From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D354E17C9B; Sun, 19 May 2024 08:53:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716108794; cv=none; b=cg5PyLxTF0p9yZQH+f6Q51oOB9PHA4DfKiSOdoROGEMGdf9JfrMhgGx5tJ0kxgnLUA3/BHIQnQLIMEcinwpW6FI2SUAjh33BYH9fy2vlhqCxO7yTSXmVT5Gz+EkoOSSMSeF7dAP8PyFObPbQcP6QzdNGJW+AbxYtAoaQzOwEZpE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716108794; c=relaxed/simple; bh=OkqBkdyMVNgKTLHGmM2W2G4Sl6wOqdQaV04McuATOQo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=gCDBsmvJR7ZVdfO/OyxmHTAJnU1D5BkrcStYzeivnzVjzr0tBc8a+TKAYQCR1wbTTEEPQLm4Yk5BMEbs5qsd+K1ROJMnpt2Dd26NmP4V+dQCo3zQCPMl68heQT0/jHiKI3xJ5ILN7uwmrR69MK7BfqxDqPVWKYwM7lXbnd4lqsk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IBuq5Yc4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IBuq5Yc4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E542EC32781; Sun, 19 May 2024 08:53:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1716108794; bh=OkqBkdyMVNgKTLHGmM2W2G4Sl6wOqdQaV04McuATOQo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=IBuq5Yc42M73fknn1ZCdI+W5JoWxgmzF+MSe29OmTLB31MCmztlXZPuw4nAnyJEr2 wg0lEynF3Zc0qt3J/TJco3+BsIdAryT8wm6d3S3GTXALpjBbiALO4aGt67cpobtXwU MBSoAqf+grgRdP2YgBIrKuapbqB1ADUK/BBpst5U= Date: Sun, 19 May 2024 10:53:11 +0200 From: Greg Kroah-Hartman To: Michal =?iso-8859-1?Q?Koutn=FD?= Cc: cve@kernel.org, linux-kernel@vger.kernel.org, linux-cve-announce@vger.kernel.org Subject: Re: CVE-2024-27406: lib/Kconfig.debug: TEST_IOV_ITER depends on MMU Message-ID: <2024051947-hermit-yeast-3e15@gregkh> References: <2024051739-CVE-2024-27406-cfc3@gregkh> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Fri, May 17, 2024 at 07:42:14PM +0200, Michal Koutný wrote: > On Fri, May 17, 2024 at 01:40:41PM GMT, Greg Kroah-Hartman wrote: > > BUG: failure at mm/nommu.c:318/vmap()! > > Kernel panic - not syncing: BUG! > > > > The test calls vmap() directly, but vmap() is not supported on nommu > > systems, causing the crash. TEST_IOV_ITER therefore needs to depend on > > MMU. > > This is fixing mising assumption of a testing module. > The BUG is deserved AFAIU. The CVE should be reverted IMO. Many people/distros run the built-in unit tests at boot time, and having crashes is not a good idea. So if you don't enable this option, great, this CVE isn't relevent, but if you do, it's an in-kernel crash which is not good, and this is the fix for that. So I don't think this CVE should be rejected, sorry. thanks, greg k-h