Fix memleaks in dmi.c.

In dmi_init() we populate static char *dmistrings[] with values that get
later compared in dmi_match(). Those strings are actually strduped in
get_dmi_string() and hence need to be freed later. This patch accomplishes
this by registering another shutdown method. Also, the tangling pointers are
nulled when the memories are freed.

This bug was found thanks to valgrind.

Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: https://code.coreboot.org/svn/flashrom/trunk@1604 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 14 insertions, 1 deletions

diff --git a/dmi.c b/dmi.c
index dfc78e9..a6e2146 100644
--- a/dmi.c
+++ b/dmi.c
@@ -144,16 +144,29 @@ static char *get_dmi_string(const char *string_name)
 
 	result = strdup(answerbuf);
 	if (!result)
-		puts("WARNING: Out of memory - DMI support fails");
+		msg_perr("WARNING: Out of memory - DMI support fails");
 
 	return result;
 }
 
+static int dmi_shutdown(void *data)
+{
+	int i;
+	for (i = 0; i < ARRAY_SIZE(dmistrings); i++) {
+		free(dmistrings[i]);
+		dmistrings[i] = NULL;
+	}
+	return 0;
+}
+
 void dmi_init(void)
 {
 	int i;
 	char *chassis_type;
 
+	if (register_shutdown(dmi_shutdown, NULL))
+		return;
+
 	has_dmi_support = 1;
 	for (i = 0; i < ARRAY_SIZE(dmidecode_names); i++) {
 		dmistrings[i] = get_dmi_string(dmidecode_names[i]);