File isdn4k-utils-initialize-memory.patch of Package i4l-base

Author: Bernhard M. Wiedemann <bwiedemann suse de>
Date: 2017-11-07

initialize array to avoid undefined memory being used
to decide what gets written to the database output file

https://bugzilla.opensuse.org/show_bug.cgi?id=1066797

Index: isdn4k-utils/isdnlog/tools/zone/mkzonedb.c
===================================================================
--- isdn4k-utils.orig/isdnlog/tools/zone/mkzonedb.c
+++ isdn4k-utils/isdnlog/tools/zone/mkzonedb.c
@@ -100,6 +100,7 @@ static void read_rzfile(char *rf) {
 		fprintf(stderr, "Out of mem\n");
 		exit(EXIT_FAILURE);
 	}
+	memset(numbers, 0, (maxnum+1)*sizeof(int));
 	n=i=keylen=keydigs=0;
 	if (verbose)
 		printf("Reading %s\n", rf);
@@ -139,11 +140,12 @@ static void read_rzfile(char *rf) {
 		if (to > keylen)
 			keylen=to;
 		if(to>maxnum) {
-			maxnum=to;
-			if ((numbers = realloc(numbers,(maxnum+1)*sizeof(int))) == 0) {
+			if ((numbers = realloc(numbers,(to+1)*sizeof(int))) == 0) {
 				fprintf(stderr, "Out of mem\n");
 				exit(EXIT_FAILURE);
 			}
+			memset(numbers+maxnum+1, 0, (to-maxnum)*sizeof(int));
+			maxnum=to;
 		}
 		numbers[to]++;
 		n++;