linux-kernel - Re: drop SECURITY_FILE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <200911191526.15345.sgrubb@redhat.com>
Date:	Thu, 19 Nov 2009 15:26:15 -0500
From:	Steve Grubb <sgrubb@...hat.com>
To:	"Andrew G. Morgan" <morgan@...nel.org>
Cc:	"Serge E. Hallyn" <serue@...ibm.com>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Kees Cook <kees.cook@...onical.com>,
	Andreas Gruenbacher <agruen@...e.de>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	George Wilson <gcwilson@...ibm.com>,
	KaiGai Kohei <kaigai@...gai.gr.jp>
Subject: Re: drop SECURITY_FILE_CAPABILITIES?

On Thursday 19 November 2009 10:35:12 am Andrew G. Morgan wrote:
> How about this change?
> 
> @@ -169,8 +169,11 @@ SYSCALL_DEFINE2(capget, cap_user_header_
>        kernel_cap_t pE, pI, pP;
> 
>        ret = cap_validate_magic(header, &tocopy);
> -       if (ret != 0)
> +       if ((ret != 0) || (dataptr == NULL)) {
> +               if ((ret == -EINVAL) && (dataptr == NULL))
> +                       return 0;
>                return ret;
> +       }
> 
>        if (get_user(pid, &header->pid))
>                return -EFAULT;
> 
> ? This is a slightly modified version of what you posted before.
> Specifically, in the case that the user guessed a compatible version
> this NULL call will succeed and not EFAULT.

Sure. Looks good to me.

Thanks,
-Steve
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/