diff options
| author | Raju Rangoju <rajur@chelsio.com> | 2019-01-11 20:27:18 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 14:46:12 +0100 |
| commit | 70da6cce28e018bf19d0ace8d2e34cfbe14fe159 (patch) | |
| tree | f9cee6f8b1e962fc9d7b2d3c7a05fa3b9b0a5c56 /drivers/infiniband | |
| parent | 45ad6d87fd90814aee96d9d6cd2dd76fe0e1d5e5 (diff) | |
RDMA/iw_cxgb4: Fix the unchecked ep dereference
[ Upstream commit 3352976c892301fd576a2e9ff0ac7337b2e2ca48 ]
The patch 944661dd97f4: "RDMA/iw_cxgb4: atomically lookup ep and get a
reference" from May 6, 2016, leads to the following Smatch complaint:
drivers/infiniband/hw/cxgb4/cm.c:2953 terminate()
error: we previously assumed 'ep' could be null (see line 2945)
Fixes: 944661dd97f4 ("RDMA/iw_cxgb4: atomically lookup ep and get a reference")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/cm.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index bb36cdf82a8d..3668cc71b47e 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -2923,15 +2923,18 @@ static int terminate(struct c4iw_dev *dev, struct sk_buff *skb) ep = get_ep_from_tid(dev, tid); BUG_ON(!ep); - if (ep && ep->com.qp) { - pr_warn("TERM received tid %u qpid %u\n", - tid, ep->com.qp->wq.sq.qid); - attrs.next_state = C4IW_QP_STATE_TERMINATE; - c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, - C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); + if (ep) { + if (ep->com.qp) { + pr_warn("TERM received tid %u qpid %u\n", tid, + ep->com.qp->wq.sq.qid); + attrs.next_state = C4IW_QP_STATE_TERMINATE; + c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, + C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); + } + + c4iw_put_ep(&ep->com); } else pr_warn("TERM received tid %u no ep/qp\n", tid); - c4iw_put_ep(&ep->com); return 0; } |