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b=MjY/HB9fglm3RR9yjFHrErDDhjl2mpNchHTuMZPLSRlKBY802XFzhXarLC0b589ez cNjeuOJlejNZ+h2vXKbu1g4+gz0NxqaJxehHi5ln0zPn7PF5Xuqb4KWxcTW3Omf1tu Z6UvQ41VMPxOfmtoM7MwEpeAZr/hEWbWIg/CvOFM= Date: Wed, 27 Dec 2023 12:58:53 -0800 From: Andrew Morton To: Chengming Zhou Cc: Barry Song <21cnbao@gmail.com>, Seth Jennings , Johannes Weiner , Vitaly Wool , Nhat Pham , Chris Li , Yosry Ahmed , Dan Streetman , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Chris Li Subject: Re: [PATCH v4 1/6] mm/zswap: change dstmem size to one page Message-Id: <20231227125853.2dd07cd61f8a8df95042677c@linux-foundation.org> In-Reply-To: References: <20231213-zswap-dstmem-v4-0-f228b059dd89@bytedance.com> <20231213-zswap-dstmem-v4-1-f228b059dd89@bytedance.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 3ACCE16000D X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: jwoqnafef8dzesmex8181om8sek3hg3x X-HE-Tag: 1703710736-751188 X-HE-Meta: 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 KVbSroQn FbneLT/VPxSzFPw9iFGTm08UdRXZWw8pK7qthpBo88/Wn9n3i1yUlQwn8UBvuBVRaGX1fYoKMujbVQsDUa04VREod42Hfq4fOK16lhzrBieQhNibOg1L7QEnpdWVsXM6l0E4aLsu+0bKrrWplgHuH8K7iETMIDmyavK3B0mH4Hfx1fEixPHB84Owck/mbiMynC4I0RUygrHk/LWrGBxrxPrKpuYQVHDRWstW5aSApEugrL2K8+5TmJBGgZgjy+Ox1pPf7QoWHNXe8Yic3kReKe+KbaU+BJUfPBliN 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: List-Subscribe: List-Unsubscribe: On Wed, 27 Dec 2023 14:11:06 +0800 Chengming Zhou wrote: > > i remember there was an over-compression case, that means the compressed > > data can be bigger than the source data. the similar thing is also done in zram > > drivers/block/zram/zcomp.c > > Right, there is a buffer overflow report[1] that I just +to you. What does "[1]" refer to? Is there a bug report about this series?