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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/netfilter
parentc2db292438c20c3f13db6e5563e0ce5b449bedac (diff)
downloadlinux-ad2ad0f96546d6d56b2665bcc863c33ae57c49c4.tar.bz2
[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/netfilter')
-rw-r--r--net/netfilter/nfnetlink_log.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 50787af86d7d..3b3c781b40c0 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -314,24 +314,28 @@ static struct sk_buff *nfulnl_alloc_skb(unsigned int inst_size,
unsigned int pkt_size)
{
struct sk_buff *skb;
+ unsigned int n;
UDEBUG("entered (%u, %u)\n", inst_size, pkt_size);
/* alloc skb which should be big enough for a whole multipart
* message. WARNING: has to be <= 128k due to slab restrictions */
- skb = alloc_skb(inst_size, GFP_ATOMIC);
+ n = max(inst_size, pkt_size);
+ skb = alloc_skb(n, GFP_ATOMIC);
if (!skb) {
PRINTR("nfnetlink_log: can't alloc whole buffer (%u bytes)\n",
inst_size);
- /* try to allocate only as much as we need for current
- * packet */
+ if (n > pkt_size) {
+ /* try to allocate only as much as we need for current
+ * packet */
- skb = alloc_skb(pkt_size, GFP_ATOMIC);
- if (!skb)
- PRINTR("nfnetlink_log: can't even alloc %u bytes\n",
- pkt_size);
+ skb = alloc_skb(pkt_size, GFP_ATOMIC);
+ if (!skb)
+ PRINTR("nfnetlink_log: can't even alloc %u "
+ "bytes\n", pkt_size);
+ }
}
return skb;