linux-ext4 - [PATCH] ext4: unlock xattr_sem properly in ext4_inline_data

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Message-Id: <1604370542-124630-1-git-send-email-joseph.qi@linux.alibaba.com>
Date:   Tue,  3 Nov 2020 10:29:02 +0800
From:   Joseph Qi <joseph.qi@...ux.alibaba.com>
To:     Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>
Cc:     linux-ext4@...r.kernel.org, Jan Kara <jack@...e.cz>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Tao Ma <boyu.mt@...bao.com>
Subject: [PATCH] ext4: unlock xattr_sem properly in ext4_inline_data_truncate()

It takes xattr_sem to check inline data again but without unlock it
in case not have. So unlock it before return.

Fixes: aef1c8513c1f ("ext4: let ext4_truncate handle inline data correctly")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Cc: Tao Ma <boyu.mt@...bao.com>
Signed-off-by: Joseph Qi <joseph.qi@...ux.alibaba.com>
---
 fs/ext4/inline.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index caa5147..b41512d 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1880,6 +1880,7 @@ int ext4_inline_data_truncate(struct inode *inode, int *has_inline)
 
 	ext4_write_lock_xattr(inode, &no_expand);
 	if (!ext4_has_inline_data(inode)) {
+		ext4_write_unlock_xattr(inode, &no_expand);
 		*has_inline = 0;
 		ext4_journal_stop(handle);
 		return 0;
-- 
1.8.3.1