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Ming Lei 0a9a25ca78 block: let blkcg_gq grab request queue's refcnt 
In the whole lifetime of blkcg_gq instance, ->q will be referred, such
as, ->pd_free_fn() is called in blkg_free, and throtl_pd_free() still
may touch the request queue via &tg->service_queue.pending_timer which
is handled by throtl_pending_timer_fn(), so it is reasonable to grab
request queue's refcnt by blkcg_gq instance.

Previously blkcg_exit_queue() is called from blk_release_queue, and it
is hard to avoid the use-after-free. But recently commit 1059699f87eb ("block:
move blkcg initialization/destroy into disk allocation/release handler")
is merged to for-5.18/block, it becomes simple to fix the issue by simply
grabbing request queue's refcnt.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220318130144.1066064-3-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-03-18 09:57:56 -06:00
..
partitions
block: remove genhd.h
2022-02-02 07:49:59 -07:00
badblocks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
bdev.c
block: remove redundant semicolon
2022-02-27 14:52:36 -07:00
bfq-cgroup.c
block, bfq: don't move oom_bfqq
2022-02-18 06:13:00 -07:00
bfq-iosched.c
block/bfq-iosched: Fix spelling mistake "tenative" -> "tentative"
2022-03-16 06:03:15 -06:00
bfq-iosched.h
block, bfq: cleanup bfq_bfqq_to_bfqg()
2022-02-18 06:13:00 -07:00
bfq-wf2q.c
block, bfq: cleanup bfq_bfqq_to_bfqg()
2022-02-18 06:13:00 -07:00
bio-integrity.c
block: clone crypto and integrity data in __bio_clone_fast
2022-02-04 07:43:18 -07:00
bio.c
block: fix rq-qos breakage from skipping rq_qos_done_bio()
2022-03-14 14:23:13 -06:00
blk-cgroup-rwstat.c
blk-cgroup: Fix the recursive blkg rwstat
2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
blk-cgroup.c
block: let blkcg_gq grab request queue's refcnt
2022-03-18 09:57:56 -06:00
blk-cgroup.h
block: don't merge across cgroup boundaries if blkcg is enabled
2022-03-14 19:14:37 -06:00
blk-core.c
block: move q_usage_counter release into blk_queue_release
2022-03-08 19:40:01 -07:00
blk-crypto-fallback.c
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
blk-crypto-internal.h
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
blk-crypto-profile.c
blk-crypto: remove blk_crypto_unregister()
2021-11-29 06:38:51 -07:00
blk-crypto-sysfs.c
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
blk-crypto.c
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
blk-flush.c
block: pass a block_device and opf to bio_init
2022-02-02 07:49:59 -07:00
blk-ia-ranges.c
block: fix memory leak in disk_register_independent_access_ranges
2022-01-23 09:13:09 -07:00
blk-integrity.c
blk-crypto: remove blk_crypto_unregister()
2021-11-29 06:38:51 -07:00
blk-ioc.c
block: drop needless assignment in set_task_ioprio()
2021-12-23 07:10:07 -07:00
blk-iocost.c
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
blk-iolatency.c
block: fix rq-qos breakage from skipping rq_qos_done_bio()
2022-03-14 14:23:13 -06:00
blk-ioprio.c
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
blk-ioprio.h
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-lib.c
blk-lib: don't check bdev_get_queue() NULL check
2022-02-15 07:51:46 -07:00
blk-map.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
blk-merge.c
block: don't merge across cgroup boundaries if blkcg is enabled
2022-03-14 19:14:37 -06:00
blk-mq-cpumap.c
blk-mq: remove the calling of local_memory_node()
2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c
block: Cleanup license notice
2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c
blk-mq: prepare for implementing hctx table via xarray
2022-03-08 17:57:19 -07:00
blk-mq-debugfs.h
