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[2003:cb:c711:b800:254c:2d22:aab2:20a]) by smtp.gmail.com with ESMTPSA id h11sm20171914wrr.64.2022.02.16.23.51.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 16 Feb 2022 23:51:12 -0800 (PST) Message-ID: Date: Thu, 17 Feb 2022 08:51:11 +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() To: Greg KH , liqiong Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20220217063808.42018-1-liqiong@nfschina.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: E4311A0004 X-Stat-Signature: qao1j3k6gkteszf5sikpik4sr5fehyxz Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=PhNlYT1z; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf15.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.129.124) smtp.mailfrom=david@redhat.com X-HE-Tag: 1645084275-962342 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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. -- Thanks, David / dhildenb