This is a note to let you know that I've just added the patch titled
RDMA/rxe: Handle skb_clone() failure in rxe_recv.c
to the 5.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-rxe-handle-skb_clone-failure-in-rxe_recv.c.patch
and it can be found in the queue-5.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b56ac3f59e1ee99d6929e96bec07035edc9cf6e5
Author: Bob Pearson <rpearsonhpe@xxxxxxxxx>
Date: Tue Oct 13 13:42:37 2020 -0500
RDMA/rxe: Handle skb_clone() failure in rxe_recv.c
[ Upstream commit 71abf20b28ff87fee6951ec2218d5ce7969c4e87 ]
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: e7ec96fc7932f ("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@xxxxxxx
Signed-off-by: Bob Pearson <rpearson@xxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/sw/rxe/rxe_recv.c b/drivers/infiniband/sw/rxe/rxe_recv.c
index be6416a982c70..9bfb98056fc2a 100644
--- a/drivers/infiniband/sw/rxe/rxe_recv.c
+++ b/drivers/infiniband/sw/rxe/rxe_recv.c
@@ -319,6 +319,9 @@ static void rxe_rcv_mcast_pkt(struct rxe_dev *rxe, struct sk_buff *skb)
else
per_qp_skb = skb;
+ if (unlikely(!per_qp_skb))
+ continue;
+
per_qp_pkt = SKB_TO_PKT(per_qp_skb);
per_qp_pkt->qp = qp;
rxe_add_ref(qp);
