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netfilter: nf_ct_h323: Out Of Bound Read in Netfilter Conntrack

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Add missing counter decrement to prevent out of bounds memory read.

Signed-off-by: Eric Sesterhenn <eric.sesterhenn@x41-dsec.de>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Eric Sesterhenn 2017-10-09 07:01:14 +02:00 committed by Pablo Neira Ayuso
parent ce49480dba
commit e8daf27c2f
1 changed files with 1 additions and 0 deletions
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net/netfilter/nf_conntrack_h323_asn1.c
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@ -877,6 +877,7 @@ int DecodeQ931(unsigned char *buf, size_t sz, Q931 *q931)
if (sz < 1)
break;
len = *p++;
sz--;
if (sz < len)
break;
p += len;