diff mbox series

[v2,11/14] ext4: clear BH_Uptodate flag on decryption error

Message ID 20190520162952.156212-12-ebiggers@kernel.org
State Not Applicable
Delegated to: Richard Weinberger
Headers show
Series fscrypt, ext4: prepare for blocksize != PAGE_SIZE | expand

Commit Message

Eric Biggers May 20, 2019, 4:29 p.m. UTC 
From: Chandan Rajendra <chandan@linux.ibm.com>

If decryption fails, ext4_block_write_begin() can return with the page's
buffer_head marked with the BH_Uptodate flag.  This commit clears the
BH_Uptodate flag in such cases.

Signed-off-by: Chandan Rajendra <chandan@linux.ibm.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 fs/ext4/inode.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 34fda4864c0eb..0e6536a22a465 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1229,10 +1229,14 @@  static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 		if (!buffer_uptodate(*wait_bh))
 			err = -EIO;
 	}
-	if (unlikely(err))
+	if (unlikely(err)) {
 		page_zero_new_buffers(page, from, to);
-	else if (decrypt)
+	} else if (decrypt) {
 		err = fscrypt_decrypt_pagecache_blocks(page, PAGE_SIZE, 0);
+		if (err)
+			clear_buffer_uptodate(*wait_bh);
+	}
+
 	return err;
 }
 #endif