linux-kernel - Re: [PATCH 4.19 134/243] bpf: btf: check name validity for various types

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Date:   Thu, 12 Dec 2019 13:06:24 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.19 134/243] bpf: btf: check name validity for various
 types

On Wed 2019-12-11 16:04:56, Greg Kroah-Hartman wrote:
> From: Yonghong Song <yhs@...com>
> 
> [ Upstream commit eb04bbb608e683f8fd3ef7f716e2fa32dd90861f ]
> 
> This patch added name checking for the following types:
>  . BTF_KIND_PTR, BTF_KIND_ARRAY, BTF_KIND_VOLATILE,
>    BTF_KIND_CONST, BTF_KIND_RESTRICT:
>      the name must be null
>  . BTF_KIND_STRUCT, BTF_KIND_UNION: the struct/member name
>      is either null or a valid identifier
>  . BTF_KIND_ENUM: the enum type name is either null or a valid
>      identifier; the enumerator name must be a valid identifier.
>  . BTF_KIND_FWD: the name must be a valid identifier
>  . BTF_KIND_TYPEDEF: the name must be a valid identifier
> 
> For those places a valid name is required, the name must be
> a valid C identifier. This can be relaxed later if we found
> use cases for a different (non-C) frontend.

Does this fix any serious bug? I don't think this is suitable for
stable.

								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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