diff options
| author |   Shiraz Saleem <shiraz.saleem@intel.com> | 2019-03-28 11:49:44 -0500 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-03-28 14:13:27 -0300 |
| commit | 5f818d676ac455bbc812ffaaf5bf780be5465114 (patch) | |
| tree | 771a34951dad757965e4d609398f5eff95a1e99c /drivers/infiniband/hw/cxgb4 | |
| parent | RDMA/bnxt_re: Use correct sizing on buffers holding page DMA addresses (diff) | |
| download | linux-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 'drivers/infiniband/hw/cxgb4')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/mem.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c index de6697fdffa7..81f5b5b026b1 100644 --- a/drivers/infiniband/hw/cxgb4/mem.c +++ b/drivers/infiniband/hw/cxgb4/mem.c @@ -542,7 +542,7 @@ struct ib_mr *c4iw_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 = alloc_pbl(mhp, n); if (err) goto err_umem_release; |