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linux/drivers/md
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Bryn M. Reeves 98dbc9c6c6 dm: fix rq_end_stats() NULL pointer in dm_requeue_original_request() 
An "old" (.request_fn) DM 'struct request' stores a pointer to the
associated 'struct dm_rq_target_io' in rq->special.

dm_requeue_original_request(), previously named
dm_requeue_unmapped_original_request(), called dm_unprep_request() to
reset rq->special to NULL.  But rq_end_stats() would go on to hit a NULL
pointer deference because its call to tio_from_request() returned NULL.

Fix this by calling rq_end_stats() _before_ dm_unprep_request()

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Fixes: e262f34741 ("dm stats: add support for request-based DM devices")
Cc: stable@vger.kernel.org # 4.2+
 		2016-03-14 17:04:34 -04:00
..
bcache Merge branch 'for-4.5/drivers' of git://git.kernel.dk/linux-block 2016-01-21 18:19:38 -08:00
persistent-data dm space map metadata: remove unused variable in brb_pop() 2015-12-14 09:26:01 -05:00
Kconfig dm: add missing newline between DM_DEBUG_BLOCK_STACK_TRACING and DM_BUFIO 2016-03-10 17:12:11 -05:00
Makefile dm cache: make the 'mq' policy an alias for 'smq' 2016-03-10 17:12:08 -05:00
bitmap.c md-cluster: delete useless code 2016-01-24 18:13:37 -08:00
bitmap.h md-cluster: Use a small window for resync 2015-10-12 01:32:05 -05:00
dm-bio-prison.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
dm-bio-prison.h dm bio prison: add dm_cell_promote_or_release() 2015-05-29 14:19:06 -04:00
dm-bio-record.h
…
dm-bufio.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-01-12 17:11:47 -08:00
dm-bufio.h
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dm-builtin.c
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dm-cache-block-types.h
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dm-cache-metadata.c dm cache: make sure every metadata function checks fail_io 2016-03-10 17:12:12 -05:00
dm-cache-metadata.h dm cache: make sure every metadata function checks fail_io 2016-03-10 17:12:12 -05:00
dm-cache-policy-cleaner.c - Revert a dm-multipath change that caused a regression for unprivledged 2015-11-04 21:19:53 -08:00
dm-cache-policy-internal.h dm cache: age and write back cache entries even without active IO 2015-06-11 17:13:01 -04:00
dm-cache-policy-smq.c dm cache policy smq: clarify that mq registration failure was for 'mq' 2016-03-10 17:12:11 -05:00
dm-cache-policy.c
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dm-cache-policy.h dm cache: age and write back cache entries even without active IO 2015-06-11 17:13:01 -04:00
dm-cache-target.c dm cache: bump the target version 2016-03-10 17:12:12 -05:00
dm-crypt.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-delay.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-era-target.c dm persistent data: eliminate unnecessary return values 2015-10-31 19:06:02 -04:00
dm-exception-store.c - Revert a dm-multipath change that caused a regression for unprivledged 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 dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-io.c md: more open-coded offset_in_page() 2016-01-04 10:29:12 -05:00
dm-ioctl.c dm: allow immutable request-based targets to use blk-mq pdu 2016-02-22 22:34:37 -05:00
dm-kcopyd.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
dm-linear.c dm linear: remove redundant target name from error messages 2015-10-31 19:06:03 -04:00
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
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dm-log-userspace-transfer.h
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dm-log-writes.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-log.c
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dm-mpath.c dm mpath: cleanup reinstate_path() et al based on code review 2016-03-10 17:12:04 -05:00
dm-mpath.h
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dm-path-selector.c
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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-raid.c dm raid: fix round up of default region size 2015-10-02 12:02:31 -04:00
dm-raid1.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-region-hash.c dm: convert ffs to __ffs 2015-10-31 19:06:01 -04:00
dm-round-robin.c dm round robin: use percpu 'repeat_count' and 'current_path' 2016-02-22 22:34:42 -05:00
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 snapshot: fix hung bios when copy error occurs 2016-01-08 20:03:05 -05:00
dm-snap-transient.c dm snapshot: fix hung bios when copy error occurs 2016-01-08 20:03:05 -05:00
dm-snap.c dm snapshot: disallow the COW and origin devices from being identical 2016-03-10 17:12:09 -05:00
dm-stats.c dm stats: report precise_timestamps and histogram in @stats_list output 2015-08-18 17:20:03 -04:00
dm-stats.h dm stats: support precise timestamps 2015-06-17 12:40:40 -04:00
dm-stripe.c Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm 2015-09-02 16:35:26 -07:00
dm-switch.c dm switch: simplify conditional in alloc_region_table() 2015-10-31 19:06:06 -04:00
dm-sysfs.c
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dm-table.c dm snapshot: disallow the COW and origin devices from being identical 2016-03-10 17:12:09 -05:00
dm-target.c dm: set DM_TARGET_WILDCARD feature on "error" target 2016-02-22 11:06:21 -05:00
dm-thin-metadata.c dm thin metadata: don't issue prefetches if a transaction abort has failed 2016-03-10 17:12:09 -05:00
dm-thin-metadata.h dm thin metadata: add dm_thin_remove_range() 2015-06-11 17:13:04 -04:00
dm-thin.c dm thin: consistently return -ENOSPC if pool has run out of data space 2016-03-11 16:15:22 -05:00
dm-uevent.c
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dm-uevent.h
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dm-verity-fec.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-verity-fec.h dm verity: add support for forward error correction 2015-12-10 10:39:03 -05:00
dm-verity-target.c dm: rename target's per_bio_data_size to per_io_data_size 2016-02-22 22:34:37 -05:00
dm-verity.h dm verity: add ignore_zero_blocks feature 2015-12-10 10:39:03 -05:00
dm-zero.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
dm.c dm: fix rq_end_stats() NULL pointer in dm_requeue_original_request() 2016-03-14 17:04:34 -04:00
dm.h dm: allow immutable request-based targets to use blk-mq pdu 2016-02-22 22:34:37 -05:00
faulty.c MD: rename some functions 2016-01-20 13:52:20 -08:00
linear.c block: kill merge_bvec_fn() completely 2015-08-13 12:31:57 -06:00
linear.h
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md-cluster.c md-cluster: fix missing memory free 2016-01-24 18:13:18 -08:00
md-cluster.h md-cluster: append some actions when change bitmap from clustered to none 2016-01-06 11:38:57 +11:00
md.c md updates for 4.5 2016-01-15 12:28:00 -08:00
md.h md updates for 4.5 2016-01-15 12:28:00 -08:00
multipath.c md/raid: only permit hot-add of compatible integrity profiles 2016-01-14 11:49:57 +11:00
multipath.h
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raid0.c treewide: Fix typos in printk 2015-12-08 14:59:19 +01:00
raid0.h block: kill merge_bvec_fn() completely 2015-08-13 12:31:57 -06:00
raid1.c MD: rename some functions 2016-01-20 13:52:20 -08:00
raid1.h md-cluster: Use a small window for resync 2015-10-12 01:32:05 -05:00
raid5-cache.c raid5-cache: handle journal hotadd in quiesce 2016-01-14 11:49:43 +11:00
raid5.c MD: rename some functions 2016-01-20 13:52:20 -08:00
raid5.h raid5-cache: IO error handling 2015-11-01 13:48:29 +11:00
raid10.c MD: rename some functions 2016-01-20 13:52:20 -08:00
raid10.h md/raid10: ensure device failure recorded before write request returns. 2015-08-31 19:43:45 +02:00