From adcb4711101dfef89d473f64a913089d303962ae Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Tue, 30 Jan 2007 14:25:24 -0800 Subject: [PATCH] [NETFILTER]: SIP conntrack: fix out of bounds memory access When checking for an @-sign in skp_epaddr_len, make sure not to run over the packet boundaries. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/ip_conntrack_sip.c | 2 +- net/netfilter/nf_conntrack_sip.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv4/netfilter/ip_conntrack_sip.c b/net/ipv4/netfilter/ip_conntrack_sip.c index 571d27e20910..11c588a10e6b 100644 --- a/net/ipv4/netfilter/ip_conntrack_sip.c +++ b/net/ipv4/netfilter/ip_conntrack_sip.c @@ -292,7 +292,7 @@ static int skp_epaddr_len(const char *dptr, const char *limit, int *shift) dptr++; } - if (*dptr == '@') { + if (dptr <= limit && *dptr == '@') { dptr++; (*shift)++; } else diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index c93fb37a54fc..9dec11534678 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -312,7 +312,7 @@ static int skp_epaddr_len(struct nf_conn *ct, const char *dptr, dptr++; } - if (*dptr == '@') { + if (dptr <= limit && *dptr == '@') { dptr++; (*shift)++; } else -- GitLab