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authorPatrick McHardy <kaber@trash.net>2006-02-04 02:13:57 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-02-04 23:51:19 -0800
commitad2ad0f96546d6d56b2665bcc863c33ae57c49c4 (patch)
tree9c5f6357bd7a0ecb4748acfaf19a04ea3149707b /net/ipv4/netfilter/ipt_ULOG.c
parentc2db292438c20c3f13db6e5563e0ce5b449bedac (diff)
downloadlinux-stericsson-ad2ad0f96546d6d56b2665bcc863c33ae57c49c4.tar.gz
[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>
Diffstat (limited to 'net/ipv4/netfilter/ipt_ULOG.c')
-rw-r--r--net/ipv4/netfilter/ipt_ULOG.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c
index 2fe64133bba3..180a9ea57b69 100644
--- a/net/ipv4/netfilter/ipt_ULOG.c
+++ b/net/ipv4/netfilter/ipt_ULOG.c
@@ -147,22 +147,26 @@ static void ulog_timer(unsigned long data)
static struct sk_buff *ulog_alloc_skb(unsigned int size)
{
struct sk_buff *skb;
+ unsigned int n;
/* alloc skb which should be big enough for a whole
* multipart message. WARNING: has to be <= 131000
* due to slab allocator restrictions */
- skb = alloc_skb(nlbufsiz, GFP_ATOMIC);
+ n = max(size, nlbufsiz);
+ skb = alloc_skb(n, GFP_ATOMIC);
if (!skb) {
- PRINTR("ipt_ULOG: can't alloc whole buffer %ub!\n",
- nlbufsiz);
+ PRINTR("ipt_ULOG: can't alloc whole buffer %ub!\n", n);
- /* try to allocate only as much as we need for
- * current packet */
+ if (n > size) {
+ /* try to allocate only as much as we need for
+ * current packet */
- skb = alloc_skb(size, GFP_ATOMIC);
- if (!skb)
- PRINTR("ipt_ULOG: can't even allocate %ub\n", size);
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb)
+ PRINTR("ipt_ULOG: can't even allocate %ub\n",
+ size);
+ }
}
return skb;