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4eeb6535cd51100460ec8873bb68addef17b3e81
linux/drivers/md
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Yu Kuai 4eeb6535cd md/bitmap: factor out a helper to set timeout 
Register/unregister 'mddev->thread' are both under 'reconfig_mutex',
however, some context didn't hold the mutex to access mddev->thread,
which can cause null-ptr-deference:

1) md_bitmap_daemon_work() can be called from md_check_recovery() where
'reconfig_mutex' is not held, deference 'mddev->thread' might cause
null-ptr-deference, because md_unregister_thread() reset the pointer
before stopping the thread.

2) timeout_store() access 'mddev->thread' multiple times,
null-ptr-deference can be triggered if 'mddev->thread' is reset in the
middle.

This patch factor out a helper to set timeout, the new helper always
check if 'mddev->thread' is null first, so that problem 1 can be fixed.

Now that this helper only access 'mddev->thread' once, but it's possible
that 'mddev->thread' can be freed while this helper is still in progress,
hence the problem is not fixed yet. Follow up patches will fix this by
protecting md_thread with rcu.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230523021017.3048783-5-yukuai1@huaweicloud.com
2023-06-13 15:25:13 -07:00
..
bcache
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
persistent-data
dm: add missing blank line after declarations/fix those
2023-02-14 14:23:07 -05:00
dm-audit.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-audit.h
dm: introduce audit event module for device mapper
2021-10-27 16:53:47 -04:00
dm-bio-prison-v1.c
dm: improve hash_locks sizing and hash function
2023-03-30 15:57:51 -04:00
dm-bio-prison-v1.h
dm bio prison v1: add dm_cell_key_has_valid_range
2023-03-30 15:57:51 -04:00
dm-bio-prison-v2.c
dm: address space issues relative to switch/while/for/...
2023-02-14 14:23:06 -05:00
dm-bio-prison-v2.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-bio-record.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-bufio.c
Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-04-27 19:42:02 -07:00
dm-builtin.c
dm: adjust EXPORT_SYMBOL() to follow functions immediately
2023-02-14 14:23:07 -05:00
dm-cache-background-tracker.c
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-background-tracker.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-block-types.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-cache-metadata.c
mm: shrinkers: convert shrinker_rwsem to mutex
2023-03-28 16:20:17 -07:00
dm-cache-metadata.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-policy-internal.h
dm: add missing empty lines
2023-02-14 14:23:06 -05:00
dm-cache-policy-smq.c
dm: add missing empty lines
2023-02-14 14:23:06 -05:00
dm-cache-policy.c
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-cache-policy.h
dm: address indent/space issues
2023-02-14 14:23:06 -05:00
dm-cache-target.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-clone-metadata.c
dm clone metadata: remove unused function
2021-04-19 13:20:31 -04:00
dm-clone-metadata.h
dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions()
2020-03-27 14:42:51 -04:00
dm-clone-target.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-core.h
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-crypt.c
dm-crypt: use __bio_add_page to add single page to clone bio
2023-06-01 09:13:31 -06:00
dm-delay.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-dust.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-ebs-target.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-era-target.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-exception-store.c
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-exception-store.h
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-flakey.c
dm flakey: add an "error_reads" option
2023-04-19 11:13:43 -04:00
dm-ima.c
dm: avoid inline filenames
2023-02-14 14:23:07 -05:00
dm-ima.h
dm: avoid inline filenames
2023-02-14 14:23:07 -05:00
dm-init.c
dm: open code dm_get_dev_t in dm_init_init
2023-06-05 10:57:40 -06:00
dm-integrity.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-io-rewind.c
dm: avoid void function return statements
2023-02-14 14:23:07 -05:00
dm-io-tracker.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-io.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-ioctl.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-kcopyd.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-linear.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-log-userspace-base.c
dm: avoid void function return statements
2023-02-14 14:23:07 -05:00
dm-log-userspace-transfer.c
dm: avoid split of quoted strings where possible
2023-02-14 14:23:07 -05:00
dm-log-userspace-transfer.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-log-writes.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-log.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-mpath.c
dm: push error reporting down to dm_register_target()
2023-04-11 12:01:01 -04:00
dm-mpath.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-path-selector.c
dm: adjust EXPORT_SYMBOL() to follow functions immediately
2023-02-14 14:23:07 -05:00
dm-path-selector.h
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-ps-historical-service-time.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-ps-io-affinity.c
dm: address space issues relative to switch/while/for/...
2023-02-14 14:23:06 -05:00
