ovl: fix creds leak in copy up error path

Fixes: 42f269b92540 ("ovl: rearrange code in ovl_copy_up_locked()")
Cc: <stable@vger.kernel.org> # v4.11
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 9008ab9..061a844 100644 (file)
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -343,12 +343,13 @@ static int ovl_copy_up_locked(struct dentry *workdir, struct dentry *upperdir,
                temp = ovl_do_tmpfile(upperdir, stat->mode);
        else
                temp = ovl_lookup_temp(workdir, dentry);
-       err = PTR_ERR(temp);
-       if (IS_ERR(temp))
-               goto out1;
-
        err = 0;
-       if (!tmpfile)
+       if (IS_ERR(temp)) {
+               err = PTR_ERR(temp);
+               temp = NULL;
+       }
+
+       if (!err && !tmpfile)
                err = ovl_create_real(wdir, temp, &cattr, NULL, true);
 
        if (new_creds) {