linux-kernel - [PATCH 4.18 139/158] f2fs: fix to wait on page writeback before updating page

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Message-Id: <20180917211717.561873574@linuxfoundation.org>
Date:   Tue, 18 Sep 2018 00:42:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chao Yu <yuchao0@...wei.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 139/158] f2fs: fix to wait on page writeback before updating page

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

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

From: Chao Yu <yuchao0@...wei.com>

[ Upstream commit 6aead1617b3adf2b7e2c56f0f13e4e0ee42ebb4a ]

In error path of f2fs_move_rehashed_dirents, inode page could be writeback
state, so we should wait on inode page writeback before updating it.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/f2fs/inline.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -498,6 +498,7 @@ static int f2fs_move_rehashed_dirents(st
 	return 0;
 recover:
 	lock_page(ipage);
+	f2fs_wait_on_page_writeback(ipage, NODE, true);
 	memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA(dir));
 	f2fs_i_depth_write(dir, 0);
 	f2fs_i_size_write(dir, MAX_INLINE_DATA(dir));