[NETFILTER]: Fix undersized skb allocation in ipt_ULOG/ebt_ulog/nfnetlink_log
The skb allocated is always of size nlbufsize, even if that is smaller than
the size needed for the current packet.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index dbbf9f6..802baf7 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -98,12 +98,14 @@
static struct sk_buff *ulog_alloc_skb(unsigned int size)
{
struct sk_buff *skb;
+ unsigned int n;
- skb = alloc_skb(nlbufsiz, GFP_ATOMIC);
+ n = max(size, nlbufsiz);
+ skb = alloc_skb(n, GFP_ATOMIC);
if (!skb) {
PRINTR(KERN_ERR "ebt_ulog: can't alloc whole buffer "
- "of size %ub!\n", nlbufsiz);
- if (size < nlbufsiz) {
+ "of size %ub!\n", n);
+ if (n > size) {
/* try to allocate only as much as we need for
* current packet */
skb = alloc_skb(size, GFP_ATOMIC);