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From: Steve French <smfrench-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: "J. R. Okajima" <hooanon05-/E1597aS9LR3+QwDJ9on6Q@public.gmane.org>
Cc: linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	kirk w <kirkpuppy-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>
Subject: Re: Q: cifs, freeing volume_info->UNCip
Date: Thu, 18 Aug 2011 11:55:22 -0500	[thread overview]
Message-ID: <CAH2r5mvA3i8E-KAuQ=+10gfzF1q8dWwB2KQiY3W1FBw_gscurQ@mail.gmail.com> (raw)
In-Reply-To: <7087.1313450537@jrobl>

merged

On Mon, Aug 15, 2011 at 6:22 PM, J. R. Okajima <hooanon05-/E1597aS9LR3+QwDJ9on6Q@public.gmane.org> wrote:
>
> Hello,
>
> CIFS cleanup_volume_info_contents() looks like having a memory
> corruption problem.
> When UNCip is set to "&vol->UNC[2]" in cifs_parse_mount_options(), it
> should not be kfree()-ed in cleanup_volume_info_contents().
>
> If it is correct and the code in mainline is not fixed yet, then here is
> a patch.
>
> diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
> index ccc1afa..e0ea721 100644
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -2838,7 +2838,8 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
>        kfree(volume_info->username);
>        kzfree(volume_info->password);
>        kfree(volume_info->UNC);
> -       kfree(volume_info->UNCip);
> +       if (volume_info->UNCip != volume_info->UNC + 2)
> +               kfree(volume_info->UNCip);
>        kfree(volume_info->domainname);
>        kfree(volume_info->iocharset);
>        kfree(volume_info->prepath);
>
>
> J. R. Okajima
>



-- 
Thanks,

Steve

WARNING: multiple messages have this Message-ID (diff)
From: Steve French <smfrench@gmail.com>
To: "J. R. Okajima" <hooanon05@yahoo.co.jp>
Cc: linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org,
	kirk w <kirkpuppy@yahoo.com>
Subject: Re: Q: cifs, freeing volume_info->UNCip
Date: Thu, 18 Aug 2011 11:55:22 -0500	[thread overview]
Message-ID: <CAH2r5mvA3i8E-KAuQ=+10gfzF1q8dWwB2KQiY3W1FBw_gscurQ@mail.gmail.com> (raw)
In-Reply-To: <7087.1313450537@jrobl>

merged

On Mon, Aug 15, 2011 at 6:22 PM, J. R. Okajima <hooanon05@yahoo.co.jp> wrote:
>
> Hello,
>
> CIFS cleanup_volume_info_contents() looks like having a memory
> corruption problem.
> When UNCip is set to "&vol->UNC[2]" in cifs_parse_mount_options(), it
> should not be kfree()-ed in cleanup_volume_info_contents().
>
> If it is correct and the code in mainline is not fixed yet, then here is
> a patch.
>
> diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
> index ccc1afa..e0ea721 100644
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -2838,7 +2838,8 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
>        kfree(volume_info->username);
>        kzfree(volume_info->password);
>        kfree(volume_info->UNC);
> -       kfree(volume_info->UNCip);
> +       if (volume_info->UNCip != volume_info->UNC + 2)
> +               kfree(volume_info->UNCip);
>        kfree(volume_info->domainname);
>        kfree(volume_info->iocharset);
>        kfree(volume_info->prepath);
>
>
> J. R. Okajima
>



-- 
Thanks,

Steve

  parent reply	other threads:[~2011-08-18 16:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-15 23:22 Q: cifs, freeing volume_info->UNCip J. R. Okajima
2011-08-18  1:29 ` Jeff Layton
2011-08-18  1:29   ` Jeff Layton
2011-08-18 10:42 ` Jeff Layton
2011-08-18 10:42   ` Jeff Layton
2011-08-18 16:55 ` Steve French [this message]
2011-08-18 16:55   ` Steve French

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