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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-26 19:21:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-27 11:37:33 -0700 |
| commit | e5ccd96110d5ac0f73b695ba606feb6d69472f26 (patch) | |
| tree | 6178c6bc06df10664837c9589afdebf6369a9c98 /drivers/net/ehea | |
| parent | b914c4ea929a4ba6fb97967800dc473c31552b98 (diff) | |
| download | lwn-e5ccd96110d5ac0f73b695ba606feb6d69472f26.tar.gz lwn-e5ccd96110d5ac0f73b695ba606feb6d69472f26.zip | |
ehea: fix use after free
ehea_start_xmit() dereferences skb after its freeing in ehea_xmit3() to
get vlan tags.
Move the offending block before the potential ehea_xmit3() call.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ehea')
| -rw-r--r-- | drivers/net/ehea/ehea_main.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c index bb7d306fb446..e59d38629099 100644 --- a/drivers/net/ehea/ehea_main.c +++ b/drivers/net/ehea/ehea_main.c @@ -2249,6 +2249,11 @@ static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) memset(swqe, 0, SWQE_HEADER_SIZE); atomic_dec(&pr->swqe_avail); + if (vlan_tx_tag_present(skb)) { + swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; + swqe->vlan_tag = vlan_tx_tag_get(skb); + } + if (skb->len <= SWQE3_MAX_IMM) { u32 sig_iv = port->sig_comp_iv; u32 swqe_num = pr->swqe_id_counter; @@ -2279,11 +2284,6 @@ static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) } pr->swqe_id_counter += 1; - if (vlan_tx_tag_present(skb)) { - swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; - swqe->vlan_tag = vlan_tx_tag_get(skb); - } - if (netif_msg_tx_queued(port)) { ehea_info("post swqe on QP %d", pr->qp->init_attr.qp_nr); ehea_dump(swqe, 512, "swqe"); |