From: walter harms <wharms@bfs.de>
To: kernel-janitors@vger.kernel.org
Subject: Re: [patch v3] [media] av7110: check for negative array offset
Date: Wed, 12 Jan 2011 12:44:48 +0000 [thread overview]
Message-ID: <4D2DA240.7010200@bfs.de> (raw)
In-Reply-To: <20110107194153.GA1959@bicker>
Am 07.01.2011 20:41, schrieb Dan Carpenter:
> info->num comes from the user. It's type int. If the user passes
> in a negative value that would cause memory corruption.
>
> Signed-off-by: Dan Carpenter <error27@gmail.com>
> ---
> V2: change the check instead of making num and unsigned int
> V3: white space changes
>
> diff --git a/drivers/media/dvb/ttpci/av7110_ca.c b/drivers/media/dvb/ttpci/av7110_ca.c
> index 122c728..923a8e2 100644
> --- a/drivers/media/dvb/ttpci/av7110_ca.c
> +++ b/drivers/media/dvb/ttpci/av7110_ca.c
> @@ -277,7 +277,7 @@ static int dvb_ca_ioctl(struct file *file, unsigned int cmd, void *parg)
> {
> ca_slot_info_t *info=(ca_slot_info_t *)parg;
>
> - if (info->num > 1)
> + if (info->num < 0 || info->num > 1)
> return -EINVAL;
maybe i miss the point but anything else than 0 will cause -EINVAL ?
Is that intended ?
re,
wh
> av7110->ci_slot[info->num].num = info->num;
> av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
>
> --
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>
next prev parent reply other threads:[~2011-01-12 12:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-06 19:41 [patch] [media] av7110: make array offset unsigned Dan Carpenter
2011-01-07 12:44 ` Andreas Oberritter
2011-01-07 13:46 ` [patch v2] [media] av7110: check for negative array offset Dan Carpenter
2011-01-07 19:01 ` Oliver Endriss
2011-01-07 19:41 ` [patch v3] " Dan Carpenter
2011-01-12 12:44 ` walter harms [this message]
2011-01-12 13:30 ` Jorge Merlino
2011-01-12 15:49 ` walter harms
2011-01-07 13:51 ` [patch] [media] av7110: make array offset unsigned Dan Carpenter
2011-01-07 14:02 ` Vasiliy Kulikov
2011-01-07 14:05 ` Andreas Oberritter
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