__ext4_block_zero_page_range decrypts the entire page. With block size <
page size this assumption is incorrect since the block to be decrypted
spans a sub-range of the page. This commit now passes the block's offset
within the page and also the length of the block as arguments to
fscrypt_decrypt_page().
Signed-off-by: Chandan Rajendra <chandan@xxxxxxxxxxxxxxxxxx>
---
fs/ext4/inode.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 736d209b..fbc89d9 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4050,9 +4050,10 @@ static int __ext4_block_zero_page_range(handle_t *handle,
ext4_encrypted_inode(inode)) {
/* We expect the key to be set. */
BUG_ON(!fscrypt_has_encryption_key(inode));
- BUG_ON(blocksize != PAGE_SIZE);
WARN_ON_ONCE(fscrypt_decrypt_page(page->mapping->host,
- page, PAGE_SIZE, 0, page->index));
+ page, blocksize,
+ round_down(offset, blocksize),
+ iblock));
}
}
if (ext4_should_journal_data(inode)) {
--
2.9.5
