diff options
| author | Shiraz Saleem <shiraz.saleem@intel.com> | 2021-06-25 19:23:28 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-06-25 20:08:30 +0300 |
| commit | 46308965ae6fdc7c25deb2e8c048510ae51bbe66 (patch) | |
| tree | 676f1721fc30843bde5abf55967a8504b2b7b872 /drivers/infiniband | |
| parent | 36941dfe0e8c3e2da7851b9648fd74bd3a3e78ce (diff) | |
| download | linux-46308965ae6fdc7c25deb2e8c048510ae51bbe66.tar.xz | |
RDMA/irdma: Check contents of user-space irdma_mem_reg_req object
The contents of user-space req object is used in array indexing in
irdma_handle_q_mem without checking for valid values.
Guard against bad input on each of these req object pages by limiting them
to number of pages that make up the region.
Link: https://lore.kernel.org/r/20210625162329.1654-2-tatyana.e.nikolova@intel.com
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1505160 ("TAINTED_SCALAR")
Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/irdma/verbs.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c index 5bb46a4d26ff..9712f6902ba8 100644 --- a/drivers/infiniband/hw/irdma/verbs.c +++ b/drivers/infiniband/hw/irdma/verbs.c @@ -2358,12 +2358,10 @@ static int irdma_handle_q_mem(struct irdma_device *iwdev, struct irdma_cq_mr *cqmr = &iwpbl->cq_mr; struct irdma_hmc_pble *hmc_p; u64 *arr = iwmr->pgaddrmem; - u32 pg_size; + u32 pg_size, total; int err = 0; - int total; bool ret = true; - total = req->sq_pages + req->rq_pages + req->cq_pages; pg_size = iwmr->page_size; err = irdma_setup_pbles(iwdev->rf, iwmr, use_pbles); if (err) @@ -2380,6 +2378,7 @@ static int irdma_handle_q_mem(struct irdma_device *iwdev, switch (iwmr->type) { case IRDMA_MEMREG_TYPE_QP: + total = req->sq_pages + req->rq_pages; hmc_p = &qpmr->sq_pbl; qpmr->shadow = (dma_addr_t)arr[total]; @@ -2406,7 +2405,7 @@ static int irdma_handle_q_mem(struct irdma_device *iwdev, hmc_p = &cqmr->cq_pbl; if (!cqmr->split) - cqmr->shadow = (dma_addr_t)arr[total]; + cqmr->shadow = (dma_addr_t)arr[req->cq_pages]; if (use_pbles) ret = irdma_check_mem_contiguous(arr, req->cq_pages, @@ -2747,7 +2746,8 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len, struct irdma_mr *iwmr; struct ib_umem *region; struct irdma_mem_reg_req req; - u32 stag = 0; + u32 total, stag = 0; + u8 shadow_pgcnt = 1; bool use_pbles = false; unsigned long flags; int err = -EINVAL; @@ -2801,7 +2801,13 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len, switch (req.reg_type) { case IRDMA_MEMREG_TYPE_QP: - use_pbles = ((req.sq_pages + req.rq_pages) > 2); + total = req.sq_pages + req.rq_pages + shadow_pgcnt; + if (total > iwmr->page_cnt) { + err = -EINVAL; + goto error; + } + total = req.sq_pages + req.rq_pages; + use_pbles = (total > 2); err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles); if (err) goto error; @@ -2814,6 +2820,14 @@ static struct ib_mr *irdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 len, spin_unlock_irqrestore(&ucontext->qp_reg_mem_list_lock, flags); break; case IRDMA_MEMREG_TYPE_CQ: + if (iwdev->rf->sc_dev.hw_attrs.uk_attrs.feature_flags & IRDMA_FEATURE_CQ_RESIZE) + shadow_pgcnt = 0; + total = req.cq_pages + shadow_pgcnt; + if (total > iwmr->page_cnt) { + err = -EINVAL; + goto error; + } + use_pbles = (req.cq_pages > 1); err = irdma_handle_q_mem(iwdev, &req, iwpbl, use_pbles); if (err) |