From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarod Wilson Date: Wed, 17 Nov 2010 20:23:58 +0000 Subject: Re: [patch 3/3] [media] lirc_dev: fixes in lirc_dev_fop_read() Message-Id: <20101117202358.GD24814@redhat.com> List-Id: References: <20101117052015.GF31724@bicker> In-Reply-To: <20101117052015.GF31724@bicker> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Dan Carpenter Cc: Mauro Carvalho Chehab , Zimny Lech , linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org On Wed, Nov 17, 2010 at 08:20:15AM +0300, Dan Carpenter wrote: > This makes several changes but they're in one function and sort of > related: > > "buf" was leaked on error. The leak if we try to read an invalid > length is the main concern because it could be triggered over and > over. > > If the copy_to_user() failed, then the original code returned the > number of bytes remaining. read() is supposed to be the opposite way, > where we return the number of bytes copied. I changed it to just return > -EFAULT on errors. > > Also I changed the debug output from "-EFAULT" to just "" because > it isn't -EFAULT necessarily. And since we go though that path if the > length is invalid now, there was another debug print that I removed. > > Signed-off-by: Dan Carpenter Looks good, thanks much. Reviewed-by: Jarod Wilson Acked-by: Jarod Wilson -- Jarod Wilson jarod@redhat.com