c9a1fb323b5c..21aac6bca06f 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -539,7 +539,7 @@ static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
shift = PAGE_SHIFT;
- n = mhp->umem->nmap;
+ n = ib_umem_num_pages(mhp->umem);
err = iwch_alloc_pbl(mhp, n);
if (err)