linux-kernel - Re: [PATCH 2/7] fallocate() implementation in i386, x86

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Date:	Thu, 12 Jul 2007 18:39:10 +0530
From:	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>
To:	David Patrick Quigley <dpquigl@...ho.nsa.gov>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	eparis@...hat.com, jmorris@...ei.org, sds@...ho.nsa.gov
Subject: Re: [PATCH 2/7] fallocate() implementation in i386, x86_64 and powerpc

On Thu, Jul 12, 2007 at 08:56:30AM -0400, David Patrick Quigley wrote:
> From: David P. Quigley <dpquigl@...ho.nsa.gov>
> 
> Revalidate the write permissions for fallocate(2), in case security policy has
> changed since the files were opened.

Thanks for your patch! Will include it in the patchset.

--
Regards,
Amit Arora
> 
> Signed-off-by: David P. Quigley <dpquigl@...ho.nsa.gov>
> 
> fs/open.c |    3 +++
> 1 file changed, 3 insertions(+)
> 
> diff -uprN -X linux-2.6.22/Documentation/dontdiff linux-2.6.22-fallocate/fs/open.c linux-2.6.22-fallocate-selinux/fs/open.c
> --- linux-2.6.22-fallocate/fs/open.c	2007-07-11 15:51:10.000000000 -0400
> +++ linux-2.6.22-fallocate-selinux/fs/open.c	2007-07-11 16:10:43.000000000 -0400
> @@ -411,6 +411,9 @@ asmlinkage long sys_fallocate(int fd, in
>  		goto out;
>  	if (!(file->f_mode & FMODE_WRITE))
>  		goto out_fput;
> +	ret = security_file_permission(file, MAY_WRITE);
> +	if (ret)
> +		goto out_fput;
> 
>  	inode = file->f_path.dentry->d_inode;
-
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