X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=fs%2Fautofs4%2Fdev-ioctl.c;h=232e03d4780d1b51386e72ab8df7e65af279e8ff;hb=39de65aa2c3eee901db020a4f1396998e09602a3;hp=3182c0e68b4204cb2aec089b5d960b7053534757;hpb=3e09dcd5bde5c1c3bf6aa3f848fe065f0c8fae9c;p=deliverable%2Flinux.git

diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index 3182c0e68b42..232e03d4780d 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -103,6 +103,9 @@ static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *i
 	if (tmp.size < sizeof(tmp))
 		return ERR_PTR(-EINVAL);
 
+	if (tmp.size > (PATH_MAX + sizeof(tmp)))
+		return ERR_PTR(-ENAMETOOLONG);
+
 	return memdup_user(in, tmp.size);
 }