diff options
| author | Patrick McHardy <kaber@trash.net> | 2006-02-04 02:13:57 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-02-04 23:51:19 -0800 |
| commit | ad2ad0f96546d6d56b2665bcc863c33ae57c49c4 (patch) | |
| tree | 9c5f6357bd7a0ecb4748acfaf19a04ea3149707b /net/netfilter/nfnetlink_log.c | |
| parent | c2db292438c20c3f13db6e5563e0ce5b449bedac (diff) | |
| download | linux-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/netfilter/nfnetlink_log.c')
| -rw-r--r-- | net/netfilter/nfnetlink_log.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index 50787af86d7dc..3b3c781b40c06 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; |