From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yunlei He Subject: [PATCH] f2fs: fix a panic caused by NULL flush_cmd_control Date: Thu, 1 Jun 2017 16:43:51 +0800 Message-ID: <1496306631-23944-1-git-send-email-heyunlei@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1dGLto-0001kH-E6 for linux-f2fs-devel@lists.sourceforge.net; Thu, 01 Jun 2017 08:56:08 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1dGLth-0008Pj-Nb for linux-f2fs-devel@lists.sourceforge.net; Thu, 01 Jun 2017 08:56:08 +0000 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: jaegeuk@kernel.org, yuchao0@huawei.com, linux-f2fs-devel@lists.sourceforge.net Mount fs with option noflush_merge, boot failed for illegal address fcc in function f2fs_issue_flush: if (!test_opt(sbi, FLUSH_MERGE)) { ret = submit_flush_wait(sbi); atomic_inc(&fcc->issued_flush); -> Here, fcc illegal return ret; } Signed-off-by: Yunlei He --- fs/f2fs/segment.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index a8f4c81..029b5ea 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -566,6 +566,9 @@ int create_flush_cmd_control(struct f2fs_sb_info *sbi) init_waitqueue_head(&fcc->flush_wait_queue); init_llist_head(&fcc->issue_list); SM_I(sbi)->fcc_info = fcc; + if (!test_opt(sbi, FLUSH_MERGE)) + return err; + init_thread: fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi, "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev)); @@ -3239,7 +3242,7 @@ int build_segment_manager(struct f2fs_sb_info *sbi) INIT_LIST_HEAD(&sm_info->sit_entry_set); - if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) { + if (!f2fs_readonly(sbi->sb)) { err = create_flush_cmd_control(sbi); if (err) return err; -- 1.9.1 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot