If these functions fail, they should not change *fs. Let's use local
variables to fix this.

Signed-off-by: Greg Kurz <groug@kaod.org>
---
 hw/9pfs/9p-local.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
index 55903e5d7745..c2239bfafce4 100644
--- a/hw/9pfs/9p-local.c
+++ b/hw/9pfs/9p-local.c
@@ -356,10 +356,15 @@ static int local_open(FsContext *ctx, V9fsPath *fs_path,
 {
     char *buffer;
     char *path = fs_path->data;
+    int fd;
 
     buffer = rpath(ctx, path);
-    fs->fd = open(buffer, flags | O_NOFOLLOW);
+    fd = open(buffer, flags | O_NOFOLLOW);
     g_free(buffer);
+    if (fd == -1) {
+        return -1;
+    }
+    fs->fd = fd;
     return fs->fd;
 }
 
@@ -368,13 +373,15 @@ static int local_opendir(FsContext *ctx,
 {
     char *buffer;
     char *path = fs_path->data;
+    DIR *stream;
 
     buffer = rpath(ctx, path);
-    fs->dir.stream = opendir(buffer);
+    stream = opendir(buffer);
     g_free(buffer);
-    if (!fs->dir.stream) {
+    if (!stream) {
         return -1;
     }
+    fs->dir.stream = stream;
     return 0;
 }
 

On Mon, Feb 20, 2017 at 03:39:42PM +0100, Greg Kurz wrote:
> If these functions fail, they should not change *fs. Let's use local
> variables to fix this.
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>
> ---
>  hw/9pfs/9p-local.c |   13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>