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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D609CC77B7E for ; Sun, 28 May 2023 19:17:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229809AbjE1TRX (ORCPT ); Sun, 28 May 2023 15:17:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229795AbjE1TRV (ORCPT ); Sun, 28 May 2023 15:17:21 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28B3FA6 for ; Sun, 28 May 2023 12:17:20 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id BA6D761A00 for ; Sun, 28 May 2023 19:17:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5C03C433D2; Sun, 28 May 2023 19:17:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685301439; bh=7tGG+NOlssfu/NITwNH5Vwr/UrNSkYrA8md/wSgniNg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F41/agBGDsCvld6S21lDmKEJaioSs3QD+NiLIoe1DYBDD2yqarPUUYHgx8UgQjO7O EEnyNknu/jnMnSbFcmhckVbcRr2jikoRTXLHN/T5mnUxOdneX0Mai41I+zFAFQMqnz nwyFleJ1qPF6wuE2yRVA7G7MfA/lN+OBRasMI1z0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 4.19 030/132] f2fs: fix to drop all dirty pages during umount() if cp_error is set Date: Sun, 28 May 2023 20:09:29 +0100 Message-Id: <20230528190834.503251699@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230528190833.565872088@linuxfoundation.org> References: <20230528190833.565872088@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chao Yu [ Upstream commit c9b3649a934d131151111354bcbb638076f03a30 ] xfstest generic/361 reports a bug as below: f2fs_bug_on(sbi, sbi->fsync_node_num); kernel BUG at fs/f2fs/super.c:1627! RIP: 0010:f2fs_put_super+0x3a8/0x3b0 Call Trace: generic_shutdown_super+0x8c/0x1b0 kill_block_super+0x2b/0x60 kill_f2fs_super+0x87/0x110 deactivate_locked_super+0x39/0x80 deactivate_super+0x46/0x50 cleanup_mnt+0x109/0x170 __cleanup_mnt+0x16/0x20 task_work_run+0x65/0xa0 exit_to_user_mode_prepare+0x175/0x190 syscall_exit_to_user_mode+0x25/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc During umount(), if cp_error is set, f2fs_wait_on_all_pages() should not stop waiting all F2FS_WB_CP_DATA pages to be writebacked, otherwise, fsync_node_num can be non-zero after f2fs_wait_on_all_pages() causing this bug. In this case, to avoid deadloop in f2fs_wait_on_all_pages(), it needs to drop all dirty pages rather than redirtying them. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/checkpoint.c | 12 ++++++++++-- fs/f2fs/data.c | 3 ++- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index a563de5ccd217..621e0d4f1fbf5 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -273,8 +273,15 @@ static int __f2fs_write_meta_page(struct page *page, trace_f2fs_writepage(page, META); - if (unlikely(f2fs_cp_error(sbi))) + if (unlikely(f2fs_cp_error(sbi))) { + if (is_sbi_flag_set(sbi, SBI_IS_CLOSE)) { + ClearPageUptodate(page); + dec_page_count(sbi, F2FS_DIRTY_META); + unlock_page(page); + return 0; + } goto redirty_out; + } if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) goto redirty_out; if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0)) @@ -1185,7 +1192,8 @@ void f2fs_wait_on_all_pages_writeback(struct f2fs_sb_info *sbi) if (!get_pages(sbi, F2FS_WB_CP_DATA)) break; - if (unlikely(f2fs_cp_error(sbi))) + if (unlikely(f2fs_cp_error(sbi) && + !is_sbi_flag_set(sbi, SBI_IS_CLOSE))) break; io_schedule_timeout(5*HZ); diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 56b2dadd623b2..419586809cef6 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1885,7 +1885,8 @@ static int __write_data_page(struct page *page, bool *submitted, * don't drop any dirty dentry pages for keeping lastest * directory structure. */ - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode) && + !is_sbi_flag_set(sbi, SBI_IS_CLOSE)) goto redirty_out; goto out; } -- 2.39.2