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[2003:cb:c711:b800:254c:2d22:aab2:20a]) by smtp.gmail.com with ESMTPSA id c5sm2914605edk.43.2022.02.17.00.56.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 17 Feb 2022 00:56:56 -0800 (PST) Message-ID: Date: Thu, 17 Feb 2022 09:56:56 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH] mm: fix dereference a null pointer in migrate[_huge]_page_move_mapping() Content-Language: en-US To: =?UTF-8?B?5p2O5Yqb55C8?= , Greg KH Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20220217063808.42018-1-liqiong@nfschina.com> <8f00ecbf-245d-f063-40a3-4aaa77680b73@nfschina.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <8f00ecbf-245d-f063-40a3-4aaa77680b73@nfschina.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17.02.22 09:48, 李力琼 wrote: > 在 2022/2/17 下午3:51, David Hildenbrand 写道: >> On 17.02.22 08:29, Greg KH wrote: >>> On Thu, Feb 17, 2022 at 02:38:08PM +0800, liqiong wrote: >>>> Upstream has no this bug. >>> What do you mean by this? >>> >>> confused, >> Dito. If this is fixed upstream and broken in stable kernels, we'd want >> either a backport of the relevant upstream fix, or if too complicated, a >> stable-only fix. >> >> > There is a wrong describe， i thought 'Upstream' as the newest code. > The newest code has no this bug, i should submit this patch to "longterm:4.19". See https://www.kernel.org/doc/Documentation/process/stable-kernel-rules.rst Make sure your patch subject starts with something like "[PATCH 4.19 STABLE]" and that your patch targets that stable branch. Make sure to describe why it doesn't apply to upstream, how it was fixed upstream, and why we cannot simply backport the upstream way to fix it. Thanks! -- Thanks, David / dhildenb