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authorHerbert Xu <herbert@gondor.apana.org.au>2006-06-09 16:13:01 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-17 21:30:20 -0700
commitb38dfee3d616ffadb58d4215e3ff9d1d7921031e (patch)
tree55ae104c8522e973291f490c9902580de798ae93
parentc8c9f9a3de2c50c876b1068dd41f9a06c5749f80 (diff)
[NET]: skb_trim audit
I found a few more spots where pskb_trim_rcsum could be used but were not. This patch changes them to use it. Also, sk_filter can get paged skb data. Therefore we must use pskb_trim instead of skb_trim. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/sock.h5
-rw-r--r--net/bridge/br_netfilter.c14
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c10
3 files changed, 7 insertions, 22 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 75b0e97ed93..96565ff0de6 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -873,10 +873,7 @@ static inline int sk_filter(struct sock *sk, struct sk_buff *skb, int needlock)
if (filter) {
unsigned int pkt_len = sk_run_filter(skb, filter->insns,
filter->len);
- if (!pkt_len)
- err = -EPERM;
- else
- skb_trim(skb, pkt_len);
+ err = pkt_len ? pskb_trim(skb, pkt_len) : -EPERM;
}
if (needlock)
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index 3da9264449f..3e41f9d6d51 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -407,12 +407,8 @@ static unsigned int br_nf_pre_routing_ipv6(unsigned int hook,
if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
goto inhdr_error;
- if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
- if (__pskb_trim(skb, pkt_len + sizeof(struct ipv6hdr)))
- goto inhdr_error;
- if (skb->ip_summed == CHECKSUM_HW)
- skb->ip_summed = CHECKSUM_NONE;
- }
+ if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
+ goto inhdr_error;
}
if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb))
goto inhdr_error;
@@ -495,11 +491,7 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
if (skb->len < len || len < 4 * iph->ihl)
goto inhdr_error;
- if (skb->len > len) {
- __pskb_trim(skb, len);
- if (skb->ip_summed == CHECKSUM_HW)
- skb->ip_summed = CHECKSUM_NONE;
- }
+ pskb_trim_rcsum(skb, len);
nf_bridge_put(skb->nf_bridge);
if (!nf_bridge_alloc(skb))
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 3e319035f82..c32a029e43f 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -456,13 +456,9 @@ static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
DEBUGP("queue: message is too short.\n");
goto err;
}
- if (end-offset < skb->len) {
- if (pskb_trim(skb, end - offset)) {
- DEBUGP("Can't trim\n");
- goto err;
- }
- if (skb->ip_summed != CHECKSUM_UNNECESSARY)
- skb->ip_summed = CHECKSUM_NONE;
+ if (pskb_trim_rcsum(skb, end - offset)) {
+ DEBUGP("Can't trim\n");
+ goto err;
}
/* Find out which fragments are in front and at the back of us