Author: ngie
Date: Sat Dec 10 23:26:34 2016
New Revision: 309839
URL: https://svnweb.freebsd.org/changeset/base/309839
Log:
free/NULL out variables prior to calling strdup to avoid leaking memory
if arguments are specified more than once with "camcontrol timestamp".
CID: 1366829, 1366831
MFC after: 1 week
Modified:
head/sbin/camcontrol/timestamp.c
Modified: head/sbin/camcontrol/timestamp.c
==============================================================================
--- head/sbin/camcontrol/timestamp.c Sat Dec 10 22:31:49 2016
(r309838)
+++ head/sbin/camcontrol/timestamp.c Sat Dec 10 23:26:34 2016
(r309839)
@@ -336,6 +336,11 @@ timestamp(struct cam_device *device, int
int single_arg = 0;
int do_utc = 0;
+#define FREE(x) do { \
+ free(x); \
+ x = NULL; \
+} while(0)
+
while ((c = getopt(argc, argv, combinedopt)) != -1) {
switch (c) {
case 'r': {
@@ -358,6 +363,7 @@ timestamp(struct cam_device *device, int
}
case 'f': {
single_arg++;
+ FREE(format_string);
format_string = strdup(optarg);
if (format_string == NULL) {
warn("Error allocating memory for format "
@@ -369,6 +375,7 @@ timestamp(struct cam_device *device, int
}
case 'm': {
single_arg++;
+ FREE(format_string);
format_string = strdup(MIL);
if (format_string == NULL) {
warn("Error allocating memory");
@@ -382,6 +389,7 @@ timestamp(struct cam_device *device, int
break;
}
case 'T':
+ FREE(timestamp_string);
timestamp_string = strdup(optarg);
if (timestamp_string == NULL) {
warn("Error allocating memory for format "
@@ -395,6 +403,8 @@ timestamp(struct cam_device *device, int
}
}
+#undef FREE
+
if (action == -1) {
warnx("Must specify an action, either -r or -s");
error = 1;
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