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linux-uconsole/drivers/md
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Heinz Mauelshagen bd86e7cb77 dm cache: fix access beyond end of origin device 
commit e893fba90c upstream.

In order to avoid wasting cache space a partial block at the end of the
origin device is not cached.  Unfortunately, the check for such a
partial block at the end of the origin device was flawed.

Fix accesses beyond the end of the origin device that occured due to
attempted promotion of an undetected partial block by:

- initializing the per bio data struct to allow cache_end_io to work properly
- recognizing access to the partial block at the end of the origin device
- avoiding out of bounds access to the discard bitset

Otherwise, users can experience errors like the following:

 attempt to access beyond end of device
 dm-5: rw=0, want=20971520, limit=20971456
 ...
 device-mapper: cache: promotion failed; couldn't copy block

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-03-23 21:38:18 -07:00
..
bcache bcache: Data corruption fix 2014-02-06 11:08:16 -08:00
persistent-data dm space map metadata: fix bug in resizing of thin metadata 2014-02-13 13:48:01 -08:00
bitmap.c md: use set_bit_le and clear_bit_le 2013-04-24 11:42:41 +10:00
bitmap.h md/bitmap: record the space available for the bitmap in the superblock. 2012-05-22 13:55:34 +10:00
dm-bio-prison.c dm: add cache target 2013-03-01 22:45:51 +00:00
dm-bio-prison.h dm: add cache target 2013-03-01 22:45:51 +00:00
dm-bio-record.h
dm-bufio.c dm bufio: initialize read-only module parameters 2013-12-20 07:45:10 -08:00
dm-bufio.h dm bufio: prefetch 2012-03-28 18:41:29 +01:00
dm-builtin.c dm sysfs: fix a module unload race 2014-02-13 13:48:02 -08:00
dm-cache-block-types.h dm: add cache target 2013-03-01 22:45:51 +00:00
dm-cache-metadata.c dm cache: replace memcpy with struct assignment 2013-05-10 14:37:18 +01:00
dm-cache-metadata.h dm cache: policy ignore hints if generated by different version 2013-03-20 17:21:28 +00:00
dm-cache-policy-cleaner.c dm cache: policy change version from string to integer set 2013-03-20 17:21:27 +00:00
dm-cache-policy-internal.h dm cache: policy change version from string to integer set 2013-03-20 17:21:27 +00:00
dm-cache-policy-mq.c dm cache: policy change version from string to integer set 2013-03-20 17:21:27 +00:00
dm-cache-policy.c dm cache: policy change version from string to integer set 2013-03-20 17:21:27 +00:00
dm-cache-policy.h dm cache policy: fix description of lookup fn 2013-05-10 14:37:17 +01:00
dm-cache-target.c dm cache: fix access beyond end of origin device 2014-03-23 21:38:18 -07:00
dm-crypt.c block: Convert some code to bio_for_each_segment_all() 2013-03-23 14:26:30 -07:00
dm-delay.c dm delay: fix a possible deadlock due to shared workqueue 2013-12-20 07:45:11 -08:00
dm-exception-store.c dm: replace simple_strtoul 2012-07-27 15:07:59 +01:00
dm-exception-store.h
dm-flakey.c dm: rename request variables to bios 2013-03-01 22:45:47 +00:00
dm-io.c dm kcopyd: add WRITE SAME support to dm_kcopyd_zero 2012-12-21 20:23:37 +00:00
dm-ioctl.c dm ioctl: set noio flag to avoid __vmalloc deadlock 2013-08-04 16:51:02 +08:00
dm-kcopyd.c dm kcopyd: introduce configurable throttling 2013-03-01 22:45:49 +00:00
dm-linear.c dm: rename request variables to bios 2013-03-01 22:45:47 +00:00
dm-log-userspace-base.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
