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OpenCloudOS-Kernel
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Zheng Liang 2fc428f6b7 block, bfq: fix UAF problem in bfqg_stats_init() 
In bfq_pd_alloc(), the function bfqg_stats_init() init bfqg. If
blkg_rwstat_init() init bfqg_stats->bytes successful and init
bfqg_stats->ios failed, bfqg_stats_init() return failed, bfqg will
be freed. But blkg_rwstat->cpu_cnt is not deleted from the list of
percpu_counters. If we traverse the list of percpu_counters, It will
have UAF problem.

we should use blkg_rwstat_exit() to cleanup bfqg_stats bytes in the
above scenario.

Fixes: commit fd41e60331 ("bfq-iosched: stop using blkg->stat_bytes and ->stat_ios")
Signed-off-by: Zheng Liang <zhengliang6@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20211018024225.1493938-1-zhengliang6@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 		2021-10-19 15:18:30 -06:00
..
partitions block: convert the rest of block to bdev_get_queue 2021-10-18 06:17:37 -06:00
Kconfig block: move menu "Partition type" to block/partitions/Kconfig 2021-10-18 06:17:35 -06:00
Kconfig.iosched block: simplify Kconfig files 2021-10-18 06:17:35 -06:00
Makefile block: move CONFIG_BLOCK guard to top Makefile 2021-10-18 06:17:35 -06:00
badblocks.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
bdev.c block: use bdev_get_queue() in bdev.c 2021-10-18 06:17:36 -06:00
bfq-cgroup.c block, bfq: fix UAF problem in bfqg_stats_init() 2021-10-19 15:18:30 -06:00
bfq-iosched.c blk-mq: Stop using pointers for blk_mq_tags bitmap tags 2021-10-18 06:17:03 -06:00
bfq-iosched.h block, bfq: cleanup the repeated declaration 2021-08-25 06:45:33 -06:00
bfq-wf2q.c block: Introduce IOPRIO_NR_LEVELS 2021-08-18 07:21:12 -06:00
bio-integrity.c block: convert the rest of block to bdev_get_queue 2021-10-18 06:17:37 -06:00
bio.c block: don't bother iter advancing a fully done bio 2021-10-18 08:50:16 -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 blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT 2019-11-07 12:28:13 -07:00
blk-cgroup.c block: convert the rest of block to bdev_get_queue 2021-10-18 06:17:37 -06:00
blk-core.c block: attempt direct issue of plug list 2021-10-19 09:22:04 -06:00
blk-crypto-fallback.c block: move struct request to blk-mq.h 2021-10-18 06:17:02 -06:00
blk-crypto-internal.h block: move struct request to blk-mq.h 2021-10-18 06:17:02 -06:00
blk-crypto.c block: convert the rest of block to bdev_get_queue 2021-10-18 06:17:37 -06:00
blk-exec.c block: add a struct io_comp_batch argument to fops->iopoll() 2021-10-18 14:40:40 -06:00
blk-flush.c blk-mq: don't handle non-flush requests in blk_insert_flush 2021-10-19 11:10:09 -06:00
blk-integrity.c block: move integrity handling out of <linux/blkdev.h> 2021-10-18 06:17:02 -06:00
blk-ioc.c block: remove retry loop in ioc_release_fn() 2020-07-16 10:22:15 -06:00
blk-iocost.c block: convert the rest of block to bdev_get_queue 2021-10-18 06:17:37 -06:00
blk-iolatency.c mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h> 2021-10-18 06:17:01 -06:00
blk-ioprio.c block: Introduce the ioprio rq-qos policy 2021-06-21 15:03:40 -06:00
blk-ioprio.h block: Introduce the ioprio rq-qos policy 2021-06-21 15:03:40 -06:00
blk-lib.c block: export blk_next_bio() 2021-06-17 15:51:20 +02:00
blk-map.c Merge branch 'akpm' (patches from Andrew) 2021-09-03 10:08:28 -07:00
blk-merge.c block: change plugging to use a singly linked list 2021-10-19 09:21:42 -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 block: remove some blk_mq_hw_ctx debugfs entries 2021-10-18 14:40:33 -06:00
blk-mq-debugfs.h blk-mq: no need to check return value of debugfs_create functions 2019-06-13 03:00:30 -06:00
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: remove debugfs blk_mq_ctx dispatched/merged/completed attributes 2021-10-18 14:39:48 -06:00
blk-mq-sched.h block: store elevator state in request 2021-10-18 08:51:52 -06:00
blk-mq-sysfs.c block: remove blk-mq-sysfs dead code 2021-08-02 13:37:29 -06:00
blk-mq-tag.c block: add support for blk_mq_end_request_batch() 2021-10-18 14:40:43 -06:00
blk-mq-tag.h block: move blk_mq_tag_to_rq() inline 2021-10-19 05:55:41 -06:00
blk-mq-virtio.c blk-mq: Fix typo in comment 2020-03-17 20:55:21 +01:00
blk-mq.c block: inline fast path of driver tag allocation 2021-10-19 15:18:25 -06:00
blk-mq.h block: inline fast path of driver tag allocation 2021-10-19 15:18:25 -06:00
blk-pm.c scsi: block: Fix a race in the runtime power management code 2020-12-09 11:41:41 -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: only mark bio as tracked if it really is tracked 2021-10-18 08:50:47 -06:00
blk-settings.c block: add an explicit ->disk backpointer to the request_queue 2021-08-23 12:54:31 -06:00
blk-stat.c blk-stat: make q->stats->lock irqsafe 2020-09-01 16:48:46 -06:00
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2018-12-12 06:47:51 -07:00
blk-sysfs.c block: don't allow writing to the poll queue attribute 2021-10-18 06:17:36 -06:00
blk-throttle.c block: convert the rest of block to bdev_get_queue 2021-10-18 06:17:37 -06:00
blk-throttle.h block: move blk-throtl fast path inline 2021-10-18 06:17:03 -06:00
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 blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN 2021-08-24 10:12:36 -06:00
blk.h blk-mq: don't handle non-flush requests in blk_insert_flush 2021-10-19 11:10:09 -06:00
bounce.c mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h> 2021-10-18 06:17:01 -06:00
bsg-lib.c scsi: bsg-lib: Fix commands without data transfer in bsg_transport_sg_io_fn() 2021-08-01 13:21:40 -04:00
bsg.c scsi: bsg: Fix device unregistration 2021-09-14 00:22:15 -04:00
disk-events.c block: return errors from disk_alloc_events 2021-08-23 12:55:45 -06:00
elevator.c blk-mq: Change shared sbitmap naming to shared tags 2021-10-18 06:17:03 -06:00
elevator.h block: move elevator.h to block/ 2021-10-18 06:17:01 -06:00
fops.c block: align blkdev_dio inlined bio to a cacheline 2021-10-19 05:55:52 -06:00
genhd.c block: move bdev_read_only() into the header 2021-10-19 05:53:22 -06:00
holder.c block: drop unused includes in <linux/genhd.h> 2021-10-18 06:17:02 -06:00
ioctl.c block: merge block_ioctl into blkdev_ioctl 2021-10-18 06:17:34 -06:00
ioprio.c block: fix default IO priority handling 2021-08-18 07:23:15 -06:00
keyslot-manager.c block: move integrity handling out of <linux/blkdev.h> 2021-10-18 06:17:02 -06:00
kyber-iosched.c blk-mq: Stop using pointers for blk_mq_tags bitmap tags 2021-10-18 06:17:03 -06:00
mq-deadline.c blk-mq: Stop using pointers for blk_mq_tags bitmap tags 2021-10-18 06:17:03 -06:00
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: sed-opal: Change the check condition for regular session validity 2020-03-12 08:00:10 -06:00
t10-pi.c block: move integrity handling out of <linux/blkdev.h> 2021-10-18 06:17:02 -06:00