From: Chao Yu Subject: [PATCH] f2fs crypto: zero next free dnode block Date: Mon, 18 May 2015 18:00:06 +0800 Message-ID: <003101d09151$85408140$8fc183c0$@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Content-language: zh-cn Sender: linux-kernel-owner@vger.kernel.org To: Jaegeuk Kim , Changman Lee Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org List-Id: linux-f2fs-devel.lists.sourceforge.net Now page cache of meta inode is used by garbage collection for encrypted page, it may contain random data, so we should zero it before issuing discard. Signed-off-by: Chao Yu --- fs/f2fs/segment.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 16aa66e..bdf874a 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -504,7 +504,7 @@ void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr) if (err) { struct page *page = grab_meta_page(sbi, blkaddr); - /* zero-filled page */ + memset(page_address(page), 0, F2FS_BLKSIZE); set_page_dirty(page); f2fs_put_page(page, 1); } -- 2.3.3