blk-mq: manage hctx map via xarray
2022-03-08 19:39:38 -07:00
blk-mq-pci.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq-rdma.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq-sched.c
block: limit request dispatch loop duration
2022-03-17 20:31:43 -06:00
blk-mq-sched.h
block: move blk_mq_sched_assign_ioc to blk-ioc.c
2021-11-29 06:41:29 -07:00
blk-mq-sysfs.c
blk-mq: prepare for implementing hctx table via xarray
2022-03-08 17:57:19 -07:00
blk-mq-tag.c
blk-mq: manage hctx map via xarray
2022-03-08 19:39:38 -07:00
blk-mq-tag.h
blk-mq: Delete busy_iter_fn
2021-12-06 13:18:47 -07:00
blk-mq-virtio.c
blk-mq: Fix typo in comment
2020-03-17 20:55:21 +01:00
blk-mq.c
block: flush plug based on hardware and software queue order
2022-03-11 11:08:34 -07:00
blk-mq.h
blk-mq: manage hctx map via xarray
2022-03-08 19:39:38 -07:00
blk-pm.c
scsi: block: pm: Always set request queue runtime active in blk_post_runtime_resume()
2021-12-22 23:38:29 -05:00
blk-pm.h
block: Remove unused blk_pm_*() function definitions
2021-02-22 06:33:48 -07:00
blk-rq-qos.c
rq-qos: fix missed wake-ups in rq_qos_throttle try two
2021-06-08 15:12:57 -06:00
blk-rq-qos.h
block: fix rq-qos breakage from skipping rq_qos_done_bio()
2022-03-14 14:23:13 -06:00
blk-settings.c
block: Fix partition check for host-aware zoned block devices
2021-10-27 06:58:01 -06:00
blk-stat.c
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
blk-stat.h
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
blk-sysfs.c
block: move blk_exit_queue into disk_release
2022-03-08 19:40:01 -07:00
blk-throttle.c
block: avoid use-after-free on throttle data
2022-03-18 09:57:56 -06:00
blk-throttle.h
block: revert 4f1e9630afe6 ("blk-throtl: optimize IOPS throttle for large IO scenarios")
2022-02-16 19:42:28 -07:00
blk-timeout.c
block: blk-timeout: delete duplicated word
2020-07-31 16:29:47 -06:00
blk-wbt.c
blk-wbt: prevent NULL pointer dereference in wb_timer_fn
2021-10-19 06:13:41 -06:00
blk-wbt.h
blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
2021-06-21 15:03:41 -06:00
blk-zoned.c
block: pass a block_device and opf to bio_init
2022-02-02 07:49:59 -07:00
blk.h
blk-mq: do not include passthrough requests in I/O accounting
2022-03-08 19:39:52 -07:00
bounce.c
block: partition include/linux/blk-cgroup.h
2022-02-11 10:02:41 -07:00
bsg-lib.c
block: remove the gendisk argument to blk_execute_rq
2021-11-29 06:41:29 -07:00
bsg.c
scsi: bsg: Fix device unregistration
2021-09-14 00:22:15 -04:00
disk-events.c
block: remove genhd.h
2022-02-02 07:49:59 -07:00
elevator.c
block: do more work in elevator_exit
2022-03-08 19:40:01 -07:00
elevator.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
fops.c
block: pass a block_device and opf to bio_init
2022-02-02 07:49:59 -07:00
genhd.c
block: move rq_qos_exit() into disk_release()
2022-03-08 19:40:01 -07:00
holder.c
block: remove genhd.h
2022-02-02 07:49:59 -07:00
ioctl.c
block: merge disk_scan_partitions and blkdev_reread_part
2021-11-29 06:35:21 -07:00
ioprio.c
for-5.17/block-2022-01-11
2022-01-12 10:26:52 -08:00
Kconfig
block: default BLOCK_LEGACY_AUTOLOAD to y
2022-02-27 14:49:23 -07:00
Kconfig.iosched
block: only build the icq tracking code when needed
2021-12-16 10:59:02 -07:00
kyber-iosched.c
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
Makefile
blk-crypto: show crypto capabilities in sysfs
2022-02-28 06:40:23 -07:00
mq-deadline.c
block: fix async_depth sysfs interface for mq-deadline
2022-01-20 10:54:02 -07:00
opal_proto.h
block: sed-opal: Change the check condition for regular session validity
2020-03-12 08:00:10 -06:00
sed-opal.c
block: remove genhd.h
2022-02-02 07:49:59 -07:00
t10-pi.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00