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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2016-08-03 12:41:40 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-08-08 11:58:43 +0200 |
| commit | 0d35d0815b19216f852f257afe420f7c7d182780 (patch) | |
| tree | 99bffa0fa77acfd0a8215617897350a233f7f3a8 /net | |
| parent | c1eda3c6394f805886b2afa8c7ea5e04305ec698 (diff) | |
| download | linux-stable-0d35d0815b19216f852f257afe420f7c7d182780.tar.gz linux-stable-0d35d0815b19216f852f257afe420f7c7d182780.tar.bz2 linux-stable-0d35d0815b19216f852f257afe420f7c7d182780.zip | |
netfilter: nf_conntrack_sip: CSeq 0 is a valid CSeq
Do not drop packet when CSeq is 0 as 0 is also a valid value for CSeq.
simple_strtoul() will return 0 either when all digits are 0
or if there are no digits at all. Therefore when simple_strtoul()
returns 0 we check if first character is digit 0 or not.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_conntrack_sip.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index 8d9db9d4702b..7d77217de6a3 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -1383,7 +1383,7 @@ static int process_sip_response(struct sk_buff *skb, unsigned int protoff, return NF_DROP; } cseq = simple_strtoul(*dptr + matchoff, NULL, 10); - if (!cseq) { + if (!cseq && *(*dptr + matchoff) != '0') { nf_ct_helper_log(skb, ct, "cannot get cseq"); return NF_DROP; } @@ -1446,7 +1446,7 @@ static int process_sip_request(struct sk_buff *skb, unsigned int protoff, return NF_DROP; } cseq = simple_strtoul(*dptr + matchoff, NULL, 10); - if (!cseq) { + if (!cseq && *(*dptr + matchoff) != '0') { nf_ct_helper_log(skb, ct, "cannot get cseq"); return NF_DROP; } |