From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ram Pai Subject: [RFC PATCH 04/16] DM: Ensure that the read request is within the device range. Date: Mon, 15 Aug 2016 10:36:41 -0700 Message-ID: <1471282613-31006-5-git-send-email-linuxram@us.ibm.com> References: <1471282613-31006-1-git-send-email-linuxram@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1471282613-31006-1-git-send-email-linuxram@us.ibm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: LKML , linux-raid@vger.kernel.org, dm-devel@redhat.com, linux-doc@vger.kernel.org Cc: shli@kernel.org, snitzer@redhat.com, agk@redhat.com, corbet@lwn.net List-Id: linux-raid.ids If a read request is not within the device range return error. Signed-off-by: Ram Pai --- drivers/md/dm-inplace-compress.c | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-) diff --git a/drivers/md/dm-inplace-compress.c b/drivers/md/dm-inplace-compress.c index 17221a1..bf18028 100644 --- a/drivers/md/dm-inplace-compress.c +++ b/drivers/md/dm-inplace-compress.c @@ -1025,6 +1025,12 @@ static void dm_icomp_read_one_extent(struct dm_icomp_req *req, u64 block, { struct dm_icomp_io_range *io; + if (block+(data_sectors>>DMCP_BLOCK_SECTOR_SHIFT) >= + req->info->data_blocks) { + req->result = -EIO; + return; + } + io = dm_icomp_create_io_range(req, data_sectors << 9, logical_sectors << 9); if (!io) { @@ -1063,7 +1069,9 @@ again: block_index = first_block_index + (logical_sectors >> DMCP_BLOCK_SECTOR_SHIFT); - if ((block_index << DMCP_BLOCK_SECTOR_SHIFT) < bio_end_sector(req->bio)) + if (((block_index << DMCP_BLOCK_SECTOR_SHIFT) < + bio_end_sector(req->bio)) && + ((block_index) < req->info->data_blocks)) goto again; /* A shortcut if all data is in already */ -- 1.7.1