[RFC PATCH 04/16] DM: Ensure that the read request is within the device range.

[Ram Pai]

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

[RFC PATCH 04/16] DM: Ensure that the read request is within the device range.

[Ram Pai]

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