Re: [PATCH] upload-pack: only accept commits from "shallow" line

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Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> writes:

> We only allow cuts at commits, not arbitrary objects. upload-pack will
> fail eventually in register_shallow if a non-commit is given with a
> generic error "Object %s is a %s, not a commit". Check it early and
> give a more accurate error.
>
> This should never show up in an ordinary session. It's for buggy
> clients, or when the user manually edits .git/shallow.
>
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
> ---

Thanks. I agree with you that while this is not wrong per-se, this
will not matter in real life.

>  upload-pack.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/upload-pack.c b/upload-pack.c
> index 6142421..95d8313 100644
> --- a/upload-pack.c
> +++ b/upload-pack.c
> @@ -603,6 +603,8 @@ static void receive_needs(void)
>  			object = parse_object(sha1);
>  			if (!object)
>  				die("did not find object for %s", line);
> +			if (object->type != OBJ_COMMIT)
> +				die("invalid shallow object %s", sha1_to_hex(sha1));
>  			object->flags |= CLIENT_SHALLOW;
>  			add_object_array(object, NULL, &shallows);
>  			continue;
--
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