aboutsummaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_conntrack_sip.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 237cc1981b8..cb5a2858178 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1419,6 +1419,7 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff,
const char *dptr, *end;
s16 diff, tdiff = 0;
int ret = NF_ACCEPT;
+ bool term;
typeof(nf_nat_sip_seq_adjust_hook) nf_nat_sip_seq_adjust;
if (ctinfo != IP_CT_ESTABLISHED &&
@@ -1453,14 +1454,21 @@ static int sip_help_tcp(struct sk_buff *skb, unsigned int protoff,
if (dptr + matchoff == end)
break;
- if (end + strlen("\r\n\r\n") > dptr + datalen)
- break;
- if (end[0] != '\r' || end[1] != '\n' ||
- end[2] != '\r' || end[3] != '\n')
+ term = false;
+ for (; end + strlen("\r\n\r\n") <= dptr + datalen; end++) {
+ if (end[0] == '\r' && end[1] == '\n' &&
+ end[2] == '\r' && end[3] == '\n') {
+ term = true;
+ break;
+ }
+ }
+ if (!term)
break;
end += strlen("\r\n\r\n") + clen;
msglen = origlen = end - dptr;
+ if (msglen > datalen)
+ return NF_DROP;
ret = process_sip_msg(skb, ct, dataoff, &dptr, &msglen);
if (ret != NF_ACCEPT)