diff --git a/src/detect-fragoffset.c b/src/detect-fragoffset.c
index ba6d8a38d5..708f830305 100644
--- a/src/detect-fragoffset.c
+++ b/src/detect-fragoffset.c
@@ -179,7 +179,11 @@ DetectFragOffsetData *DetectFragOffsetParse (char *fragoffsetstr) {
         }
     }
 
-    ByteExtractStringUint16(&fragoff->frag_off, 10, 0, substr[1]);
+    if (ByteExtractStringUint16(&fragoff->frag_off, 10, 0, substr[1]) < 0) {
+        SCLogError(SC_ERR_INVALID_ARGUMENT, "specified frag offset %s is not "
+                                        "valid", substr[1]);
+        goto error;
+    }
 
     for (i = 0; i < 3; i++) {
         if (substr[i] != NULL) SCFree(substr[i]);
diff --git a/src/detect-icmp-id.c b/src/detect-icmp-id.c
index 31bb969c3b..5acf544129 100644
--- a/src/detect-icmp-id.c
+++ b/src/detect-icmp-id.c
@@ -185,7 +185,11 @@ DetectIcmpIdData *DetectIcmpIdParse (char *icmpidstr) {
 
     /** \todo can ByteExtractStringUint16 do this? */
     uint16_t id = 0;
-    ByteExtractStringUint16(&id, 10, 0, substr[1]);
+    if (ByteExtractStringUint16(&id, 10, 0, substr[1]) < 0) {
+        SCLogError(SC_ERR_INVALID_ARGUMENT, "specified icmp id %s is not "
+                                        "valid", substr[1]);
+        goto error;
+    }
     iid->id = htons(id);
 
     for (i = 0; i < 3; i++) {
diff --git a/src/detect-icmp-seq.c b/src/detect-icmp-seq.c
index 15a3c30283..9b6a9b0d00 100644
--- a/src/detect-icmp-seq.c
+++ b/src/detect-icmp-seq.c
@@ -185,7 +185,11 @@ DetectIcmpSeqData *DetectIcmpSeqParse (char *icmpseqstr) {
     }
 
     uint16_t seq = 0;
-    ByteExtractStringUint16(&seq, 10, 0, substr[1]);
+    if (ByteExtractStringUint16(&seq, 10, 0, substr[1]) < 0) {
+        SCLogError(SC_ERR_INVALID_ARGUMENT, "specified icmp seq %s is not "
+                                        "valid", substr[1]);
+        goto error;
+    }
     iseq->seq = htons(seq);
 
     for (i = 0; i < 3; i++) {
diff --git a/src/detect-parse.c b/src/detect-parse.c
index e68f0280c2..521590cf85 100644
--- a/src/detect-parse.c
+++ b/src/detect-parse.c
@@ -618,7 +618,8 @@ static int SigParseOptions(DetectEngineCtx *de_ctx, Signature *s, char *optstr)
 
     /* extract the substrings */
     for (i = 1; i <= ret-1; i++) {
-        pcre_get_substring(optstr, ov, MAX_SUBSTRINGS, i, &arr[i-1]);
+        if (pcre_get_substring(optstr, ov, MAX_SUBSTRINGS, i, &arr[i-1]) < 0)
+            goto error;
         //printf("SigParseOptions: arr[%" PRId32 "] = \"%s\"\n", i-1, arr[i-1]);
     }
     arr[i-1]=NULL;
@@ -868,7 +869,9 @@ int SigParseBasics(Signature *s, char *sigstr, char ***result, uint8_t addrs_dir
     }
 
     for (i = 1; i <= ret - 1; i++) {
-        pcre_get_substring(sigstr, ov, MAX_SUBSTRINGS, i, &arr[i - 1]);
+        if (pcre_get_substring(sigstr, ov, MAX_SUBSTRINGS, i, &arr[i - 1]) < 0 ) {
+            goto error;
+        }
         //printf("SigParseBasics: arr[%" PRId32 "] = \"%s\"\n", i-1, arr[i-1]);
     }
     arr[i - 1] = NULL;
diff --git a/src/util-classification-config.c b/src/util-classification-config.c
index 72bcae36f1..67d5db3029 100644
--- a/src/util-classification-config.c
+++ b/src/util-classification-config.c
@@ -140,9 +140,11 @@ int SCClassConfInitContext(DetectEngineCtx *de_ctx)
  */
 static char *SCClassConfGetConfFilename(void)
 {
-    char *log_filename = (char *)default_file_path;
+    char *log_filename = NULL;
 
-    ConfGet("classification-file", &log_filename);
+    if (ConfGet("classification-file", &log_filename) != 1) {
+        log_filename = (char *)default_file_path;
+    }
 
     return log_filename;
 }
diff --git a/src/util-threshold-config.c b/src/util-threshold-config.c
index 19b95ed2f8..ca720ecf23 100644
--- a/src/util-threshold-config.c
+++ b/src/util-threshold-config.c
@@ -68,9 +68,11 @@ static pcre_extra *rate_regex_study = NULL;
  */
 char *SCThresholdConfGetConfFilename(void)
 {
-    char *log_filename = (char *)THRESHOLD_CONF_DEF_CONF_FILEPATH;
+    char *log_filename = NULL;
 
-    ConfGet("threshold-file", &log_filename);
+    if (ConfGet("threshold-file", &log_filename) != 1) {
+        log_filename = (char *)THRESHOLD_CONF_DEF_CONF_FILEPATH;
+    }
 
     return log_filename;
 }