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author | Shiraz Saleem | 2019-03-28 17:49:46 +0100 |
---|---|---|
committer | Jason Gunthorpe | 2019-03-28 18:13:27 +0100 |
commit | 93923d309bda99bc52f8cee6ea4774895b18ae5b (patch) | |
tree | e2fa64df48b595595a7c56f7e12ee29158f675fd | |
parent | RDMA/mthca: Use correct sizing on buffers holding page DMA addresses (diff) | |
download | kernel-qcow2-linux-93923d309bda99bc52f8cee6ea4774895b18ae5b.tar.gz kernel-qcow2-linux-93923d309bda99bc52f8cee6ea4774895b18ae5b.tar.xz kernel-qcow2-linux-93923d309bda99bc52f8cee6ea4774895b18ae5b.zip |
RDMA/rxe: Use correct sizing on buffers holding page DMA addresses
The buffer that holds the page DMA addresses 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 buffer.
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
-rw-r--r-- | drivers/infiniband/sw/rxe/rxe_mr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c index ec89fbd06c53..f501f72489d8 100644 --- a/drivers/infiniband/sw/rxe/rxe_mr.c +++ b/drivers/infiniband/sw/rxe/rxe_mr.c @@ -179,7 +179,7 @@ int rxe_mem_init_user(struct rxe_pd *pd, u64 start, } mem->umem = umem; - num_buf = umem->nmap; + num_buf = ib_umem_num_pages(umem); rxe_mem_init(access, mem); |