Christoph Hellwig 7df835a32a md: fix a lock order reversal in md_alloc ... Commit b0140891a8 ("md: Fix race when creating a new md device.") not only moved assigning mddev->gendisk before calling add_disk, which fixes the races described in the commit log, but also added a mddev->open_mutex critical section over add_disk and creation of the md kobj. Adding a kobject after add_disk is racy vs deleting the gendisk right after adding it, but md already prevents against that by holding a mddev->active reference. On the other hand taking this lock added a lock order reversal with what is not disk->open_mutex (used to be bdev->bd_mutex when the commit was added) for partition devices, which need that lock for the internal open for the partition scan, and a recent commit also takes it for non-partitioned devices, leading to further lockdep splatter. Fixes: b0140891a8 ("md: Fix race when creating a new md device.") Fixes: d626338735 ("block: support delayed holder registration") Reported-by: syzbot+fadc0aaf497e6a493b9f@syzkaller.appspotmail.com Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: syzbot+fadc0aaf497e6a493b9f@syzkaller.appspotmail.com Reviewed-by: NeilBrown <neilb@suse.de> Signed-off-by: Song Liu <songliubraving@fb.com>		2021-09-22 08:45:58 -07:00
..
bcache	bcache: use bvec_virt	2021-08-16 10:50:33 -06:00
persistent-data	dm btree remove: assign new_root only when removal succeeds	2021-06-25 15:25:24 -04:00
Kconfig	dm: make EBS depend on !HIGHMEM	2021-08-16 10:50:32 -06:00
Makefile	dm ima: measure data on table load	2021-08-10 13:32:40 -04:00
dm-bio-prison-v1.c	…
dm-bio-prison-v1.h	…
dm-bio-prison-v2.c	…
dm-bio-prison-v2.h	…
dm-bio-record.h	block: store a block_device pointer in struct bio	2021-01-24 18:17:20 -07:00
dm-bufio.c	dm bufio: subtract the number of initial sectors in dm_bufio_get_device_size	2021-03-04 14:53:54 -05:00
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: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-clone-metadata.c	dm clone metadata: remove unused function	2021-04-19 13:20:31 -04:00
dm-clone-metadata.h	…
dm-clone-target.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-core.h	dm ima: measure data on table load	2021-08-10 13:32:40 -04:00
dm-crypt.c	dm crypt: use in_hardirq() instead of deprecated in_irq()	2021-08-20 16:25:07 -04:00
dm-delay.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-dust.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-ebs-target.c	- Add DM infrastructure for IMA-based remote attestion. These changes	2021-08-31 14:55:09 -07:00
dm-era-target.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-exception-store.c	…
dm-exception-store.h	…
dm-flakey.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-ima.c	integrity-v5.15	2021-09-02 12:51:41 -07:00
dm-ima.h	dm ima: add version info to dm related events in ima log	2021-08-20 15:59:47 -04:00
dm-init.c	…
dm-integrity.c	- Add DM infrastructure for IMA-based remote attestion. These changes	2021-08-31 14:55:09 -07:00
dm-io-tracker.h	dm writecache: make writeback pause configurable	2021-06-28 16:30:13 -04:00
dm-io.c	block: Add bio_max_segs	2021-02-26 15:49:51 -07:00
dm-ioctl.c	dm ima: measure data on device rename	2021-08-10 13:34:23 -04:00
dm-kcopyd.c	dm writecache: have ssd writeback wait if the kcopyd workqueue is busy	2021-06-15 15:42:03 -04:00
dm-linear.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-log-userspace-base.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-log-userspace-transfer.c	…
dm-log-userspace-transfer.h	…
dm-log-writes.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-log.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-mpath.c	dm ima: update dm target attributes for ima measurements	2021-08-20 16:07:36 -04:00
dm-mpath.h	…
dm-path-selector.c	…
dm-path-selector.h	…
dm-ps-historical-service-time.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-ps-io-affinity.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-ps-queue-length.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-ps-round-robin.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-ps-service-time.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-raid.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-raid1.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-region-hash.c	…
dm-rq.c	dm: delay registering the gendisk	2021-08-09 11:50:43 -06:00
dm-rq.h	…
dm-snap-persistent.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-snap-transient.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-snap.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-stats.c	…
dm-stats.h	…
dm-stripe.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-switch.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-sysfs.c	…
dm-table.c	libnvdimm for v5.15	2021-09-09 11:39:57 -07:00
dm-target.c	…
dm-thin-metadata.c	dm space maps: improve performance with inc/dec on ranges of blocks	2021-06-04 12:07:22 -04:00
dm-thin-metadata.h	…
dm-thin.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-uevent.c	…
dm-uevent.h	…
dm-unstripe.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-verity-fec.c	dm verity fec: fix misaligned RS roots IO	2021-04-14 14:28:29 -04:00
dm-verity-fec.h	dm verity fec: fix misaligned RS roots IO	2021-04-14 14:28:29 -04:00
dm-verity-target.c	dm ima: update dm target attributes for ima measurements	2021-08-20 16:07:36 -04:00
dm-verity-verify-sig.c	dm verity: fix require_signatures module_param permissions	2021-05-25 16:14:05 -04:00
dm-verity-verify-sig.h	…
dm-verity.h	…
dm-writecache.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-zero.c	…
dm-zone.c	dm zone: fix dm_revalidate_zones() memory allocation	2021-06-25 15:25:23 -04:00
dm-zoned-metadata.c	dm zoned: check zone capacity	2021-06-04 12:07:28 -04:00
dm-zoned-reclaim.c	dm kcopyd: avoid useless atomic operations	2021-06-04 12:07:24 -04:00
dm-zoned-target.c	dm: update target status functions to support IMA measurement	2021-08-10 13:34:23 -04:00
dm-zoned.h	…
dm.c	libnvdimm for v5.15	2021-09-09 11:39:57 -07:00
dm.h	dm: introduce zone append emulation	2021-06-04 12:07:37 -04:00
md-autodetect.c	…
md-bitmap.c	md: Constify attribute_group structs	2021-06-14 22:32:07 -07:00
md-bitmap.h	…
md-cluster.c	…
md-cluster.h	…
md-faulty.c	md: mark some personalities as deprecated	2021-06-14 22:32:07 -07:00
md-linear.c	md: mark some personalities as deprecated	2021-06-14 22:32:07 -07:00
md-linear.h	…
md-multipath.c	md: mark some personalities as deprecated	2021-06-14 22:32:07 -07:00
md-multipath.h	…
md.c	md: fix a lock order reversal in md_alloc	2021-09-22 08:45:58 -07:00
md.h	block: remove GENHD_FL_UP	2021-08-12 10:29:36 -06:00
raid0.c	md: add io accounting for raid0 and raid5	2021-06-14 22:32:06 -07:00
raid0.h	…
raid1-10.c	…
raid1.c	for-5.15/drivers-2021-08-30	2021-08-30 19:01:46 -07:00
raid1.h	md/raid1: enable io accounting	2021-06-14 22:32:07 -07:00
raid5-cache.c	block: rename BIO_MAX_PAGES to BIO_MAX_VECS	2021-03-11 07:47:48 -07:00
raid5-log.h	…
raid5-ppl.c	block: rename BIO_MAX_PAGES to BIO_MAX_VECS	2021-03-11 07:47:48 -07:00
raid5.c	md/raid5: Replace deprecated CPU-hotplug functions.	2021-08-28 01:46:17 +02:00
raid5.h	…
raid10.c	for-5.15/drivers-2021-08-30	2021-08-30 19:01:46 -07:00
raid10.h	md/raid10: enable io accounting	2021-06-14 22:32:07 -07:00