Commit 7e0785fc authored May 20, 2019 by Chandan Rajendra Committed by Eric Biggers May 28, 2019

ext4: clear BH_Uptodate flag on decryption error



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>

parent ffceeefb

fs/ext4/inode.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -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

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