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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-26 23:21:07 +0400
committerDavid S. Miller <davem@davemloft.net>2010-10-27 22:37:33 +0400
commite5ccd96110d5ac0f73b695ba606feb6d69472f26 (patch)
tree6178c6bc06df10664837c9589afdebf6369a9c98 /drivers/net/ehea
parentb914c4ea929a4ba6fb97967800dc473c31552b98 (diff)
downloadlinux-e5ccd96110d5ac0f73b695ba606feb6d69472f26.tar.xz
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.c10
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");