diff options
| author | Dean Luick <dean.luick@intel.com> | 2016-07-28 15:21:15 -0400 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2016-08-02 22:46:21 -0400 |
| commit | 9ff73c8715dbd02d18b4d99c815f388413314229 (patch) | |
| tree | db60d149c14033aca096e17fe0bd49a96c78315f /drivers/infiniband/hw/hfi1/user_sdma.c | |
| parent | 4fa0d22c9a08f32df4d2f7683b1efe21d1a905ac (diff) | |
IB/hfi1: Validate SDMA user iovector count
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/user_sdma.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/user_sdma.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/hfi1/user_sdma.c b/drivers/infiniband/hw/hfi1/user_sdma.c index 0a0281ae35f1..42cc371cdf95 100644 --- a/drivers/infiniband/hw/hfi1/user_sdma.c +++ b/drivers/infiniband/hw/hfi1/user_sdma.c @@ -560,6 +560,18 @@ int hfi1_user_sdma_process_request(struct file *fp, struct iovec *iovec, return -EINVAL; } + /* + * Sanity check the header io vector count. Need at least 1 vector + * (header) and cannot be larger than the actual io vector count. + */ + if (req_iovcnt(info.ctrl) < 1 || req_iovcnt(info.ctrl) > dim) { + hfi1_cdbg(SDMA, + "[%u:%u:%u:%u] Invalid iov count %d, dim %ld", + dd->unit, uctxt->ctxt, fd->subctxt, info.comp_idx, + req_iovcnt(info.ctrl), dim); + return -EINVAL; + } + if (cq->comps[info.comp_idx].status == QUEUED || test_bit(SDMA_REQ_IN_USE, &pq->reqs[info.comp_idx].flags)) { hfi1_cdbg(SDMA, "[%u:%u:%u] Entry %u is in QUEUED state", @@ -583,7 +595,7 @@ int hfi1_user_sdma_process_request(struct file *fp, struct iovec *iovec, memset(req, 0, sizeof(*req)); /* Mark the request as IN_USE before we start filling it in. */ set_bit(SDMA_REQ_IN_USE, &req->flags); - req->data_iovs = req_iovcnt(info.ctrl) - 1; + req->data_iovs = req_iovcnt(info.ctrl) - 1; /* subtract header vector */ req->pq = pq; req->cq = cq; req->status = -1; @@ -591,8 +603,16 @@ int hfi1_user_sdma_process_request(struct file *fp, struct iovec *iovec, memcpy(&req->info, &info, sizeof(info)); - if (req_opcode(info.ctrl) == EXPECTED) + if (req_opcode(info.ctrl) == EXPECTED) { + /* expected must have a TID info and at least one data vector */ + if (req->data_iovs < 2) { + SDMA_DBG(req, + "Not enough vectors for expected request"); + ret = -EINVAL; + goto free_req; + } req->data_iovs--; + } if (!info.npkts || req->data_iovs > MAX_VECTORS_PER_REQ) { SDMA_DBG(req, "Too many vectors (%u/%u)", req->data_iovs, |