linux-kernel - Re: [PATCH bpf-next v1 1/7] tools: bpftool: fix infinite loop

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Date:   Wed, 20 Mar 2019 13:54:09 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Alban Crequy <alban.crequy@...il.com>
Cc:     ast@...nel.org, daniel@...earbox.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, alban@...volk.io, iago@...volk.io
Subject: Re: [PATCH bpf-next v1 1/7] tools: bpftool: fix infinite loop

On Wed, 20 Mar 2019 18:33:26 +0100, Alban Crequy wrote:
> From: Alban Crequy <alban@...volk.io>
> 
> Symptoms: when forgetting to type the keyword 'type' in front of 'hash':
> $ sudo bpftool map create /sys/fs/bpf/dir/foobar hash key 8 value 8 entries 128
> (infinite loop, taking all the CPU)
> ^C
> 

Please add:

Fixes: 0b592b5a01be ("tools: bpftool: add map create command")

here.  And submit this one for the bpf tree.

> Signed-off-by: Alban Crequy <alban@...volk.io>

> diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
> index e0c650d91784..994a7e0d16fb 100644
> --- a/tools/bpf/bpftool/map.c
> +++ b/tools/bpf/bpftool/map.c
> @@ -1151,6 +1151,9 @@ static int do_create(int argc, char **argv)
>  				return -1;
>  			}
>  			NEXT_ARG();
> +		} else {
> +			p_err("unknown arg %s", *argv);
> +			return -1;
>  		}
>  	}
>