linux-kernel - Re: [PATCH bpf v2] tools: bpftool: fix infinite loop in map create

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Message-ID: <6f39c306-465b-66ae-44f1-534654bf9579@iogearbox.net>
Date:   Tue, 16 Apr 2019 10:52:38 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Alban Crequy <alban.crequy@...il.com>, ast@...nel.org
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, alban@...volk.io, iago@...volk.io
Subject: Re: [PATCH bpf v2] tools: bpftool: fix infinite loop in map create

On 04/12/2019 02:40 PM, Alban Crequy wrote:
> From: Alban Crequy <alban@...volk.io>
> 
> "bpftool map create" has an infinite loop on "while (argc)". The error
> case is missing.
> 
> 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
> 
> After the patch:
> $ sudo bpftool map create /sys/fs/bpf/dir/foobar hash key 8 value 8 entries 128
> Error: unknown arg hash
> 
> Fixes: 0b592b5a01be ("tools: bpftool: add map create command")
> Signed-off-by: Alban Crequy <alban@...volk.io>

Applied, thanks!