Subject: Re: [PATCH bpf-next 1/3] libbpf: Fix func leak in attach_kprobe

From: Jiri Olsa <[email-masked]>
Date: Thu, 22 Jul 2021 09:15:05 +0200

On Wed, Jul 21, 2021 at 11:58:08PM +0200, Jiri Olsa wrote:
> Adding missing free for func pointer in attach_kprobe function.
> 

and of course..

Fixes: a2488b5f483f ("libbpf: Allow specification of "kprobe/function+offset"")

jirka

> Reported-by: Andrii Nakryiko <[email-masked]>
> Signed-off-by: Jiri Olsa <[email-masked]>
> ---
>  tools/lib/bpf/libbpf.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 4c153c379989..d46c2dd37be2 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -10431,6 +10431,7 @@ static struct bpf_link *attach_kprobe(const struct bpf_sec_def *sec,
>  		return libbpf_err_ptr(err);
>  	}
>  	if (opts.retprobe && offset != 0) {
> +		free(func);
>  		err = -EINVAL;
>  		pr_warn("kretprobes do not support offset specification\n");
>  		return libbpf_err_ptr(err);
> -- 
> 2.31.1
>