From 2887df139c40512cdc147d1a84d95d4f3d261bd1 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Tue, 29 Apr 2008 22:02:07 -0400 Subject: [PATCH] ext4: Fix hang on umount with quotas when journal is aborted 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 Signed-off-by: Mingming Cao CC: Payphone LIOU Signed-off-by: "Theodore Ts'o" --- fs/ext4/super.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 93a7e74..e3b3483 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3040,8 +3040,14 @@ 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) -- 2.7.4