linux-kernel - [PATCH 4.4 43/88] ext4: missing unlock/put_page() in ext4_try_to_write_inline

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Date:   Fri, 11 Jan 2019 15:08:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Maurizio Lombardi <mlombard@...hat.com>,
        Theodore Tso <tytso@....edu>, stable@...nel.org
Subject: [PATCH 4.4 43/88] ext4: missing unlock/put_page() in ext4_try_to_write_inline_data()

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maurizio Lombardi <mlombard@...hat.com>

commit 132d00becb31e88469334e1e62751c81345280e0 upstream.

In case of error, ext4_try_to_write_inline_data() should unlock
and release the page it holds.

Fixes: f19d5870cbf7 ("ext4: add normal write support for inline data")
Cc: stable@...nel.org # 3.8
Signed-off-by: Maurizio Lombardi <mlombard@...hat.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext4/inline.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -701,8 +701,11 @@ int ext4_try_to_write_inline_data(struct
 
 	if (!PageUptodate(page)) {
 		ret = ext4_read_inline_page(inode, page);
-		if (ret < 0)
+		if (ret < 0) {
+			unlock_page(page);
+			put_page(page);
 			goto out_up_read;
+		}
 	}
 
 	ret = 1;