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Date: Tue, 5 Apr 2011 15:04:14 +0200 From: kaber@...sh.net To: davem@...emloft.net Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH 3/8] netfilter: h323: bug in parsing of ASN1 SEQOF field From: David Sterba <dsterba@...e.cz> Static analyzer of clang found a dead store which appears to be a bug in reading count of items in SEQOF field, only the lower byte of word is stored. This may lead to corrupted read and communication shutdown. The bug has been in the module since it's first inclusion into linux kernel. [Patrick: the bug is real, but without practical consequence since the largest amount of sequence-of members we parse is 30.] Signed-off-by: David Sterba <dsterba@...e.cz> Signed-off-by: Patrick McHardy <kaber@...sh.net> --- net/netfilter/nf_conntrack_h323_asn1.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/net/netfilter/nf_conntrack_h323_asn1.c b/net/netfilter/nf_conntrack_h323_asn1.c index 8678823..bcd5ed6 100644 --- a/net/netfilter/nf_conntrack_h323_asn1.c +++ b/net/netfilter/nf_conntrack_h323_asn1.c @@ -631,7 +631,7 @@ static int decode_seqof(bitstr_t *bs, const struct field_t *f, CHECK_BOUND(bs, 2); count = *bs->cur++; count <<= 8; - count = *bs->cur++; + count += *bs->cur++; break; case SEMI: BYTE_ALIGN(bs); -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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