Re: [PATCH 2/2] symbolic-ref: check format of given refname

> Currently, it's possible to update HEAD with a nonsense reference since
> no strict validation ist performed. Example:
>
> 	$ git symbolic-ref HEAD 'refs/heads/master
>      >
>      >
>      > '
>
> Fix this by checking the given reference with check_refname_format().
>
> Signed-off-by: Michael Schubert <mschub@elegosoft.com>
> ---
>   builtin/symbolic-ref.c  |  4 +++-
>   t/t1401-symbolic-ref.sh | 10 ++++++++++
>   2 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/builtin/symbolic-ref.c b/builtin/symbolic-ref.c
> index 801d62e..a529541 100644
> --- a/builtin/symbolic-ref.c
> +++ b/builtin/symbolic-ref.c
> @@ -44,13 +44,15 @@ int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
>   	git_config(git_default_config, NULL);
>   	argc = parse_options(argc, argv, prefix, options,
>   			     git_symbolic_ref_usage, 0);
> -	if (msg &&!*msg)
> +	if (msg && !*msg)
>   		die("Refusing to perform update with empty message");
>   	switch (argc) {
>   	case 1:
>   		check_symref(argv[0], quiet);
>   		break;
>   	case 2:
> +		if (check_refname_format(argv[1], 0))
> +			die("No valid reference format: '%s'", argv[1]);