netdev - Re: NULL pointer dereference in libbpf

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Message-ID: <ca30a5d9-3ea7-ca1a-3cb6-bc01fbdb4805@kot-begemot.co.uk>
Date:   Fri, 18 Jun 2021 10:54:30 +0100
From:   Anton Ivanov <anton.ivanov@...-begemot.co.uk>
To:     Toke Høiland-Jørgensen <toke@...hat.com>,
        netdev@...r.kernel.org
Subject: Re: NULL pointer dereference in libbpf



On 18/06/2021 10:24, Toke Høiland-Jørgensen wrote:
> Anton Ivanov <anton.ivanov@...-begemot.co.uk> writes:
> 
>> https://elixir.bootlin.com/linux/latest/source/tools/lib/bpf/bpf.c#L91
>>
>> A string is copied to a pointer destination which has been memset to
>> zero a few lines above.
> 
> No, it isn't. attr.map_name is an array...

Apologies, looking at the wrong struct definition (bpf_create_map_attr instead of bpf_attr).

Best Regards,

> 
> -Toke
> 
> 

-- 
Anton R. Ivanov
https://www.kot-begemot.co.uk/