diff options
| author | Li RongQing <roy.qing.li@gmail.com> | 2014-06-18 13:46:02 +0800 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-07-29 16:56:58 +0200 |
| commit | 50cd0c7603e48063dd2bc0954416889f9431fecf (patch) | |
| tree | fb42bdce01e528fac6a15e7f7ebbd7e605c0e3e2 /net | |
| parent | a6c33e4d990a0bab8f57b0a1ba92430ddc780dff (diff) | |
8021q: fix a potential memory leak
[ Upstream commit 916c1689a09bc1ca81f2d7a34876f8d35aadd11b ]
skb_cow called in vlan_reorder_header does not free the skb when it failed,
and vlan_reorder_header returns NULL to reset original skb when it is called
in vlan_untag, lead to a memory leak.
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'net')
| -rw-r--r-- | net/8021q/vlan_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index 6ee48aac776f..7e57135c7cc4 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -108,8 +108,11 @@ EXPORT_SYMBOL(vlan_dev_vlan_id); static struct sk_buff *vlan_reorder_header(struct sk_buff *skb) { - if (skb_cow(skb, skb_headroom(skb)) < 0) + if (skb_cow(skb, skb_headroom(skb)) < 0) { + kfree_skb(skb); return NULL; + } + memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 2 * ETH_ALEN); skb->mac_header += VLAN_HLEN; return skb; |