This is a note to let you know that I've just added the patch titled
vxlan: fix a use after free in vxlan_encap_bypass
to the 3.14-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:
vxlan-fix-a-use-after-free-in-vxlan_encap_bypass.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From foo@baz Fri Nov 7 11:37:05 PST 2014
From: Li RongQing <[email protected]>
Date: Thu, 16 Oct 2014 08:49:41 +0800
Subject: vxlan: fix a use after free in vxlan_encap_bypass
From: Li RongQing <[email protected]>
[ Upstream commit ce6502a8f9572179f044a4d62667c4645256d6e4 ]
when netif_rx() is done, the netif_rx handled skb maybe be freed,
and should not be used.
Signed-off-by: Li RongQing <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/vxlan.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1770,6 +1770,8 @@ static void vxlan_encap_bypass(struct sk
struct pcpu_sw_netstats *tx_stats, *rx_stats;
union vxlan_addr loopback;
union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
+ struct net_device *dev = skb->dev;
+ int len = skb->len;
tx_stats = this_cpu_ptr(src_vxlan->dev->tstats);
rx_stats = this_cpu_ptr(dst_vxlan->dev->tstats);
@@ -1793,16 +1795,16 @@ static void vxlan_encap_bypass(struct sk
u64_stats_update_begin(&tx_stats->syncp);
tx_stats->tx_packets++;
- tx_stats->tx_bytes += skb->len;
+ tx_stats->tx_bytes += len;
u64_stats_update_end(&tx_stats->syncp);
if (netif_rx(skb) == NET_RX_SUCCESS) {
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->rx_packets++;
- rx_stats->rx_bytes += skb->len;
+ rx_stats->rx_bytes += len;
u64_stats_update_end(&rx_stats->syncp);
} else {
- skb->dev->stats.rx_dropped++;
+ dev->stats.rx_dropped++;
}
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/vxlan-fix-a-use-after-free-in-vxlan_encap_bypass.patch
queue-3.14/vxlan-using-pskb_may_pull-as-early-as-possible.patch
queue-3.14/vxlan-fix-a-free-after-use.patch
queue-3.14/ipv4-fix-a-potential-use-after-free-in-ip_tunnel_core.c.patch
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