From: Peter Schiffer <pschiffe@redhat.com>
Date: Wed, 1 Jun 2016 11:38:36 +0000 (+0200)
Subject: tapestat: avoid double free
X-Git-Tag: v11.3.5~24^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=345b006ac6f27990b2331064fd1c710aa648b06f;p=sysstat

tapestat: avoid double free

Avoid possibility of double free in tape_check_tapes_and_realloc() function.
---

diff --git a/tapestat.c b/tapestat.c
index 7caf4fa..92a6093 100644
--- a/tapestat.c
+++ b/tapestat.c
@@ -210,15 +210,17 @@ void tape_check_tapes_and_realloc(void)
 			if (tape_old_stats_t != NULL) {
 				free(tape_old_stats_t);
 				tape_old_stats_t = NULL;
+			} else {
+				free(tape_old_stats);
+				tape_old_stats = NULL;
 			}
 			if (tape_new_stats_t != NULL) {
 				free(tape_new_stats_t);
 				tape_new_stats_t = NULL;
+			} else {
+				free(tape_new_stats);
+				tape_new_stats = NULL;
 			}
-			free(tape_old_stats);
-			tape_old_stats = NULL;
-			free(tape_new_stats);
-			tape_new_stats = NULL;
 
 			perror("realloc");
 			exit(4);