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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 2D658C433E0 for ; Tue, 5 Jan 2021 04:17:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EFB30225A9 for ; Tue, 5 Jan 2021 04:17:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728301AbhAEERX (ORCPT ); Mon, 4 Jan 2021 23:17:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46474 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727979AbhAEERW (ORCPT ); Mon, 4 Jan 2021 23:17:22 -0500 Received: from mail-pg1-x52e.google.com (mail-pg1-x52e.google.com [IPv6:2607:f8b0:4864:20::52e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78B6AC061574 for ; Mon, 4 Jan 2021 20:16:42 -0800 (PST) Received: by mail-pg1-x52e.google.com with SMTP id v19so20438712pgj.12 for ; Mon, 04 Jan 2021 20:16:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=KKJkbK/0qA+AFIpsLjEXS6BAkzyO10SmGNn3wBUtxds=; b=vZHsRpHgkgF0zLNjP+xBufgtv7dHa1rQX/fu7pMroYBepvJoKeH0EEfEL7Kk92+qSb sSC7BPhPTxc8qh1+Mn5WGivBgcFgLBVFqZAhLsGVHMbmdQmCFExWsgwgesT6JxjUJHhN lM85YM6CAC9z3LXeZ28sfxWamikxJUHCEpoxEPiMyhj3H5XextGe1GlbOqGnbtmwGPdq +Yo2jpf1aCReEdc7eFgBkXVg/Qu9HNsQEjRzg6K8g4SpdEcGdCBudOZu2keZNJnssLeC 7u1xTxxl1DlJveLHtiZubKGw94x/jA0EWks1tM0w4qasSKXokW9KMEv2Lqx14nH4bewU ENXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=KKJkbK/0qA+AFIpsLjEXS6BAkzyO10SmGNn3wBUtxds=; b=G2Qi5Ipyt6mGyVCK4Rq/TjJL5tE8ZstFyVoFBbIJbv/hWqb2c/VkWRQZU1tAde6NoV kkSOSVURYutAPhhaqy9/koKO1MD4LQ+0uL0K6wJ+ueL//f0JUk4JBocpcqs3kBka+Vxq TqMdhfwyNYijIDHFrmq2kZFNB/B5Wfd4hbByVs/gsb3JAovAN2D+WmqeVNe1zzaQLODf O5szivdk+Yawj7I7ENk3X+o3/2nHQzh0W5eFOrzAifub189FxghB8IqefUOQeKkkaoAI xJfzXxczbS8mKkT5UCsDhT/9g5zNcwgY4DCHMAG4AU6XnMtPHzydF5Bcyrf5xrIIPaPi IYKQ== X-Gm-Message-State: AOAM533qx/Bgfzp6vVh3vKgDsv/A4geT1VpOAFroF+doi/csE5J5oYZF 7EcG5p3C6XqZn+Wivi1XURFW0BSZ8QU= X-Google-Smtp-Source: ABdhPJyuZyKbboWOveGvhjaA3osqPGnttsU+9vHA46r2c5H3DyYcaw0SWeZFljRHgwO3gYp+wF5rrw== X-Received: by 2002:a62:e212:0:b029:19d:8cff:f179 with SMTP id a18-20020a62e2120000b029019d8cfff179mr68030607pfi.44.1609820201665; Mon, 04 Jan 2021 20:16:41 -0800 (PST) Received: from daehojeong1.seo.corp.google.com ([2401:fa00:d:11:a6ae:11ff:fe18:6ce2]) by smtp.gmail.com with ESMTPSA id z23sm48634077pfj.143.2021.01.04.20.16.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Jan 2021 20:16:40 -0800 (PST) From: Daeho Jeong To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, kernel-team@android.com Cc: Daeho Jeong , Colin Ian King Subject: [PATCH v2] f2fs: fix null page reference in redirty_blocks Date: Tue, 5 Jan 2021 13:16:30 +0900 Message-Id: <20210105041630.1393157-1-daeho43@gmail.com> X-Mailer: git-send-email 2.29.2.729.g45daf8777d-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daeho Jeong Fixed null page reference when find_lock_page() fails in redirty_blocks(). Signed-off-by: Daeho Jeong Reported-by: Colin Ian King Fixes: 5fdb322ff2c2 ("f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE") --- v2: changed error value and break the loop when error occurs --- fs/f2fs/file.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 9e5275716be8..d27173c24391 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -4060,8 +4060,10 @@ static int redirty_blocks(struct inode *inode, pgoff_t page_idx, int len) for (i = 0; i < page_len; i++, redirty_idx++) { page = find_lock_page(mapping, redirty_idx); - if (!page) - ret = -ENOENT; + if (!page) { + ret = -ENOMEM; + break; + } set_page_dirty(page); f2fs_put_page(page, 1); f2fs_put_page(page, 0); -- 2.29.2.729.g45daf8777d-goog