[src/trunk]: src/usr.sbin/services_mkdb Avoid memory leak on empty lines (htt...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9dde456c5c07
branches:  trunk
changeset: 981829:9dde456c5c07
user:      christos <christos%NetBSD.org@localhost>
date:      Mon Mar 22 03:28:55 2021 +0000

description:
Avoid memory leak on empty lines (https://reviews.freebsd.org/D29370)

diffstat:

 usr.sbin/services_mkdb/uniq.c |  14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diffs (45 lines):

diff -r 2214c73e7107 -r 9dde456c5c07 usr.sbin/services_mkdb/uniq.c
--- a/usr.sbin/services_mkdb/uniq.c     Mon Mar 22 01:36:10 2021 +0000
+++ b/usr.sbin/services_mkdb/uniq.c     Mon Mar 22 03:28:55 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uniq.c,v 1.6 2014/06/21 17:48:07 christos Exp $        */
+/*     $NetBSD: uniq.c,v 1.7 2021/03/22 03:28:55 christos Exp $        */
 
 /*-
  * Copyright (c) 2007 The NetBSD Foundation, Inc.
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: uniq.c,v 1.6 2014/06/21 17:48:07 christos Exp $");
+__RCSID("$NetBSD: uniq.c,v 1.7 2021/03/22 03:28:55 christos Exp $");
 
 #include <stdio.h>
 #include <string.h>
@@ -126,11 +126,12 @@
        for (p = (const unsigned char *)origline; l && *p && isspace(*p);
            p++, l--)
                continue;
+       if (*p == '\0' || l == 0)
+               return 0;
+
        cline = emalloc(l + 1);
        (void)memcpy(cline, p, l);
        cline[l] = '\0';
-       if (*cline == '\0')
-               return 0;
 
        complen = 0;
        hasalnum = 0;
@@ -160,6 +161,11 @@
                --complen;
        }
        *q = '\0';
+       if (!hasalnum) {
+               free(cline);
+               cline = NULL;
+               complen = 0;
+       }
        *compline = cline;
        *len = complen;
        return hasalnum;