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From: Lucas De Marchi <lucas.de.marchi@gmail.com>
To: linux-modules <linux-modules@vger.kernel.org>
Cc: Jorge Lucangeli Obes <jorgelo@google.com>,
	Lucas De Marchi <lucas.demarchi@intel.com>
Subject: Re: [PATCH] libkmod: reset was_space on second pass
Date: Mon, 27 Jan 2020 10:46:02 -0300
Message-ID: <CAKi4VAJjA_G5KZ2Z6uAMKcp-38mF3PfAsfM1MvLQcKuDO7vWsA@mail.gmail.com> (raw)
In-Reply-To: <20200120192210.6370-1-lucas.de.marchi@gmail.com>

On Mon, Jan 20, 2020 at 4:22 PM Lucas De Marchi
<lucas.de.marchi@gmail.com> wrote:
>
> From: Lucas De Marchi <lucas.demarchi@intel.com>
>
> The softdep config parser uses a 2-pass approach to use a single
> allocation for all the softdep struct. However "was_space" variable
> isn't reset between them. This can lead to a buffer overflow.
>
> Reported-by: Jorge Lucangeli Obes <jorgelo@google.com>
> Link: https://lore.kernel.org/linux-modules/CAKYuF5QhGCPCazHQjN-=kFc5kHs7Ok8WqmmGLo31CiOEN8TYdA@mail.gmail.com
> ---

Applied,

Lucas De Marchi

>  libkmod/libkmod-config.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/libkmod/libkmod-config.c b/libkmod/libkmod-config.c
> index aaac0a1..7b62367 100644
> --- a/libkmod/libkmod-config.c
> +++ b/libkmod/libkmod-config.c
> @@ -335,6 +335,7 @@ static int kmod_config_add_softdep(struct kmod_config *config,
>         n_pre = 0;
>         n_post = 0;
>         mode = S_NONE;
> +       was_space = false;
>         for (p = s = line; ; s++) {
>                 size_t plen;
>
> --
> 2.24.1
>


-- 
Lucas De Marchi

  reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20 19:22 Lucas De Marchi
2020-01-27 13:46 ` Lucas De Marchi [this message]
2020-01-28 15:03   ` Jorge Lucangeli Obes

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