fs/9p: re-init the wstat in readdir loop

This ensure that on failure when we free the stat buf we don't end up
freeing an already freed pointer in the earlier loop

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 6580aa4495414bd33a2d260eec8eb95c2bc0a59e..d8a3afe4ff722fcac539863e59a3278d459ec0bd 100644 (file)
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -76,6 +76,15 @@ static inline int dt_type(struct p9_wstat *mistat)
        return rettype;
 }
 
+static void p9stat_init(struct p9_wstat *stbuf)
+{
+       stbuf->name  = NULL;
+       stbuf->uid   = NULL;
+       stbuf->gid   = NULL;
+       stbuf->muid  = NULL;
+       stbuf->extension = NULL;
+}
+
 /**
  * v9fs_dir_readdir - read a directory
  * @filp: opened file structure
@@ -131,8 +140,8 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
                        rdir->head = 0;
                        rdir->tail = err;
                }
-
                while (rdir->head < rdir->tail) {
+                       p9stat_init(&st);
                        err = p9stat_read(rdir->buf + rdir->head,
                                                buflen - rdir->head, &st,
                                                fid->clnt->proto_version);