[PATCH] target/i386: Fix memory leak in sev_read_file_base64()

[Peter Maydell <peter.maydell@linaro.org>]

In sev_read_file_base64() we call g_file_get_contents(), which
allocates memory for the file contents.  We then base64-decode the
contents (which allocates another buffer for the decoded data), but
forgot to free the memory for the original file data.

Use g_autofree to ensure that the file data is freed.

Fixes: Coverity CID 1459997
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
Tested with 'make/make check' only...

 target/i386/sev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/sev.c b/target/i386/sev.c
index 83df8c09f6a..1e7833da1ab 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -565,7 +565,7 @@ static int
 sev_read_file_base64(const char *filename, guchar **data, gsize *len)
 {
     gsize sz;
-    gchar *base64;
+    g_autofree gchar *base64 = NULL;
     GError *error = NULL;
 
     if (!g_file_get_contents(filename, &base64, &sz, &error)) {
-- 
2.20.1