[Qemu-block] [PATCH] block/qcow.c: Fix memory leak in qcow_create()

[Peter Maydell]

Coverity points out that the code path in qcow_create() for
the magic "fat:" backing file name leaks the memory used to
store the filename (CID 1307771). Free the memory before
we overwrite the pointer.

Signed-off-by: Peter Maydell <address@hidden>
---
 block/qcow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/qcow.c b/block/qcow.c
index 95ab123..7bd94dc 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -852,6 +852,7 @@ static int qcow_create(const char *filename, QemuOpts 
*opts, Error **errp)
             header_size += backing_filename_len;
         } else {
             /* special backing file for vvfat */
+            g_free(backing_file);
             backing_file = NULL;
         }
         header.cluster_bits = 9; /* 512 byte cluster to avoid copying
-- 
2.7.4