linux/drivers/md
Mikulas Patocka 35a9af8ddb dm: use noio when sending kobject event
commit 6958c1c640 upstream.

kobject_uevent may allocate memory and it may be called while there are dm
devices suspended. The allocation may recurse into a suspended device,
causing a deadlock. We must set the noio flag when sending a uevent.

The observed deadlock was reported here:
https://www.redhat.com/archives/dm-devel/2020-March/msg00025.html

Reported-by: Khazhismel Kumykov <khazhy@google.com>
Reported-by: Tahsin Erdogan <tahsin@google.com>
Reported-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-16 08:17:27 +02:00
..
bcache bcache: fix potential deadlock problem in btree_gc_coalesce 2020-06-25 15:33:06 +02:00
persistent-data dm space map common: fix to ensure new block isn't already in use 2020-02-11 04:34:03 -08:00
dm-bio-prison-v1.c
dm-bio-prison-v1.h
dm-bio-prison-v2.c
dm-bio-prison-v2.h
dm-bio-record.h dm bio record: save/restore bi_end_io and bi_integrity 2020-03-25 08:06:07 +01:00
dm-bufio.c
dm-builtin.c
dm-cache-background-tracker.c
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c dm cache: fix a crash due to incorrect work item cancelling 2020-03-11 14:15:05 +01:00
dm-core.h
dm-crypt.c dm crypt: avoid truncating the logical block size 2020-06-22 09:05:28 +02:00
dm-delay.c
dm-era-target.c
dm-exception-store.c
dm-exception-store.h
dm-flakey.c dm flakey: Properly corrupt multi-page bios. 2019-12-05 09:20:36 +01:00
dm-integrity.c dm integrity: use dm_bio_record and dm_bio_restore 2020-03-25 08:06:07 +01:00
dm-io.c
dm-ioctl.c
dm-kcopyd.c
dm-linear.c
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c
dm-log.c
dm-mpath.c dm mpath: switch paths in dm_blk_ioctl() code path 2020-06-25 15:32:49 +02:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid.c dm raid: fix false -EBUSY when handling check/repair message 2019-12-05 09:20:37 +01:00
dm-raid1.c
dm-region-hash.c
dm-round-robin.c
dm-rq.c
dm-rq.h
dm-service-time.c
dm-snap-persistent.c block: fix an integer overflow in logical block size 2020-01-23 08:21:29 +01:00
dm-snap-transient.c
dm-snap.c
dm-stats.c
dm-stats.h
dm-stripe.c
dm-switch.c
dm-sysfs.c
dm-table.c
dm-target.c
dm-thin-metadata.c
dm-thin-metadata.h
dm-thin.c
dm-uevent.c
dm-uevent.h
dm-unstripe.c
dm-verity-fec.c dm verity fec: fix hash block number in verity_fec_decode 2020-05-06 08:13:28 +02:00
dm-verity-fec.h
dm-verity-target.c
dm-verity.h
dm-writecache.c dm writecache: add cond_resched to loop in persistent_memory_claim() 2020-06-30 23:17:19 -04:00
dm-zero.c
dm-zoned-metadata.c dm zoned: return NULL if dmz_get_zone_for_reclaim() fails to find a zone 2020-06-25 15:32:58 +02:00
dm-zoned-reclaim.c dm zoned: return NULL if dmz_get_zone_for_reclaim() fails to find a zone 2020-06-25 15:32:58 +02:00
dm-zoned-target.c dm zoned: assign max_io_len correctly 2020-07-09 09:37:12 +02:00
dm-zoned.h dm zoned: reduce overhead of backing device checks 2019-12-17 20:34:53 +01:00
dm.c dm: use noio when sending kobject event 2020-07-16 08:17:27 +02:00
dm.h
Kconfig
Makefile
md-bitmap.c md/bitmap: avoid race window between md_bitmap_resize and bitmap_file_clear_bit 2019-12-31 16:35:25 +01:00
md-bitmap.h
md-cluster.c
md-cluster.h
md-faulty.c
md-linear.c md: improve handling of bio with REQ_PREFLUSH in md_flush_request() 2019-12-17 20:34:55 +01:00
md-linear.h
md-multipath.c md: improve handling of bio with REQ_PREFLUSH in md_flush_request() 2019-12-17 20:34:55 +01:00
md-multipath.h
md.c md: add feature flag MD_FEATURE_RAID0_LAYOUT 2020-06-25 15:33:10 +02:00
md.h md: improve handling of bio with REQ_PREFLUSH in md_flush_request() 2019-12-17 20:34:55 +01:00
raid1-10.c
raid1.c md: raid1: check rdev before reference in raid1_sync_request func 2020-01-09 10:18:57 +01:00
raid1.h
raid5-cache.c
raid5-log.h
raid5-ppl.c
raid5.c raid5: need to set STRIPE_HANDLE for batch head 2019-12-17 20:36:00 +01:00
raid5.h
raid10.c md: improve handling of bio with REQ_PREFLUSH in md_flush_request() 2019-12-17 20:34:55 +01:00
raid10.h
raid0.c md: add feature flag MD_FEATURE_RAID0_LAYOUT 2020-06-25 15:33:10 +02:00
raid0.h