dm-log-userspace-transfer.c connector/userns: replace netlink uses of cap_raised() with capable() 2012-05-10 23:21:39 -04:00
dm-log-userspace-transfer.h
dm-log.c dm: use memweight() 2012-07-30 17:25:16 -07:00
dm-mpath.c dm mpath: fix stalls when handling invalid ioctls 2014-03-06 21:30:13 -08:00
dm-mpath.h
dm-path-selector.c md: Add module.h to all files using it implicitly 2011-10-31 19:31:18 -04:00
dm-path-selector.h
dm-queue-length.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-raid.c dm-raid: silence compiler warning on rebuilds_per_group. 2013-10-05 07:13:11 -07:00
dm-raid1.c block: Use bio_sectors() more consistently 2013-03-23 14:15:30 -07:00
dm-region-hash.c dm raid1: fix crash with mirror recovery and discard 2012-07-20 14:25:03 +01:00
dm-round-robin.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-service-time.c dm: reject trailing characters in sccanf input 2012-03-28 18:41:26 +01:00
dm-snap-persistent.c dm snapshot: fix data corruption 2013-11-04 04:31:06 -08:00
dm-snap-transient.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-snap.c dm snapshot: avoid snapshot space leak on crash 2013-12-20 07:45:10 -08:00
dm-stripe.c dm stripe: fix regression in stripe_width calculation 2013-05-10 14:37:14 +01:00
dm-sysfs.c dm sysfs: fix a module unload race 2014-02-13 13:48:02 -08:00
dm-table.c dm table: fail dm_table_create on dm_round_up overflow 2013-12-20 07:45:11 -08:00
dm-target.c dm: rename request variables to bios 2013-03-01 22:45:47 +00:00
dm-thin-metadata.c dm thin: avoid metadata commit if a pool's thin devices haven't changed 2014-03-06 21:30:13 -08:00
dm-thin-metadata.h dm thin: avoid metadata commit if a pool's thin devices haven't changed 2014-03-06 21:30:13 -08:00
dm-thin.c dm thin: fix the error path for the thin device constructor 2014-03-06 21:30:14 -08:00
dm-uevent.c md: Add in export.h for files using EXPORT_SYMBOL 2011-10-31 19:31:19 -04:00
dm-uevent.h
dm-verity.c dm verity: fix inability to use a few specific devices sizes 2013-08-04 16:51:02 +08:00
dm-zero.c dm: rename request variables to bios 2013-03-01 22:45:47 +00:00
dm.c dm sysfs: fix a module unload race 2014-02-13 13:48:02 -08:00
dm.h dm sysfs: fix a module unload race 2014-02-13 13:48:02 -08:00
faulty.c block: Add bio_end_sector() 2013-03-23 14:15:29 -07:00
Kconfig dm sysfs: fix a module unload race 2014-02-13 13:48:02 -08:00
linear.c block: Add bio_end_sector() 2013-03-23 14:15:29 -07:00
linear.h
Makefile dm sysfs: fix a module unload race 2014-02-13 13:48:02 -08:00
md.c md: fix problem when adding device to read-only array with bitmap. 2014-01-25 08:27:12 -08:00
md.h md: fix problem when adding device to read-only array with bitmap. 2014-01-25 08:27:12 -08:00
multipath.c MD: change the parameter of md thread 2012-10-11 13:34:00 +11:00
multipath.h
raid0.c block: Change bio_split() to respect the current value of bi_idx 2013-03-23 14:15:30 -07:00
raid0.h md: add proper merge_bvec handling to RAID0 and Linear. 2012-03-19 12:46:39 +11:00
raid1.c md/raid1: restore ability for check and repair to fix read errors. 2014-02-22 12:41:29 -08:00
raid1.h md/raid1: prevent merging too large request 2012-07-31 10:03:53 +10:00
raid5.c md/raid5: Fix CPU hotplug callback registration 2014-02-22 12:41:29 -08:00
raid5.h md/raid5: fix interaction of 'replace' and 'recovery'. 2013-08-04 16:50:54 +08:00
raid10.c md/raid10: fix two bugs in handling of known-bad-blocks. 2014-01-25 08:27:12 -08:00
raid10.h MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1) 2013-02-26 11:55:30 +11:00