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bubblewrap/SOURCES/0001-Avoid-memory-leak-if-a...

40 lines
1.6 KiB

From d70c640aecc30e9216dc1a614a207e85c8732036 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Thu, 27 May 2021 16:19:27 -0400
Subject: [PATCH] Avoid memory leak if --args is specified multiple times
Found by a static analyzer.
```
bubblewrap-0.4.1/bubblewrap.c:1500: overwrite_var: Overwriting "opt_args_data" in "opt_args_data = load_file_data(the_fd, &data_len)" leaks the storage that "opt_args_data" points to.
# 1498| * keep allocated until exit time, since its argv entries get used
# 1499| * by the other cases in parse_args_recurse() when we recurse. */
# 1500|-> opt_args_data = load_file_data (the_fd, &data_len);
# 1501| if (opt_args_data == NULL)
# 1502| die_with_error ("Can't read --args data");
```
---
bubblewrap.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/bubblewrap.c b/bubblewrap.c
index 771e1ea..56ac07c 100644
--- a/bubblewrap.c
+++ b/bubblewrap.c
@@ -1494,6 +1494,12 @@ parse_args_recurse (int *argcp,
if (argv[1][0] == 0 || endptr[0] != 0 || the_fd < 0)
die ("Invalid fd: %s", argv[1]);
+ /* Specifying --args multiple times doesn't work; this just pacifies
+ * a static analyzer which pointed out the memory leak
+ */
+ if (opt_args_data != NULL)
+ free (opt_args_data);
+
/* opt_args_data is essentially a recursive argv array, which we must
* keep allocated until exit time, since its argv entries get used
* by the other cases in parse_args_recurse() when we recurse. */
--
2.31.1