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cdcfd13a66eb53fd96dc480de79c423aa0de9d39
linux/drivers/md
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Zdenek Kabelac 89a459e0d5 md: free unused memory after bitmap resize 
[ Upstream commit 0868b99c21 ]

When bitmap is resized, the old kalloced chunks just are not released
once the resized bitmap starts to use new space.

This fixes in particular kmemleak reports like this one:

unreferenced object 0xffff8f4311e9c000 (size 4096):
  comm "lvm", pid 19333, jiffies 4295263268 (age 528.265s)
  hex dump (first 32 bytes):
    02 80 02 80 02 80 02 80 02 80 02 80 02 80 02 80  ................
    02 80 02 80 02 80 02 80 02 80 02 80 02 80 02 80  ................
  backtrace:
    [<ffffffffa69471ca>] kmemleak_alloc+0x4a/0xa0
    [<ffffffffa628c10e>] kmem_cache_alloc_trace+0x14e/0x2e0
    [<ffffffffa676cfec>] bitmap_checkpage+0x7c/0x110
    [<ffffffffa676d0c5>] bitmap_get_counter+0x45/0xd0
    [<ffffffffa676d6b3>] bitmap_set_memory_bits+0x43/0xe0
    [<ffffffffa676e41c>] bitmap_init_from_disk+0x23c/0x530
    [<ffffffffa676f1ae>] bitmap_load+0xbe/0x160
    [<ffffffffc04c47d3>] raid_preresume+0x203/0x2f0 [dm_raid]
    [<ffffffffa677762f>] dm_table_resume_targets+0x4f/0xe0
    [<ffffffffa6774b52>] dm_resume+0x122/0x140
    [<ffffffffa6779b9f>] dev_suspend+0x18f/0x290
    [<ffffffffa677a3a7>] ctl_ioctl+0x287/0x560
    [<ffffffffa677a693>] dm_ctl_ioctl+0x13/0x20
    [<ffffffffa62d6b46>] do_vfs_ioctl+0xa6/0x750
    [<ffffffffa62d7269>] SyS_ioctl+0x79/0x90
    [<ffffffffa6956d41>] entry_SYSCALL_64_fastpath+0x1f/0xc2

