* [PATCH] f2fs crypto: zero next free dnode block
@ 2015-05-18 10:00 Chao Yu
0 siblings, 0 replies; only message in thread
From: Chao Yu @ 2015-05-18 10:00 UTC (permalink / raw)
To: Jaegeuk Kim, Changman Lee; +Cc: linux-f2fs-devel, linux-kernel
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 <chao2.yu@samsung.com>
---
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
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