Fix potential memory corruption and panic in loopback for IB_WR_SEND
variants.
The code blindly assumes the posted length will fit in the fetched rwqe,
which is not a valid assumption.
Fix by adding a limit test, and triggering the appropriate send completion
and putting the QP in an error state. This mimics the handling for
non-loopback QPs.
Fixes: 15703461533a ("IB/{hfi1, qib, rdmavt}: Move ruc_loopback to rdmavt")
Cc: <stable@vger.kernel.org> #v4.20+
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
goto op_err;
if (!ret)
goto rnr_nak;
+ if (wqe->length > qp->r_len)
+ goto inv_err;
break;
case IB_WR_RDMA_WRITE_WITH_IMM:
goto err;
inv_err:
- send_status = IB_WC_REM_INV_REQ_ERR;
+ send_status =
+ sqp->ibqp.qp_type == IB_QPT_RC ?
+ IB_WC_REM_INV_REQ_ERR :
+ IB_WC_SUCCESS;
wc.status = IB_WC_LOC_QP_OP_ERR;
goto err;