dm-ps-queue-length.c
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-ps-round-robin.c
dm: correct block comments format.
2023-02-14 14:23:06 -05:00
dm-ps-service-time.c
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-raid1.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-raid.c
dm-raid: remove useless checking in raid_message()
2023-06-13 15:25:13 -07:00
dm-region-hash.c
dm: correct block comments format.
2023-02-14 14:23:06 -05:00
dm-rq.c
dm: avoid using symbolic permissions
2023-02-14 14:23:07 -05:00
dm-rq.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-snap-persistent.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-snap-transient.c
dm: avoid split of quoted strings where possible
2023-02-14 14:23:07 -05:00
dm-snap.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-stats.c
dm stats: check for and propagate alloc_percpu failure
2023-03-16 13:37:06 -04:00
dm-stats.h
dm stats: check for and propagate alloc_percpu failure
2023-03-16 13:37:06 -04:00
dm-stripe.c
dm: remove unnecessary (void*) conversions
2023-04-11 12:01:01 -04:00
dm-switch.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-sysfs.c
dm sysfs: make kobj_type structure constant
2023-02-14 14:23:08 -05:00
dm-table.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-target.c
dm: push error reporting down to dm_register_target()
2023-04-11 12:01:01 -04:00
dm-thin-metadata.c
mm: shrinkers: convert shrinker_rwsem to mutex
2023-03-28 16:20:17 -07:00
dm-thin-metadata.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-thin.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-uevent.c
dm: avoid spaces before function arguments or in favour of tabs
2023-02-14 14:23:06 -05:00
dm-uevent.h
dm: fix undue/missing spaces
2023-02-14 14:23:06 -05:00
dm-unstripe.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-verity-fec.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-verity-fec.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-verity-loadpin.c
dm: verity-loadpin: Only trust verity targets with enforcement
2022-09-07 16:37:27 -07:00
dm-verity-target.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm-verity-verify-sig.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-verity-verify-sig.h
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-verity.h
dm: change "unsigned" to "unsigned int"
2023-02-14 14:23:06 -05:00
dm-writecache.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-zero.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-zone.c
dm: add missing SPDX-License-Indentifiers
2023-02-14 14:23:06 -05:00
dm-zoned-metadata.c
dm: dm-zoned: use __bio_add_page for adding single metadata page
2023-05-31 09:50:02 -06:00
dm-zoned-reclaim.c
dm kcopyd: avoid useless atomic operations
2021-06-04 12:07:24 -04:00
dm-zoned-target.c
dm: add helper macro for simple DM target module init and exit
2023-04-11 12:09:08 -04:00
dm-zoned.h
dm/dm-zoned: Use the enum req_op type
2022-07-14 12:14:31 -06:00
dm.c
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
dm.h
block: replace fmode_t with a block-specific type for block open flags
2023-06-12 08:04:05 -06:00
Kconfig
Merge branch 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-6.3
2023-03-15 12:18:07 -06:00
Makefile
Merge tag 'hardening-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2022-08-02 14:38:59 -07:00
md-autodetect.c
init: improve the name_to_dev_t interface
2023-06-05 10:56:46 -06:00
md-bitmap.c
md/bitmap: factor out a helper to set timeout
2023-06-13 15:25:13 -07:00
md-bitmap.h
md: Avoid namespace collision with bitmap API
2018-08-01 15:49:39 -07:00
md-cluster.c
fs: dlm: remove DLM_LSFL_FS from uapi
2022-08-23 14:54:54 -05:00
md-cluster.h
md-cluster: introduce resync_info_get interface for sanity check
2018-10-18 09:36:35 -07:00
md-faulty.c
block: pass a block_device to bio_clone_fast
2022-02-04 07:43:18 -07:00
md-linear.c
md: add error_handlers for raid0 and linear
2023-04-13 22:20:24 -07:00
md-linear.h
md/raid1: Replace zero-length array with flexible-array
2020-05-13 12:02:23 -07:00
md-multipath.c
md: remove most calls to bdevname
2022-05-22 23:07:21 -07:00
md-multipath.h
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
md.c
md: factor out a helper to wake up md_thread directly
2023-06-13 15:25:11 -07:00
md.h
md: fix duplicate filename for rdev
2023-06-13 15:24:14 -07:00
raid0.c
md: add error_handlers for raid0 and linear
2023-04-13 22:20:24 -07:00
raid0.h
md/raid0: avoid RAID0 data corruption due to layout confusion.
2019-09-13 13:10:05 -07:00
raid1-10.c
md: raid1: check if adding pages to resync bio fails
2023-06-01 09:13:31 -06:00
raid1.c
md: raid1: use __bio_add_page for adding single page to bio
2023-06-01 09:13:31 -06:00
raid1.h
md: raid1/raid10: drop pending_cnt
2022-03-08 15:16:54 -08:00
raid5-cache.c
md: raid5-log: use __bio_add_page to add single page
2023-05-31 09:50:02 -06:00
raid5-log.h
md/raid5-ppl: Drop unused argument from ppl_handle_flush_request()
2022-08-02 17:14:31 -06:00
raid5-ppl.c
md: raid5: use __bio_add_page to add single page to new bio
2023-05-31 09:50:02 -06:00
raid5.c
md/raid5: fix a deadlock in the case that reshape is interrupted
2023-06-13 15:13:21 -07:00
raid5.h
md/raid5: Cleanup prototype of raid5_get_active_stripe()
2022-09-22 00:05:04 -07:00
raid10.c
md: raid1: check if adding pages to resync bio fails
2023-06-01 09:13:31 -06:00
raid10.h
md/raid10: convert resync_lock to use seqlock
2022-09-22 00:05:05 -07:00