diff options
Diffstat (limited to 'util/data/msgparse.c')
| -rw-r--r-- | util/data/msgparse.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/util/data/msgparse.c b/util/data/msgparse.c index fb312370366d..7c32618a3015 100644 --- a/util/data/msgparse.c +++ b/util/data/msgparse.c @@ -55,7 +55,11 @@ smart_compare(sldns_buffer* pkt, uint8_t* dnow, { if(LABEL_IS_PTR(*dnow)) { /* ptr points to a previous dname */ - uint8_t* p = sldns_buffer_at(pkt, PTR_OFFSET(dnow[0], dnow[1])); + uint8_t* p; + if((size_t)PTR_OFFSET(dnow[0], dnow[1]) + >= sldns_buffer_limit(pkt)) + return -1; + p = sldns_buffer_at(pkt, PTR_OFFSET(dnow[0], dnow[1])); if( p == dprfirst || p == dprlast ) return 0; /* prev dname is also a ptr, both ptrs are the same. */ |