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Thu, 17 Dec 2020 18:28:47 +0800 Message-ID: <1608200928.31376.37.camel@mtksdccf07> Subject: Re: [PATCH 1/1] kasan: fix memory leak of kasan quarantine From: Kuan-Ying Lee To: Andrey Ryabinin CC: Alexander Potapenko , Dmitry Vyukov , Andrew Morton , "Matthias Brugger" , , , , , , , Date: Thu, 17 Dec 2020 18:28:48 +0800 In-Reply-To: <1608031683-24967-2-git-send-email-Kuan-Ying.Lee@mediatek.com> References: <1608031683-24967-1-git-send-email-Kuan-Ying.Lee@mediatek.com> <1608031683-24967-2-git-send-email-Kuan-Ying.Lee@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 2752E72A10EB865FFDCC2B6C40094E72E1BF4CF53284D1973037E26C5DE696AE2000:8 X-MTK: N Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gVHVlLCAyMDIwLTEyLTE1IGF0IDE5OjI4ICswODAwLCBLdWFuLVlpbmcgTGVlIHdyb3RlOg0K PiBXaGVuIGNwdSBpcyBnb2luZyBvZmZsaW5lLCBzZXQgcS0+b2ZmbGluZSBhcyB0cnVlDQo+IGFu ZCBpbnRlcnJ1cHQgaGFwcGVuZWQuIFRoZSBpbnRlcnJ1cHQgbWF5IGNhbGwgdGhlDQo+IHF1YXJh bnRpbmVfcHV0LiBCdXQgcXVhcmFudGluZV9wdXQgZG8gbm90IGZyZWUgdGhlDQo+IHRoZSBvYmpl Y3QuIFRoZSBvYmplY3Qgd2lsbCBjYXVzZSBtZW1vcnkgbGVhay4NCj4gDQo+IEFkZCBxbGlua19m cmVlKCkgdG8gZnJlZSB0aGUgb2JqZWN0Lg0KPiANCj4gU2lnbmVkLW9mZi1ieTogS3Vhbi1ZaW5n IExlZSA8S3Vhbi1ZaW5nLkxlZUBtZWRpYXRlay5jb20+DQo+IENjOiBBbmRyZXkgUnlhYmluaW4g PGFyeWFiaW5pbkB2aXJ0dW96em8uY29tPg0KPiBDYzogQWxleGFuZGVyIFBvdGFwZW5rbyA8Z2xp ZGVyQGdvb2dsZS5jb20+DQo+IENjOiBEbWl0cnkgVnl1a292IDxkdnl1a292QGdvb2dsZS5jb20+ DQo+IENjOiBBbmRyZXcgTW9ydG9uIDxha3BtQGxpbnV4LWZvdW5kYXRpb24ub3JnPg0KPiBDYzog TWF0dGhpYXMgQnJ1Z2dlciA8bWF0dGhpYXMuYmdnQGdtYWlsLmNvbT4NCj4gQ2M6IDxzdGFibGVA dmdlci5rZXJuZWwub3JnPiAgICBbNS4xMC1dDQo+IC0tLQ0KPiAgbW0va2FzYW4vcXVhcmFudGlu ZS5jIHwgMSArDQo+ICAxIGZpbGUgY2hhbmdlZCwgMSBpbnNlcnRpb24oKykNCj4gDQo+IGRpZmYg LS1naXQgYS9tbS9rYXNhbi9xdWFyYW50aW5lLmMgYi9tbS9rYXNhbi9xdWFyYW50aW5lLmMNCj4g aW5kZXggMGUzZjg0OTQ2MjhmLi5jYWM3YzYxN2RmNzIgMTAwNjQ0DQo+IC0tLSBhL21tL2thc2Fu L3F1YXJhbnRpbmUuYw0KPiArKysgYi9tbS9rYXNhbi9xdWFyYW50aW5lLmMNCj4gQEAgLTE5MSw2 ICsxOTEsNyBAQCB2b2lkIHF1YXJhbnRpbmVfcHV0KHN0cnVjdCBrYXNhbl9mcmVlX21ldGEgKmlu Zm8sIHN0cnVjdCBrbWVtX2NhY2hlICpjYWNoZSkNCj4gIA0KPiAgCXEgPSB0aGlzX2NwdV9wdHIo JmNwdV9xdWFyYW50aW5lKTsNCj4gIAlpZiAocS0+b2ZmbGluZSkgew0KPiArCQlxbGlua19mcmVl KCZpbmZvLT5xdWFyYW50aW5lX2xpbmssIGNhY2hlKTsNCj4gIAkJbG9jYWxfaXJxX3Jlc3RvcmUo ZmxhZ3MpOw0KPiAgCQlyZXR1cm47DQo+ICAJfQ0KDQpTb3JyeS4NCg0KUGxlYXNlIGlnbm9yZSB0 aGlzIHBhdGNoLg0KDQpUaGFua3MuDQo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A572AC4361B for ; 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Thu, 17 Dec 2020 18:28:47 +0800 Message-ID: <1608200928.31376.37.camel@mtksdccf07> Subject: Re: [PATCH 1/1] kasan: fix memory leak of kasan quarantine From: Kuan-Ying Lee To: Andrey Ryabinin Date: Thu, 17 Dec 2020 18:28:48 +0800 In-Reply-To: <1608031683-24967-2-git-send-email-Kuan-Ying.Lee@mediatek.com> References: <1608031683-24967-1-git-send-email-Kuan-Ying.Lee@mediatek.com> <1608031683-24967-2-git-send-email-Kuan-Ying.Lee@mediatek.com> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 2752E72A10EB865FFDCC2B6C40094E72E1BF4CF53284D1973037E26C5DE696AE2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201217_053423_665411_89DE0AD8 X-CRM114-Status: GOOD ( 17.55 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wsd_upstream@mediatek.com, stable@vger.kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, Alexander Potapenko , linux-arm-kernel@lists.infradead.org, Matthias Brugger , linux-mediatek@lists.infradead.org, Andrew