From: Alberto Garcia <be...@igalia.com>
When a block device is opened with BDRV_O_SNAPSHOT and the
bdrv_append_temp_snapshot() call fails then the error code path tries
to unref the already destroyed 'options' QDict.
This can be reproduced easily by setting TMPDIR to a location where
the QEMU process can't write:
$ TMPDIR=/nonexistent $QEMU -drive driver=null-co,snapshot=on
Signed-off-by: Alberto Garcia <be...@igalia.com>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block.c b/block.c
index 0dbb1fcc7b..a381c8ece8 100644
--- a/block.c
+++ b/block.c
@@ -2792,6 +2792,7 @@ static BlockDriverState *bdrv_open_inherit(const char
*filename,
bdrv_parent_cb_change_media(bs, true);
qobject_unref(options);
+ options = NULL;
/* For snapshot=on, create a temporary qcow2 overlay. bs points to the
* temporary snapshot afterwards. */
--
2.17.1
