From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Eryu Guan , Theodore Ts'o , Kamal Mostafa Subject: [PATCH 4.2.y-ckt 90/98] ext4: iterate over buffer heads correctly in move_extent_per_page() Date: Tue, 15 Mar 2016 16:31:24 -0700 Message-Id: <1458084692-23100-91-git-send-email-kamal@canonical.com> In-Reply-To: <1458084692-23100-1-git-send-email-kamal@canonical.com> References: <1458084692-23100-1-git-send-email-kamal@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.2.8-ckt6 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Eryu Guan commit 6ffe77bad545f4a7c8edd2a4ee797ccfcd894ab4 upstream. In commit bcff24887d00 ("ext4: don't read blocks from disk after extents being swapped") bh is not updated correctly in the for loop and wrong data has been written to disk. generic/324 catches this on sub-page block size ext4. Fixes: bcff24887d00 ("ext4: don't read blocks from disk after extentsbeing swapped") Signed-off-by: Eryu Guan Signed-off-by: Theodore Ts'o Signed-off-by: Kamal Mostafa --- fs/ext4/move_extent.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index e032a04..4098acc 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -390,6 +390,7 @@ data_copy: *err = ext4_get_block(orig_inode, orig_blk_offset + i, bh, 0); if (*err < 0) break; + bh = bh->b_this_page; } if (!*err) *err = block_commit_write(pagep[0], from, from + replaced_size); -- 2.7.0