From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 EE5653976A4; Tue, 8 Sep 2026 09:29:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788859767; cv=none; b=MygOtsZIeSUWQF6Fa7JMbqeWbrCfF2Skz5FE6q3/XCzy7VbQ03M5ExDHLJ/D+uolz3GqpGxmnYSJSaqixm+I6+uG8h06y8TDvXcIlvbvnfXPcda2tO3eh1pbtPRrYNr8KEZMOIhLW10FVSu5yxEKjpncmQfDdjb6CXBZ/XG5HQk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788859767; c=relaxed/simple; bh=8HNlZD5OOlfCDCBlZAW2xYxQOHSMdp4k66DWsewGV94=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=B0mTNDwSJYpwMPIPx0zLXBAxwqm6VN4fqGRzJdENvjWifOXqb5aNuLpMQFiTT/JmWjU/p8MJYnZK5C3c1k5oVBjeU2ZcOFuYtggki3sIIIgkQxlkB5J6Hf8nqimWk5+ZPJtQWeBVDXKGccOQTAmwM6yzcjrBaIiaMfdzzf7ZHy8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gOPRUGZn; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gOPRUGZn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6634B1F00A3A; Tue, 8 Sep 2026 09:29:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788859765; bh=RLTmU7D9Vs9PNyIcNWfktfyTvD6dwfvTPEO7+SNJnX4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=gOPRUGZn9Bly6FkfQSiA/GvEVLzJ9C2QF3nx9tlTtt399Af1tpdSdgxQnyOJDb0IB ejbirfKdG1lswNYDvvqB8fl3vMmvQ88HrOCqEKU07Xwgl+lJw7FBNk5VIBJ6dy0ihE /oGz8BoROlw8J9fG3duISQRiQXdMIWPvhzpYQTcGNPJJXoOr5qYnRbCGaGt/JE488R ShNc0UOLgZ5oKv5tELsk8fEqaI8/qLhyx3dKCVO8WpTuE9JUbupGZkuIFX1w9RiItr 6qHNWcDA+QlU02J6IYBCWIdDvA4Lz6itFTVyQA5Nce7KMg49AFpKqs8H9mtopqav8h M+/U07s2J2LQg== Date: Tue, 8 Sep 2026 12:29:17 +0300 From: Mike Rapoport To: Nathan Chancellor Cc: Dave Hansen , Dave Hansen , linux-tip-commits@vger.kernel.org, Juergen Gross , "Lorenzo Stoakes (ARM)" , syzbot@syzkaller.appspotmail.com, Atish Patra , Nikunj A Dadhania , stable@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra Subject: Re: [tip: x86/urgent] x86/mm/pat: Fix effective RW computation in lookup_address_in_pgd_attr() Message-ID: References: <20260813-cpa-fixes-v2-5-39b4ff90f91d@kernel.org> <178837401172.3717435.314324339347590321.tip-bot2@tip-bot2> <20260905044253.GA3816371@ax162> <20260906181247.GA1148584@ax162> <1987b7d6-7aa3-4bcd-9082-f2cdfde7c1e4@intel.com> <20260907222813.GB1619741@ax162> 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=us-ascii Content-Disposition: inline In-Reply-To: <20260907222813.GB1619741@ax162> Hi Nathan, On Mon, Sep 07, 2026 at 03:28:13PM -0700, Nathan Chancellor wrote: > On Sun, Sep 06, 2026 at 12:12:54PM -0700, Dave Hansen wrote: > > On 9/6/26 11:12, Nathan Chancellor wrote: > > > Hmmm, I don't see a warning prior to this patch though. Do you mean that > > > this patch is just revealing the bad behavior that you mention below? > > > > Yeah, "fixes" was a bad word to use. > > > > The W^X detection has been broken for a while. The patch you bisected to > > fixes the W^X detection. It doesn't actually cause the issue. > > Ah okay, that parses way better. I assume this will be sorted out > without further information needed from me but I am happy to test a > patch when available. Here: https://lore.kernel.org/all/20260908092730.4002628-1-rppt@kernel.org/T/#u > -- > Cheers, > Nathan -- Sincerely yours, Mike.