Signed-off-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-17 15:08:00 +01:00
..
bcache
bcache: recover data from backing when data is clean
2017-12-05 11:26:34 +01:00
persistent-data
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bitmap.c
md: free unused memory after bitmap resize
2017-12-17 15:08:00 +01:00
bitmap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dm-bio-prison-v1.c
dm bio prison: use rb_entry() rather than container_of()
2017-06-19 11:03:50 -04:00
dm-bio-prison-v1.h
block: switch bios to blk_status_t
2017-06-09 09:27:32 -06:00
dm-bio-prison-v2.c
dm bio prison: use rb_entry() rather than container_of()
2017-06-19 11:03:50 -04:00
dm-bio-prison-v2.h
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-record.h
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-bufio.c
dm bufio: fix integer overflow when limiting maximum cache size
2017-11-30 08:40:42 +00:00
dm-bufio.h
dm integrity: optimize writing dm-bufio buffers that are partially changed
2017-08-28 11:47:17 -04:00
dm-builtin.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dm-cache-background-tracker.c
dm cache: handle kmalloc failure allocating background_tracker struct
2017-05-17 09:44:53 -04:00
dm-cache-background-tracker.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-block-types.h
linux: drop __bitwise__ everywhere
2016-12-16 00:13:41 +02:00
dm-cache-metadata.c
dm cache metadata: fail operations if fail_io mode has been established
2017-05-05 14:40:13 -04:00
dm-cache-metadata.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-internal.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-smq.c
dm cache policy smq: don't do any writebacks unless IDLE
2017-05-14 21:54:33 -04:00
dm-cache-policy.c
…
dm-cache-policy.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-target.c
dm cache: fix race condition in the writeback mode overwrite_bio optimisation
2017-11-30 08:40:42 +00:00
dm-core.h
dm: allocate struct mapped_device with kvzalloc
2017-11-30 08:40:43 +00:00
dm-crypt.c
dm crypt: allow unaligned bv_offset
2017-11-30 08:40:42 +00:00
dm-delay.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-era-target.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-exception-store.c
Merge tag 'dm-4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2015-11-04 21:19:53 -08:00
dm-exception-store.h
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-flakey.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-integrity.c
dm integrity: allow unaligned bv_offset
2017-11-30 08:40:42 +00:00
dm-io.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-ioctl.c
dm ioctl: fix alignment of event number in the device list
2017-09-25 11:18:29 -04:00
dm-kcopyd.c
dm kcopyd: add sequential write feature
2017-06-19 11:03:51 -04:00
dm-linear.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-log-userspace-base.c
dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()
2015-10-31 19:06:00 -04:00
dm-log-userspace-transfer.c
dm log userspace transfer: match wait_for_completion_timeout return type
2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.h
…
dm-log-writes.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-log.c
block,fs: use REQ_* flags directly
2016-11-01 09:43:26 -06:00
dm-mpath.c
dm mpath: remove annoying message of 'blk_get_request() returned -11'
2017-11-30 08:40:42 +00:00
dm-mpath.h
…
dm-path-selector.c
…
dm-path-selector.h
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-queue-length.c
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-raid1.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-raid.c
dm raid: fix panic when attempting to force a raid to sync
2017-12-17 15:08:00 +01:00
dm-region-hash.c
block: rename bio bi_rw to bi_opf
2016-08-07 14:41:02 -06:00
dm-round-robin.c
dm round robin: revert "use percpu 'repeat_count' and 'current_path'"
2017-02-17 00:54:09 -05:00
dm-rq.c
dm rq: do not update rq partially in each ending bio
2017-08-28 10:23:28 -04:00
dm-rq.h
dm rq: do not update rq partially in each ending bio
2017-08-28 10:23:28 -04:00
dm-service-time.c
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-snap-persistent.c
dm: make flush bios explicitly sync
2017-05-31 10:50:23 -04:00
dm-snap-transient.c
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-snap.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-stats.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dm-stats.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dm-stripe.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-switch.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-sysfs.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-table.c
dm: discard support requires all targets in a table support discards
2017-11-30 08:40:43 +00:00
dm-target.c
dm: don't return errnos from ->map
2017-06-09 09:27:32 -06:00
dm-thin-metadata.c
dm thin metadata: call precommit before saving the roots
2017-05-15 15:09:49 -04:00
dm-thin-metadata.h
dm thin: fix a race condition between discarding and provisioning a block
2016-07-20 12:43:35 -04:00
dm-thin.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-uevent.c
…
dm-uevent.h
…
dm-verity-fec.c
dm verity fec: fix GFP flags used with mempool_alloc()
2017-07-26 15:55:44 -04:00
dm-verity-fec.h
dm verity fec: limit error correction recursion
2017-03-16 09:37:31 -04:00
dm-verity-target.c
Merge tag 'for-4.14/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2017-09-14 13:43:16 -07:00
dm-verity.h
dm verity: switch to using asynchronous hash crypto API
2017-04-24 15:37:04 -04:00
dm-zero.c
dm: don't return errnos from ->map
2017-06-09 09:27:32 -06:00
dm-zoned-metadata.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-zoned-reclaim.c
dm zoned: use GFP_NOIO in I/O path
2017-07-26 15:55:43 -04:00
dm-zoned-target.c
dm zoned: ignore last smaller runt zone
2017-11-30 08:40:42 +00:00
dm-zoned.h
dm zoned: drive-managed zoned block device target
2017-06-19 11:05:20 -04:00
dm.c
dm: fix race between dm_get_from_kobject() and __dm_destroy()
2017-11-30 08:40:43 +00:00
dm.h
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
faulty.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
Kconfig
dm zoned: drive-managed zoned block device target
2017-06-19 11:05:20 -04:00
linear.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
linear.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Makefile
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
md-cluster.c
md-cluster: fix potential lock issue in add_new_disk
2017-05-21 20:37:09 -07:00
md-cluster.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
md.c
md: forbid a RAID5 from having both a bitmap and a journal.
2017-12-05 11:26:38 +01:00
md.h
md: separate request handling
2017-09-27 20:07:40 -07:00
multipath.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
multipath.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid0.c
Merge tag 'md/4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-09-07 12:41:48 -07:00
raid0.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid1-10.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid1.c
raid1: prevent freeze_array/wait_all_barriers deadlock
2017-11-30 08:40:52 +00:00
raid1.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid5-cache.c
md/r5cache: move mddev_lock() out of r5c_journal_mode_set()
2017-12-14 09:52:59 +01:00
raid5-log.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid5-ppl.c
Merge tag 'md/4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-09-07 12:41:48 -07:00
raid5.c
md: forbid a RAID5 from having both a bitmap and a journal.
2017-12-05 11:26:38 +01:00
raid5.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid10.c
Merge tag 'md/4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-09-07 12:41:48 -07:00
raid10.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00