Morton , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Tue, 2020-12-15 at 19:28 +0800, Kuan-Ying Lee wrote: > When cpu is going offline, set q->offline as true > and interrupt happened. The interrupt may call the > quarantine_put. But quarantine_put do not free the > the object. The object will cause memory leak. > > Add qlink_free() to free the object. > > Signed-off-by: Kuan-Ying Lee > Cc: Andrey Ryabinin > Cc: Alexander Potapenko > Cc: Dmitry Vyukov > Cc: Andrew Morton > Cc: Matthias Brugger > Cc: [5.10-] > --- > mm/kasan/quarantine.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c > index 0e3f8494628f..cac7c617df72 100644 > --- a/mm/kasan/quarantine.c > +++ b/mm/kasan/quarantine.c > @@ -191,6 +191,7 @@ void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache) > > q = this_cpu_ptr(&cpu_quarantine); > if (q->offline) { > + qlink_free(&info->quarantine_link, cache); > local_irq_restore(flags); > return; > } Sorry. Please ignore this patch. Thanks. _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CAA87C4361B for ; Thu, 17 Dec 2020 10:35:45 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 48F2623741 for ; 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Thu, 17 Dec 2020 02:28:59 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 17 Dec 2020 02:28:56 -0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 17 Dec 2020 18:28:47 +0800 Received: from [172.21.84.99] (172.21.84.99) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 17 Dec 2020 18:28:47 +0800 Message-ID: <1608200928.31376.37.camel@mtksdccf07> Subject: Re: [PATCH 1/1] kasan: fix memory leak of kasan quarantine From: Kuan-Ying Lee To: Andrey Ryabinin Date: Thu, 17 Dec 2020 18:28:48 +0800 In-Reply-To: <1608031683-24967-2-git-send-email-Kuan-Ying.Lee@mediatek.com> References: <1608031683-24967-1-git-send-email-Kuan-Ying.Lee@mediatek.com> <1608031683-24967-2-git-send-email-Kuan-Ying.Lee@mediatek.com> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-TM-SNTS-SMTP: 2752E72A10EB865FFDCC2B6C40094E72E1BF4CF53284D1973037E26C5DE696AE2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201217_053423_665411_89DE0AD8 X-CRM114-Status: GOOD ( 17.55 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wsd_upstream@mediatek.com, stable@vger.kernel.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, Alexander Potapenko , linux-arm-kernel@lists.infradead.org, Matthias Brugger , linux-mediatek@lists.infradead.org, Andrew Morton , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 2020-12-15 at 19:28 +0800, Kuan-Ying Lee wrote: > When cpu is going offline, set q->offline as true > and interrupt happened. The interrupt may call the > quarantine_put. But quarantine_put do not free the > the object. The object will cause memory leak. > > Add qlink_free() to free the object. > > Signed-off-by: Kuan-Ying Lee > Cc: Andrey Ryabinin > Cc: Alexander Potapenko > Cc: Dmitry Vyukov > Cc: Andrew Morton > Cc: Matthias Brugger > Cc: [5.10-] > --- > mm/kasan/quarantine.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c > index 0e3f8494628f..cac7c617df72 100644 > --- a/mm/kasan/quarantine.c > +++ b/mm/kasan/quarantine.c > @@ -191,6 +191,7 @@ void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache) > > q = this_cpu_ptr(&cpu_quarantine); > if (q->offline) { > + qlink_free(&info->quarantine_link, cache); > local_irq_restore(flags); > return; > } Sorry. Please ignore this patch. Thanks. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel