Yu Kuai f1c006f1c6 blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy() ... Currently parent pd can be freed before child pd: t1: remove cgroup C1 blkcg_destroy_blkgs blkg_destroy list_del_init(&blkg->q_node) // remove blkg from queue list percpu_ref_kill(&blkg->refcnt) blkg_release call_rcu t2: from t1 __blkg_release blkg_free schedule_work t4: deactivate policy blkcg_deactivate_policy pd_free_fn // parent of C1 is freed first t3: from t2 blkg_free_workfn pd_free_fn If policy(for example, ioc_timer_fn() from iocost) access parent pd from child pd after pd_offline_fn(), then UAF can be triggered. Fix the problem by delaying 'list_del_init(&blkg->q_node)' from blkg_destroy() to blkg_free_workfn(), and using a new disk level mutex to synchronize blkg_free_workfn() and blkcg_deactivate_policy(). Signed-off-by: Yu Kuai <yukuai3@huawei.com> Acked-by: Tejun Heo <tj@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230119110350.2287325-4-yukuai1@huaweicloud.com Signed-off-by: Jens Axboe <axboe@kernel.dk>		2023-01-29 15:19:04 -07:00
..
partitions	block: don't add partitions if GD_SUPPRESS_PART_SCAN is set	2022-09-03 11:29:03 -06:00
badblocks.c	block/badblocks: Remove redundant assignments	2022-04-23 07:15:26 -06:00
bdev.c	block: bdev & blktrace: use consistent function doc. notation	2022-12-01 09:16:46 -07:00
bfq-cgroup.c	block, bfq: inject I/O to underutilized actuators	2023-01-29 15:18:33 -07:00
bfq-iosched.c	block, bfq: balance I/O injection among underutilized actuators	2023-01-29 15:18:33 -07:00
bfq-iosched.h	block, bfq: inject I/O to underutilized actuators	2023-01-29 15:18:33 -07:00
bfq-wf2q.c	block, bfq: inject I/O to underutilized actuators	2023-01-29 15:18:33 -07:00
bio-integrity.c	block: pass struct queue_limits to the bio splitting helpers	2022-08-02 21:08:53 -06:00
bio.c	block: add a BUILD_BUG_ON() for adding more bio flags than we have space	2023-01-29 15:18:33 -07:00
blk-cgroup-fc-appid.c	cgroup: Homogenize cgroup_get_from_id() return value	2022-08-26 10:57:41 -10:00
blk-cgroup-rwstat.c
blk-cgroup-rwstat.h	block: Use the new blk_opf_t type	2022-07-14 12:14:30 -06:00
blk-cgroup.c	blk-cgroup: synchronize pd_free_fn() from blkg_free_workfn() and blkcg_deactivate_policy()	2023-01-29 15:19:04 -07:00
blk-cgroup.h	blk-cgroup: support to track if policy is online	2023-01-29 15:19:04 -07:00
blk-core.c	block: treat poll queue enter similarly to timeouts	2023-01-29 15:18:34 -07:00
blk-crypto-fallback.c	treewide: use get_random_bytes() when possible	2022-10-11 17:42:58 -06:00
blk-crypto-internal.h	blk-crypto: pass a gendisk to blk_crypto_sysfs_{,un}register	2022-11-30 11:09:00 -07:00
blk-crypto-profile.c	blk-crypto: Add a missing include directive	2022-11-23 10:38:54 -07:00
blk-crypto-sysfs.c	block: untangle request_queue refcounting from sysfs	2022-11-30 11:09:00 -07:00
blk-crypto.c	for-6.2/block-2022-12-08	2022-12-13 10:43:59 -08:00
blk-flush.c	block: change request end_io handler to pass back a return value	2022-09-30 07:49:09 -06:00
blk-ia-ranges.c	block: untangle request_queue refcounting from sysfs	2022-11-30 11:09:00 -07:00
blk-integrity.c
blk-ioc.c	block: fix default IO priority handling again	2022-06-27 06:29:12 -06:00
blk-iocost.c	blk-iocost: change div64_u64 to DIV64_U64_ROUND_UP in ioc_refresh_params()	2023-01-29 15:18:34 -07:00
blk-iolatency.c	treewide: Convert del_timer*() to timer_shutdown*()	2022-12-25 13:38:09 -08:00
blk-ioprio.c	blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit	2022-09-26 19:09:31 -06:00
blk-ioprio.h	blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit	2022-09-26 19:09:31 -06:00
blk-lib.c	blk-lib: fix blkdev_issue_secure_erase	2022-09-15 00:25:17 -06:00
blk-map.c	block: extend bio-cache for non-polled requests	2023-01-29 15:18:34 -07:00
blk-merge.c	block: don't allow splitting of a REQ_NOWAIT bio	2023-01-04 13:24:44 -07:00
blk-mq-cpumap.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq-debugfs-zoned.c	block: move zone related fields to struct gendisk	2022-07-06 06:46:26 -06:00
blk-mq-debugfs.c	for-6.1/block-2022-10-03	2022-10-07 09:19:14 -07:00
blk-mq-debugfs.h	block: remove per-disk debugfs files in blk_unregister_queue	2022-06-17 07:31:05 -06:00
blk-mq-pci.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq-rdma.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq-sched.c	block: split elevator_switch	2022-11-01 09:12:24 -06:00
blk-mq-sched.h
blk-mq-sysfs.c	blk-mq: cleanup unused methods: blk_mq_hw_sysfs_store	2023-01-29 15:18:35 -07:00
blk-mq-tag.c	sbitmap: fix batched wait_cnt accounting	2022-09-12 00:10:34 -06:00
blk-mq-tag.h	blk-mq: blk_mq_tag_busy is no need to return a value	2022-06-27 06:29:12 -06:00
blk-mq-virtio.c	block: Change the return type of blk_mq_map_queues() into void	2022-08-22 10:07:53 -06:00
blk-mq.c	block: fix hctx checks for batch allocation	2023-01-17 09:56:52 -07:00
blk-mq.h	blk-mq: move the srcu_struct used for quiescing to the tagset	2022-11-02 08:35:34 -06:00
blk-pm.c
blk-pm.h
blk-rq-qos.c	block/rq_qos: Use atomic_try_cmpxchg in atomic_inc_below	2022-07-12 14:38:52 -06:00
blk-rq-qos.h	block/blk-rq-qos: delete useless enmu RQ_QOS_IOPRIO	2022-09-21 19:50:53 -06:00
blk-settings.c	block: save user max_sectors limit	2023-01-29 15:18:33 -07:00
blk-stat.c
blk-stat.h
blk-sysfs.c	block: save user max_sectors limit	2023-01-29 15:18:33 -07:00
blk-throttle.c	blk-throttle: Use more suitable time_after check for update of slice_start	2022-12-05 13:45:31 -07:00
blk-throttle.h	blk-throttle: pass a gendisk to blk_throtl_cancel_bios	2022-09-26 19:17:28 -06:00
blk-timeout.c
blk-wbt.c	blk-wbt: don't enable throttling if default elevator is bfq	2022-10-23 18:59:17 -06:00
blk-wbt.h	blk-wbt: don't show valid wbt_lat_usec in sysfs while wbt is disabled	2022-10-23 18:59:17 -06:00
blk-zoned.c	block: add a new helper bdev_{is_zone_start, offset_from_zone_start}	2023-01-29 15:18:34 -07:00
blk.h	for-6.2/block-2022-12-08	2022-12-13 10:43:59 -08:00
bounce.c	block: change the blk_queue_bounce calling convention	2022-08-02 17:22:54 -06:00
bsg-lib.c	blk-mq: move the call to blk_put_queue out of blk_mq_destroy_queue	2022-10-25 08:25:10 -06:00
bsg.c	Driver Core changes for 6.2-rc1	2022-12-16 03:54:54 -08:00
disk-events.c
elevator.c	block: untangle request_queue refcounting from sysfs	2022-11-30 11:09:00 -07:00
elevator.h	block: add proper helpers for elevator_type module refcount management	2022-10-23 18:59:17 -06:00
fops.c	block: don't allow multiple bios for IOCB_NOWAIT issue	2023-01-29 15:18:34 -07:00
genhd.c	block-2023-01-06	2023-01-06 13:12:42 -08:00
holder.c	block: don't allow a disk link holder to itself	2022-11-16 15:19:56 -07:00
ioctl.c	block: Do not reread partition table on exclusively open device	2022-12-01 07:44:03 -07:00
ioprio.c	block: Fix handling of tasks without ioprio in ioprio_get(2)	2022-06-27 06:29:12 -06:00
Kconfig	block: Remove "select SRCU"	2023-01-05 08:50:10 -07:00
Kconfig.iosched
kyber-iosched.c	treewide: Convert del_timer*() to timer_shutdown*()	2022-12-25 13:38:09 -08:00
Makefile	blk-cgroup: move blkcg_{get,set}_fc_appid out of line	2022-05-02 14:06:20 -06:00
mq-deadline.c	block: mq-deadline: Rename deadline_is_seq_writes()	2022-11-28 19:27:45 -07:00
opal_proto.h	block: sed-opal: Add ioctl to return device status	2022-08-22 07:52:51 -06:00
sed-opal.c	for-6.2/block-2022-12-08	2022-12-13 10:43:59 -08:00
t10-pi.c