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Wed, 30 Oct 2019 22:28:47 -0700 (PDT) Received: from N-20L6PF1KTYA2 ([131.228.2.20]) by smtp.gmail.com with ESMTPSA id 9sm692327ljq.104.2019.10.30.22.28.44 (version=TLS1_2 cipher=AES128-GCM-SHA256 bits=128/128); Wed, 30 Oct 2019 22:28:46 -0700 (PDT) Date: Thu, 31 Oct 2019 13:28:44 +0800 From: "Li Xinhai" To: akpm , yang.shi Cc: "Vlastimil Babka" , mhocko , mgorman , stable , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] mm: mempolicy: fix the wrong return value and potential pages leak of mbind References: <1572454731-3925-1-git-send-email-yang.shi@linux.alibaba.com>, <12ac5b41-27a6-5a5b-0d07-7e9cb847829d@linux.alibaba.com>, <20191030213144.dd7cd8084d4171e29abba875@linux-foundation.org> X-Priority: 3 X-GUID: 5B940418-ADD3-460C-A293-B3EF73D36DAC X-Has-Attach: no X-Mailer: Foxmail 7.2.13.365[cn] Mime-Version: 1.0 Message-ID: <2019103113284316242158@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 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: T24gMjAxOS0xMC0zMcKgYXQgMTI6MzHCoEFuZHJldyBNb3J0b27CoHdyb3RlOgo+T24gV2VkLCAz MCBPY3QgMjAxOSAxMToxNDo1OCAtMDcwMCBZYW5nIFNoaSA8eWFuZy5zaGlAbGludXguYWxpYmFi YS5jb20+IHdyb3RlOgo+Cj4+IE9uIDEwLzMwLzE5IDk6NTggQU0sIFlhbmcgU2hpIHdyb3RlOgo+ PiA+IFRoZSBjb21taXQgZDg4MzU0NDUxNWFhICgibW06IG1lbXBvbGljeTogbWFrZSB0aGUgYmVo YXZpb3IgY29uc2lzdGVudAo+PiA+IHdoZW4gTVBPTF9NRl9NT1ZFKiBhbmQgTVBPTF9NRl9TVFJJ Q1Qgd2VyZSBzcGVjaWZpZWQiKSBmaXhlZCB0aGUgcmV0dXJuCj4+ID4gdmFsdWUgb2YgbWJpbmQo KSBmb3IgYSBjb3VwbGUgb2YgY29ybmVyIGNhc2VzLsKgIEJ1dCwgaXQgYWx0ZXJlZCB0aGUKPj4g PiBlcnJubyBmb3Igc29tZSBvdGhlciBjYXNlcywgZm9yIGV4YW1wbGUsIG1iaW5kKCkgc2hvdWxk IHJldHVybiAtRUZBVUxUCj4+ID4gd2hlbiBwYXJ0IG9yIGFsbCBvZiB0aGUgbWVtb3J5IHJhbmdl IHNwZWNpZmllZCBieSBub2RlbWFzayBhbmQgbWF4bm9kZQo+PiA+IHBvaW50c8KgIG91dHNpZGUg eW91ciBhY2Nlc3NpYmxlIGFkZHJlc3Mgc3BhY2UsIG9yIHRoZXJlIHdhcyBhbiB1bm1hcHBlZAo+ PiA+IGhvbGUgaW4gdGhlIHNwZWNpZmllZCBtZW1vcnkgcmFuZ2Ugc3BlY2lmaWVkIGJ5IGFkZHIg YW5kIGxlbi4KPj4gPgo+PiA+IEZpeGVkIHRoaXMgYnkgcHJlc2VydmluZyB0aGUgZXJybm8gcmV0 dXJuZWQgYnkgcXVldWVfcGFnZXNfcmFuZ2UoKS4KPj4gPiBBbmQsIHRoZSBwYWdlbGlzdCBtYXkg YmUgbm90IGVtcHR5IGV2ZW4gdGhvdWdoIHF1ZXVlX3BhZ2VzX3JhbmdlKCkKPj4gPiByZXR1cm5z IGVycm9yLCBwdXQgdGhlIHBhZ2VzIGJhY2sgdG8gTFJVIHNpbmNlIG1iaW5kX3JhbmdlKCkgaXMg bm90IGNhbGxlZAo+PiA+IHRvIHJlYWxseSBhcHBseSB0aGUgcG9saWN5IHNvIHRob3NlIHBhZ2Vz IHNob3VsZCBub3QgYmUgbWlncmF0ZWQsIHRoaXMKPj4gPiBpcyBhbHNvIHRoZSBvbGQgYmVoYXZp b3IgYmVmb3JlIHRoZSBwcm9ibGVtYXRpYyBjb21taXQuCj4+IEZvcmdvdCBmaXhlcyB0YWcuCj4+ Cj4+IEZpeGVzOiBkODgzNTQ0NTE1YWEgKCJtbTogbWVtcG9saWN5OiBtYWtlIHRoZSBiZWhhdmlv ciBjb25zaXN0ZW50IHdoZW4KPj4gTVBPTF9NRl9NT1ZFKiBhbmQgTVBPTF9NRl9TVFJJQ1Qgd2Vy ZSBzcGVjaWZpZWQiKQo+Cj5XaGF0J3MgdGhlIHJlbGF0aW9uc2hpcCBiZXR3ZWVuIHRoaXMgcGF0 Y2ggYW5kCj5odHRwOi8vbGttbC5rZXJuZWwub3JnL3IvMjAxOTEwMjkxNzU2MDQ1Mjg4MTI2QGdt YWlsLmNvbT8KPiAKClRoZXkgYXJlIGZvciBkaWZmZXJlbnQgaXNzdWVzLiBJIGZvdW5kIHRoYXQg LUVGQVVMVCBpcyBoaWRkZW4gZnJvbSB1c2VyIHNwYWNlIGJ5wqAKZDg4MzU0NDUxNWFhIHdoZW4g SSB3YXMgZml4aW5nIHRoZSB1bm1hcHBlZCBob2xlIGlzc3VlIHdoaWNoIGlzIGRlc2NyaWJlZCBp biAKeW91ciBxdW90ZWQgbGluay4KCk5vdywgaXQgaXMgZml4ZWQgZm9yIGJ5IGN1cnJlbnQgY29t bWl0IGluIHRoaXMgbWFpbCB0aHJlYWQuIEkgd2lsbCBleHBsYWluIHRoZSBvdGhlcsKgCm9uZSBp biBpdHMgdGhlYWQuwqAKCi0gWGluaGFp