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| author |   Bob Pearson <rpearsonhpe@gmail.com> | 2021-03-04 13:20:49 -0600 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2021-03-05 14:11:02 -0400 |
| commit | 21e27ac82db637d2f48f07b3777aae8e7ca52613 (patch) | |
| tree | 53d5d0867dd0f9e091f02c978498fea93bae634f | |
| parent | RDMA/uverbs: Fix kernel-doc warning of _uverbs_alloc (diff) | |
| download | linux-dev-21e27ac82db637d2f48f07b3777aae8e7ca52613.tar.xz linux-dev-21e27ac82db637d2f48f07b3777aae8e7ca52613.zip | |
RDMA/rxe: Fix missed IB reference counting in loopback
When the noted patch below extending the reference taken by
rxe_get_dev_from_net() in rxe_udp_encap_recv() until each skb is freed it
was not matched by a reference in the loopback path resulting in
underflows.
Fixes: 899aba891cab ("RDMA/rxe: Fix FIXME in rxe_udp_encap_recv()")
Link: https://lore.kernel.org/r/20210304192048.2958-1-rpearson@hpe.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_net.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c index 0701bd1ffd1a..01662727dca0 100644 --- a/drivers/infiniband/sw/rxe/rxe_net.c +++ b/drivers/infiniband/sw/rxe/rxe_net.c @@ -407,14 +407,22 @@ int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb) return 0; } +/* fix up a send packet to match the packets + * received from UDP before looping them back + */ void rxe_loopback(struct sk_buff *skb) { + struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); + if (skb->protocol == htons(ETH_P_IP)) skb_pull(skb, sizeof(struct iphdr)); else skb_pull(skb, sizeof(struct ipv6hdr)); - rxe_rcv(skb); + if (WARN_ON(!ib_device_try_get(&pkt->rxe->ib_dev))) + kfree_skb(skb); + else + rxe_rcv(skb); } struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, |