From b38dfee3d616ffadb58d4215e3ff9d1d7921031e Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Fri, 9 Jun 2006 16:13:01 -0700 Subject: [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 Signed-off-by: David S. Miller --- net/bridge/br_netfilter.c | 14 +++----------- net/ipv6/netfilter/nf_conntrack_reasm.c | 10 +++------- 2 files changed, 6 insertions(+), 18 deletions(-) (limited to 'net') diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 3da9264..3e41f9d 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 3e31903..c32a029 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 -- cgit v1.1