From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.126.com (m16.mail.126.com [220.197.31.6]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 68C03213235; Fri, 23 May 2025 08:08:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.6 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747987722; cv=none; b=Zz5QONXXHnhnNOgJ4N0199B7rH7g+v5RFGlK7plTt4D+66gU/RwO/z1aV/R+DdKkxv1uzTLe+xLK2STDfA3F5cK/wKKLLgLpWsBxM+2Bf7Ss/TIm1Vxs2KVuIb7va1EOlbuB7eJvNDLmXKPMRiQ10sB4CeUQakUMsG/snBsCcqg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747987722; c=relaxed/simple; bh=MgVgCl1iX1UzjCpwnuVxFoJJLNutyQ18+npIzepKsvg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ZzZ6Ck0mXLIgslm3dI3omN/jfu9mMNb60AGeNnD+zxTBHyv5Yvlswm2dd50axiV8X9KsoTMeFYDZw1vaVzz1c2vZhdQIn1RsrtcxONMT9XJL/exEkIKgIkB9zymGCmPsoIqXfEYyMC93J7nW3bi2ICyOhNR5DrKQ/Vjl4wTeZE8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=126.com; spf=pass smtp.mailfrom=126.com; dkim=pass (1024-bit key) header.d=126.com header.i=@126.com header.b=SKPOna0M; arc=none smtp.client-ip=220.197.31.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=126.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=126.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=126.com header.i=@126.com header.b="SKPOna0M" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=Message-ID:Date:MIME-Version:Subject:To:From: Content-Type; bh=fYdsG1Zlzgn0Ck8jGE+RvNMGqHp4epmhTOfgvqbXWA0=; b=SKPOna0MvG79ANsXTA6n6MYbRIXPQHyD5dRORt9kesK+6/5ult/spC7nHzd4wF H++Hp26nQA53CZoWVckQbY3usXw0ZJxmeBmTK+PjXp3qI2AJZa1mZcQ4d5A6sJJh m0h0nncV4TWqCQVWH6tT5zOvjqCg5LGYpWDDiUEb+Gqns= Received: from [172.19.20.199] (unknown []) by gzga-smtp-mtada-g0-1 (Coremail) with SMTP id _____wDXP6PfLDBo7NZQAg--.42231S2; Fri, 23 May 2025 16:08:00 +0800 (CST) Message-ID: Date: Fri, 23 May 2025 16:07:59 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/hugetlb: fix kernel NULL pointer dereference when replacing free hugetlb folios To: Oscar Salvador Cc: Muchun Song , akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, 21cnbao@gmail.com, david@redhat.com, baolin.wang@linux.alibaba.com, liuzixing@hygon.cn References: <1747884137-26685-1-git-send-email-yangge1116@126.com> <644FF836-9DC7-42B4-BACE-C433E637B885@linux.dev> <3B8641A1-5345-44A5-B610-9BCBC980493D@linux.dev> <4e408146-7c77-4f6d-90e8-bb311d7ab53d@126.com> From: Ge Yang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wDXP6PfLDBo7NZQAg--.42231S2 X-Coremail-Antispam: 1Uf129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73 VFW2AGmfu7bjvjm3AaLaJ3UbIYCTnIWIevJa73UjIFyTuYvjxUxD73UUUUU X-CM-SenderInfo: 51dqwwjhrrila6rslhhfrp/1tbidRBWG2gwKKR7LAABsq 在 2025/5/23 13:30, Oscar Salvador 写道: > On Fri, May 23, 2025 at 11:46:51AM +0800, Ge Yang wrote: >> The implementation of alloc_and_dissolve_hugetlb_folio differs between >> kernel 6.6 and kernel 6.15. To facilitate backporting, I'm planning to >> submit another patch based on Oscar Salvador's suggestion. > > If the code differs a lot between a stable version and upstream, the way > to go is to submit a specific patch for the stable one that applies > to that tree, e.g: [PATCH 6.6]... > > Ok, thanks.