From patchwork Fri Aug 30 23:04:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11124671 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D5C9713B1 for ; Fri, 30 Aug 2019 23:04:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9A09A2343B for ; Fri, 30 Aug 2019 23:04:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="D50zJ+/7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A09A2343B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 973646B000D; Fri, 30 Aug 2019 19:04:46 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 8FBF36B000E; Fri, 30 Aug 2019 19:04:46 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 812D16B0010; Fri, 30 Aug 2019 19:04:46 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0135.hostedemail.com [216.40.44.135]) by kanga.kvack.org (Postfix) with ESMTP id 5CD0F6B000D for ; Fri, 30 Aug 2019 19:04:46 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 15EAD181AC9AE for ; Fri, 30 Aug 2019 23:04:46 +0000 (UTC) X-FDA: 75880625772.12.dress82_29943eabde663 X-Spam-Summary: 2,0,0,fa6614bae2b782ea,d41d8cd98f00b204,akpm@linux-foundation.org,:akpm@linux-foundation.org:gustavo@embeddedor.com:henrywolfeburns@gmail.com::mm-commits@vger.kernel.org:shakeelb@google.com:torvalds@linux-foundation.org:vitalywool@gmail.com,RULES_HIT:41:355:379:800:960:967:973:988:989:1260:1263:1345:1381:1431:1437:1534:1541:1711:1714:1730:1747:1777:1792:2393:2525:2559:2563:2682:2685:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3350:3868:3870:3871:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4321:5007:6238:6261:6653:7514:7576:7903:8599:9025:9545:10004:10913:11026:11658:11914:12043:12048:12297:12517:12519:12555:12679:12696:12698:12737:12783:12986:13069:13311:13357:14181:14384:14664:14721:14849:21080:21250:21451:21627:21939:30054:30070:30080,0,RBL:error,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:26,LUA_SUMMARY:none X-HE-Tag: dress82_29943eabde663 X-Filterd-Recvd-Size: 2412 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Fri, 30 Aug 2019 23:04:45 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5F16123697; Fri, 30 Aug 2019 23:04:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567206284; bh=a37g0eP2XAZbu1KkdNxknxGq8kdrXBvTIl3LceIVzJk=; h=Date:From:To:Subject:From; b=D50zJ+/7TJiChRwSBFsyggfPRHNBiWXozCS9CKsfryFxfXtBrLJpp8zFoOkoBuiiU brXgdRijMDSj4J3mucymVK/vK+v6T3N8rsaHi5DZW/NDZjPuSmfiT5/BNP3iRBljgI 21aT/zLDBedp+gc4RKNHRxEpsjrXbRfuS9efSo/Y= Date: Fri, 30 Aug 2019 16:04:43 -0700 From: akpm@linux-foundation.org To: akpm@linux-foundation.org, gustavo@embeddedor.com, henrywolfeburns@gmail.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, shakeelb@google.com, torvalds@linux-foundation.org, vitalywool@gmail.com Subject: [patch 4/7] mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate Message-ID: <20190830230443.qFvaKz7QH%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 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: From: "Gustavo A. R. Silva" Subject: mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate Fix lock/unlock imbalance by unlocking *zhdr* before return. Addresses Coverity ID 1452811 ("Missing unlock") Link: http://lkml.kernel.org/r/20190826030634.GA4379@embeddedor Fixes: d776aaa9895e ("mm/z3fold.c: fix race between migration and destruction") Signed-off-by: Gustavo A. R. Silva Reviewed-by: Andrew Morton Cc: Henry Burns Cc: Vitaly Wool Cc: Shakeel Butt Signed-off-by: Andrew Morton --- mm/z3fold.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/z3fold.c~mm-z3foldc-fix-lock-unlock-imbalance-in-z3fold_page_isolate +++ a/mm/z3fold.c @@ -1406,6 +1406,7 @@ static bool z3fold_page_isolate(struct p * should freak out. */ WARN(1, "Z3fold is experiencing kref problems\n"); + z3fold_page_unlock(zhdr); return false; } z3fold_page_unlock(zhdr);