The patch converting udf_adinicb_writepage() to avoid manually kmapping
the page used memcpy_to_page() however that copies in the wrong
direction (effectively overwriting file data with the old contents).
What we should be using is memcpy_from_page() to copy data from the page
into the inode and then mark inode dirty to store the data.
Fixes: 5cfc45321a6d ("udf: Convert udf_adinicb_writepage() to memcpy_to_page()")
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/udf/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index f7a9607c2b95..facaf3a20625 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -193,7 +193,7 @@ static int udf_adinicb_writepage(struct folio *folio,
struct udf_inode_info *iinfo = UDF_I(inode);
BUG_ON(!PageLocked(page));
- memcpy_to_page(page, 0, iinfo->i_data + iinfo->i_lenEAttr,
+ memcpy_from_page(iinfo->i_data + iinfo->i_lenEAttr, page, 0,
i_size_read(inode));
unlock_page(page);
mark_inode_dirty(inode);
--
2.35.3
