From: Jan Kara Subject: [PATCH] ext4: Fix hang on umount with quotas when journal is aborted Date: Wed, 2 Apr 2008 11:10:07 +0200 Message-ID: <20080402091006.GD2716@duck.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Payphone LIOU , Andrew Morton , linux-kernel@vger.kernel.org To: linux-ext4@vger.kernel.org Return-path: Received: from styx.suse.cz ([82.119.242.94]:58584 "EHLO mail.suse.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752394AbYDBJKI (ORCPT ); Wed, 2 Apr 2008 05:10:08 -0400 Content-Disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: Call dquot_drop() from ext4_dquot_drop() even if we fail to start a transaction. Otherwise we never get to dropping references to quota structures from the inode and umount will hang indefinitely. Thanks to Payphone LIOU for spotting the problem. Signed-off-by: Jan Kara CC: Payphone LIOU --- I'm not sure if this should go through ext4 patch queue or through Andrew. It should not collide with anything so it probably does not matter much... fs/ext4/super.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 13383ba..286acec 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3039,8 +3039,14 @@ static int ext4_dquot_drop(struct inode *inode) /* We may delete quota structure so we need to reserve enough blocks */ handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); - if (IS_ERR(handle)) + if (IS_ERR(handle)) { + /* + * We call dquot_drop() anyway to at least release references + * to quota structures so that umount does not hang. + */ + dquot_drop(inode); return PTR_ERR(handle); + } ret = dquot_drop(inode); err = ext4_journal_stop(handle); if (!ret) -- 1.5.2.4