libfprint/SOURCES/0161-examples-Fix-possible-use-after-free-in-storage-code.patch

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2020-04-23 23:55:43 +00:00
From 8bfb572b5847e271fac49b24c9ceb1a5ea3bdf5d Mon Sep 17 00:00:00 2001
From: Benjamin Berg <bberg@redhat.com>
Date: Thu, 2 Jan 2020 18:38:19 +0100
Subject: [PATCH 161/181] examples: Fix possible use-after-free in storage code
The variant may need the buffer, so we should only free the buffer
together with the variant.
---
examples/storage.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/examples/storage.c b/examples/storage.c
index 6ca6efc..bb69305 100644
--- a/examples/storage.c
+++ b/examples/storage.c
@@ -57,7 +57,7 @@ load_data (void)
{
GVariantDict *res;
GVariant *var;
- g_autofree gchar *contents = NULL;
+ gchar *contents = NULL;
gsize length = 0;
if (!g_file_get_contents (STORAGE_FILE, &contents, &length, NULL))
@@ -66,7 +66,12 @@ load_data (void)
return g_variant_dict_new (NULL);
}
- var = g_variant_new_from_data (G_VARIANT_TYPE_VARDICT, contents, length, FALSE, NULL, NULL);
+ var = g_variant_new_from_data (G_VARIANT_TYPE_VARDICT,
+ contents,
+ length,
+ FALSE,
+ g_free,
+ contents);
res = g_variant_dict_new (var);
g_variant_unref (var);
--
2.24.1