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| author | Shiraz Saleem <shiraz.saleem@intel.com> | 2019-03-28 11:49:46 -0500 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-03-28 14:13:27 -0300 |
| commit | 93923d309bda99bc52f8cee6ea4774895b18ae5b (patch) | |
| tree | e2fa64df48b595595a7c56f7e12ee29158f675fd /drivers | |
| parent | 41d34865b24c6a0b594b0a69bfe9ea56dff5abcd (diff) | |
| download | linux-stable-93923d309bda99bc52f8cee6ea4774895b18ae5b.tar.gz linux-stable-93923d309bda99bc52f8cee6ea4774895b18ae5b.tar.bz2 linux-stable-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>
Diffstat (limited to 'drivers')
| -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); |