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| author | Bob Pearson <rpearsonhpe@gmail.com> | 2024-03-29 09:55:12 -0500 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-04-22 16:54:33 -0300 |
| commit | 8776618dbbd1b6f210b31509507e1aad461d6435 (patch) | |
| tree | d9fc6f2496da0f175c8256f4f29c547b56a3bf52 /drivers/infiniband | |
| parent | 23bc06af547f2ca3b7d345e09fd8d04575406274 (diff) | |
| download | linux-stable-8776618dbbd1b6f210b31509507e1aad461d6435.tar.gz linux-stable-8776618dbbd1b6f210b31509507e1aad461d6435.tar.bz2 linux-stable-8776618dbbd1b6f210b31509507e1aad461d6435.zip | |
RDMA/rxe: Fix incorrect rxe_put in error path
In rxe_send() a ref is taken on the qp to keep it alive until the
kfree_skb() has a chance to call the skb destructor rxe_skb_tx_dtor()
which drops the reference. If the packet has an incorrect protocol the
error path just calls kfree_skb() which will call the destructor which
will drop the ref. Currently the driver also calls rxe_put() which is
incorrect. Additionally since the packets sent to rxe_send() are under the
control of the driver and it only ever produces IPV4 or IPV6 packets the
simplest fix is to remove all the code in this block.
Link: https://lore.kernel.org/r/20240329145513.35381-12-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Fixes: 9eb7f8e44d13 ("IB/rxe: Move refcounting earlier in rxe_send()")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_net.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c index a2fc118e7ec1..d81440038f91 100644 --- a/drivers/infiniband/sw/rxe/rxe_net.c +++ b/drivers/infiniband/sw/rxe/rxe_net.c @@ -366,18 +366,10 @@ static int rxe_send(struct sk_buff *skb, struct rxe_pkt_info *pkt) rxe_get(pkt->qp); atomic_inc(&pkt->qp->skb_out); - if (skb->protocol == htons(ETH_P_IP)) { + if (skb->protocol == htons(ETH_P_IP)) err = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); - } else if (skb->protocol == htons(ETH_P_IPV6)) { + else err = ip6_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); - } else { - rxe_dbg_qp(pkt->qp, "Unknown layer 3 protocol: %d\n", - skb->protocol); - atomic_dec(&pkt->qp->skb_out); - rxe_put(pkt->qp); - kfree_skb(skb); - return -EINVAL; - } if (unlikely(net_xmit_eval(err))) { rxe_dbg_qp(pkt->qp, "error sending packet: %d\n", err); |