[PULL 11/25] Fix double free issue in qemu_set_log_filename().

[Alex Bennée]

From: Robert Foley <robert.fo...@linaro.org>

After freeing the logfilename, we set logfilename to NULL, in case of an
error which returns without setting logfilename.

Signed-off-by: Robert Foley <robert.fo...@linaro.org>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
Message-Id: <20191118211528.3221-2-robert.fo...@linaro.org>

diff --git a/util/log.c b/util/log.c
index 1ca13059eef..4316fe74eee 100644
--- a/util/log.c
+++ b/util/log.c
@@ -113,6 +113,7 @@ void qemu_set_log_filename(const char *filename, Error 
**errp)
 {
     char *pidstr;
     g_free(logfilename);
+    logfilename = NULL;
 
     pidstr = strstr(filename, "%");
     if (pidstr) {
-- 
2.20.1