linux-kernel - Re: [PATCH] FLAT: fix unmap len in load error path

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Message-ID: <20100528062632.GC20365@mcafee.com>
Date:	Fri, 28 May 2010 16:26:32 +1000
From:	David McCullough <david_mccullough@...fee.com>
To:	Mike Frysinger <vapier@...too.org>
CC:	uclinux-dev@...inux.org, David Howells <dhowells@...hat.com>,
	Greg Ungerer <gerg@...inux.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] FLAT: fix unmap len in load error path


Jivin Mike Frysinger lays it down ...
> The data chunk is mmaped with 'len' which remains unchanged, so use that
> when unmapping in the error path rather than trying to recalculate (and
> incorrectly so) the value used originally.
> 
> Signed-off-by: Mike Frysinger <vapier@...too.org>

Acked-by: David McCullough <david_mccullough@...fee.com>

Cheers,
Davidm

> ---
>  fs/binfmt_flat.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
> index 4959a0a..f7a4059 100644
> --- a/fs/binfmt_flat.c
> +++ b/fs/binfmt_flat.c
> @@ -596,7 +596,7 @@ static int load_flat_file(struct linux_binprm * bprm,
>  		if (IS_ERR_VALUE(result)) {
>  			printk("Unable to read data+bss, errno %d\n", (int)-result);
>  			do_munmap(current->mm, textpos, text_len);
> -			do_munmap(current->mm, realdatastart, data_len + extra);
> +			do_munmap(current->mm, realdatastart, len);
>  			ret = result;
>  			goto err;
>  		}
> -- 
> 1.7.1
> 
> 
> 

-- 
David McCullough,      david_mccullough@...fee.com,  Ph:+61 734352815
McAfee - SnapGear      http://www.mcafee.com         http://www.uCdot.org
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