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IB/hfi1: Add limit test for RC/UC send via loopback 

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: 1570346153 ("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>
This commit is contained in:
Mike Marciniszyn 2019-01-17 12:42:16 -08:00 committed by Jason Gunthorpe
parent 7709b0dc26
commit 09ce351dff
1 changed files with 6 additions and 1 deletions
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7
drivers/infiniband/sw/rdmavt/qp.c
View File

@ -2910,6 +2910,8 @@ void rvt_ruc_loopback(struct rvt_qp *sqp)
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:
@ -3078,7 +3080,10 @@ void rvt_ruc_loopback(struct rvt_qp *sqp)
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;