RDMA/rxe: Handle skb_clone() failure in rxe_recv.c

If skb_clone() is unable to allocate memory for a new sk_buff this is not
detected by the current code.

Check for a NULL return and continue. This is similar to other errors in
this loop over QPs attached to the multicast address and consistent with
the unreliable UD transport.

Fixes: e7ec96fc79 ("RDMA/rxe: Fix skb lifetime in rxe_rcv_mcast_pkt()")
Addresses-Coverity-ID: 1497804: Null pointer dereferences (NULL_RETURNS)
Link: https://lore.kernel.org/r/20201013184236.5231-1-rpearson@hpe.com
Signed-off-by: Bob Pearson <rpearson@hpe.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2020-10-13 13:42:37 -05:00 committed by Jason Gunthorpe
parent e0d696d201
commit 71abf20b28

View File

@ -271,6 +271,9 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
else else
per_qp_skb = skb; per_qp_skb = skb;
if (unlikely(!per_qp_skb))
continue;
per_qp_pkt = SKB_TO_PKT(per_qp_skb); per_qp_pkt = SKB_TO_PKT(per_qp_skb);
per_qp_pkt->qp = qp; per_qp_pkt->qp = qp;
rxe_add_ref(qp); rxe_add_ref(qp);