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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Todd Kjos <tkjos@google.com>
Cc: devel@driverdev.osuosl.org, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org, arve@android.com, maco@google.com,
	joel@joelfernandes.org, kernel-team@android.com,
	christian@brauner.io
Subject: Re: [PATCH 2/3] binder: read pre-translated fds from sender buffer
Date: Thu, 25 Nov 2021 09:37:38 +0300	[thread overview]
Message-ID: <20211125063738.GK6514@kadam> (raw)
In-Reply-To: <CAHRSSEzj10quNV6mK9QQezPRMyO49xNA14O4wCsx+eY_UkjQWQ@mail.gmail.com>

On Wed, Nov 24, 2021 at 12:33:20PM -0800, Todd Kjos wrote:
> I agree -- if copy_from_user() for some reason doesn't copy the whole
> buffer, it might return a positive integer. Then it would skip
> binder_translate_fd(), but not return. That should probably be
> something like:
> 
>   if (ret)
>     return ret > 0 ? -EINVAL : ret;
> 
> Will fix in next version.

It should really be a separate patch at the start of the series because
it's from the original code and unrelated.

regards,
dan carpenter


  reply	other threads:[~2021-11-25  6:40 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-23 19:17 [PATCH 0/3] binder: Prevent untranslated sender data from being copied to target Todd Kjos
2021-11-23 19:17 ` [PATCH 1/3] binder: avoid potential data leakage when copying txn Todd Kjos
2021-11-24  7:50   ` Martijn Coenen
2021-11-24 13:01   ` Dan Carpenter
2021-11-24 20:11     ` Todd Kjos
2021-11-25  2:05   ` kernel test robot
2021-11-25 12:18   ` kernel test robot
2021-11-23 19:17 ` [PATCH 2/3] binder: read pre-translated fds from sender buffer Todd Kjos
2021-11-24  7:50   ` Martijn Coenen
2021-11-24 12:37   ` Dan Carpenter
2021-11-24 20:33     ` Todd Kjos
2021-11-25  6:37       ` Dan Carpenter [this message]
2021-11-23 19:17 ` [PATCH 3/3] binder: defer copies of pre-patched txn data Todd Kjos
2021-11-24  7:50   ` Martijn Coenen
2021-11-24 11:09   ` Dan Carpenter
2021-11-24 20:39     ` Todd Kjos
2021-11-24 12:43   ` Dan Carpenter
2021-11-24 20:37     ` Todd Kjos
2021-11-24  8:08 ` [PATCH 0/3] binder: Prevent untranslated sender data from being copied to target Greg KH
2021-11-24 15:54   ` Todd Kjos

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