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 E4B4827FB2A for ; Thu, 26 Mar 2026 00:28:22 +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=1774484903; cv=none; b=Wbd+C9osx0bv1nGuMwTDrkGQjXQm6ubtCeU3cMWYogpLxhEtBOgZpokGVCIE1X0FNoMFRvBJkxBKX9UXDX/ZBQ9qnOpF8WjqxJAoQUK5wskcieeak/vadm0XQbOJo0Ry5VTDGl53/LXcoBoH55LzvgBdDGY+AS1ne5+8y7PE1ao= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774484903; c=relaxed/simple; bh=w/b8eyEOh/mk1W3dBx5+GgWy18Ixkyxc+RfaUwy7zlg=; h=Date:From:To:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=HaK+AXb/uhlqLqjG7/V6YwEdse/GbA1Fra4TwVvbTYt1+Dx0GqmT6DHjAnOHiVUwbHLk7XOCDWHLsDNi6a4efN07BYsT14UZrRoLJfHB2UnTIllWsKMbsSiHuswrrL35muA4U0APww7vIwh0prqIJGeKDTQjCog8DP1nSe6RWD4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=RC0dW/1l; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="RC0dW/1l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12576C4CEF7; Thu, 26 Mar 2026 00:28:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1774484902; bh=w/b8eyEOh/mk1W3dBx5+GgWy18Ixkyxc+RfaUwy7zlg=; h=Date:From:To:Subject:In-Reply-To:References:From; b=RC0dW/1lAhJ+jsD6juY3kSZgjXnUdGcAuLneGLOX4lepKrAIjVqL9AWTGUnpjG+5v 4OMN9fMsnC3uuqWG/ALz8kW/ln2EyMAbiWATu2v9u6/6sZyAoavgaI2hhLAy4YsbAq /CorONRKp3kt22ef4Sf1mH8PKy8aVgMdvqLzIjng= Date: Wed, 25 Mar 2026 17:28:20 -0700 From: Andrew Morton To: Qi Zheng , hannes@cmpxchg.org, hughd@google.com, mhocko@suse.com, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, david@kernel.org, ljs@kernel.org, ziy@nvidia.com, harry.yoo@oracle.com, yosry.ahmed@linux.dev, imran.f.khan@oracle.com, kamalesh.babulal@oracle.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, chenridong@huaweicloud.com, mkoutny@suse.com, hamzamahfooz@linux.microsoft.com, apais@linux.microsoft.com, lance.yang@linux.dev, bhe@redhat.com, usamaarif642@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Qi Zheng Subject: Re: [PATCH v2 0/4] fix unexpected type conversions and potential overflows Message-Id: <20260325172820.95a0ecda646c6c06dfc97ee0@linux-foundation.org> In-Reply-To: <20260325165716.5d63522ba825f25a63e74e3e@linux-foundation.org> References: <20260325165716.5d63522ba825f25a63e74e3e@linux-foundation.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) 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-Transfer-Encoding: 7bit On Wed, 25 Mar 2026 16:57:16 -0700 Andrew Morton wrote: > I'm inclined to mark this "don't care". But if we decide to backport > [2/4] ("to prevent potential overflow issues") then we might have a > problem. > > Also, if some downstream person decides to backport [2/4] into their > kernel without [4/4] then they'll have a bad day. > > So perhaps this issue should be addressed within [2/4]? Actually I can trivially do this locally if you like - just turn [4/4] into a -fix patch against [2/4], squash them together later on. Please lmk if you'd like me to do that.