linux-kernel - Re: [RFC][PATCH 5/5] target: check hex2bin result

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Date:	Mon, 19 Sep 2011 07:19:17 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
Cc:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	andy.shevchenko@...il.com, safford@...son.ibm.com,
	target-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 5/5] target: check hex2bin result

On Fri, 2011-09-16 at 13:21 -0700, Nicholas A. Bellinger wrote: 
> On Fri, 2011-09-16 at 23:07 +0900, Tetsuo Handa wrote:
> > Mimi Zohar wrote:
> > > Now that hex2bin does error checking, on error add debugging error msg.
> > 
> > We are waiting for response from Nicholas, aren't we?
> > Quotuing from http://www.spinics.net/linux/fedora/linux-security-module/msg11570.html :
> > | I was assuming that, by adding error check, hex2bin() will leave the buffer
> > | uninitialized in case of bad input because hex2bin() user in Linux 3.0 can
> > | return errors. Now you are a new user of hex2bin() but your code cannot return
> > | errors. Nicholas, how do you want to handle bad input?
> 
> Hi Folks,
> 
> There is another patch queued for v3.1-final to ensure that non hex
> characters are skipped in target_emulate_evpd_83() when building the NAA
> IEEE Registered Extended designator.
> 
> [PATCH-v2] target: Skip non hex characters for VPD=0x83 NAA IEEE Registered Extended
> http://www.spinics.net/lists/target-devel/msg00607.html

Yes, I see.  Nice to have linux-next back.

> Other than dropping this part from Mimi's patch, the two other warning
> messages on conversion failure are OK in target_core_fabric_lib.c code.
> 
> I'm happy to queue a modified version of this one for v3.2.
> 
> --nab

thanks!

Mimi 

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