From: David Miller <davem@davemloft.net>
To: arnd@arndb.de
Cc: ast@kernel.org, daniel@iogearbox.net, ecree@solarflare.com,
john.fastabend@gmail.com, jakub.kicinski@netronome.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] [net-next] bpf: fix out-of-bounds access warning in bpf_check
Date: Fri, 03 Nov 2017 14:20:47 +0900 (KST) [thread overview]
Message-ID: <20171103.142047.186502648211524647.davem@davemloft.net> (raw)
In-Reply-To: <20171102110558.2746221-2-arnd@arndb.de>
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 2 Nov 2017 12:05:52 +0100
> The bpf_verifer_ops array is generated dynamically and may be
> empty depending on configuration, which then causes an out
> of bounds access:
>
> kernel/bpf/verifier.c: In function 'bpf_check':
> kernel/bpf/verifier.c:4320:29: error: array subscript is above array bounds [-Werror=array-bounds]
>
> This adds a check to the start of the function as a workaround.
> I would assume that the function is never called in that configuration,
> so the warning is probably harmless.
>
> Fixes: 00176a34d9e2 ("bpf: remove the verifier ops from program structure")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Applied.
next prev parent reply other threads:[~2017-11-03 5:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-02 11:05 [PATCH 1/2] [net-next] bpf: fix link error without CONFIG_NET Arnd Bergmann
2017-11-02 11:05 ` [PATCH 2/2] [net-next] bpf: fix out-of-bounds access warning in bpf_check Arnd Bergmann
2017-11-02 15:59 ` Alexei Starovoitov
2017-11-02 16:14 ` Arnd Bergmann
2017-11-02 17:58 ` Jakub Kicinski
2017-11-02 18:47 ` Alexei Starovoitov
2017-11-02 22:35 ` Daniel Borkmann
2017-11-03 5:20 ` David Miller [this message]
2017-11-02 17:55 ` [PATCH 1/2] [net-next] bpf: fix link error without CONFIG_NET Jakub Kicinski
2017-11-02 18:48 ` Alexei Starovoitov
2017-11-02 22:32 ` Daniel Borkmann
2017-11-03 5:20 ` David Miller
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