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Davidlohr Bueso 727858a98a block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2) 
commit e6a59aac8a8713f335a37d762db0dbe80e7f6d38 upstream.

do_each_pid_thread(PIDTYPE_PGID) can race with a concurrent
change_pid(PIDTYPE_PGID) that can move the task from one hlist
to another while iterating. Serialize ioprio_get to take
the tasklist_lock in this case, just like it's set counterpart.

Fixes: d69b78ba1de (ioprio: grab rcu_read_lock in sys_ioprio_{set,get}())
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://lore.kernel.org/r/20211210182058.43417-1-dave@stgolabs.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 14:49:02 +01:00
..
partitions
docs: admin-guide: add a series of orphaned documents
2019-07-15 11:03:02 -03:00
badblocks.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -06:00
bfq-cgroup.c
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
bfq-iosched.c
Revert "block, bfq: honor already-setup queue merges"
2021-10-06 15:42:34 +02:00
bfq-iosched.h
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
bfq-wf2q.c
bfq: fix blkio cgroup leakage v4
2020-09-03 11:26:54 +02:00
bio-integrity.c
block: release bip in a right way in error path
2020-07-16 08:16:36 +02:00
bio.c
block: only update parent bi_status when bio fail
2021-04-16 11:46:38 +02:00
blk-cgroup.c
blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
2021-09-30 10:09:25 +02:00
blk-core.c
Revert "Revert "block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT""
2021-02-07 15:35:47 +01:00
blk-exec.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -06:00
blk-flush.c
blk-mq: insert passthrough request into hctx->dispatch directly
2020-03-21 08:11:52 +01:00
blk-integrity.c
block: centralize PI remapping logic to the block layer
2019-09-17 20:03:49 -06:00
blk-ioc.c
block: Fix use-after-free issue accessing struct io_cq
2020-04-17 10:50:04 +02:00
blk-iocost.c
blk-iocost: ioc_pd_free() shouldn't assume irq disabled
2020-09-09 19:12:35 +02:00
blk-iolatency.c
blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit()
2021-08-12 13:20:58 +02:00
blk-lib.c
block: fix 32 bit overflow in __blkdev_issue_discard()
2018-11-14 08:17:18 -07:00
blk-map.c
block: fix memleak when __blk_rq_map_user_iov() is failed
2020-01-12 12:21:43 +01:00
blk-merge.c
block: fix discard request merge
2021-07-14 16:53:19 +02:00
blk-mq-cpumap.c
blk-mq: balance mapping between present CPUs and queues
2019-08-04 21:43:12 -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-debugfs: update blk_queue_flag_name[] accordingly for new flags
2020-07-22 09:32:52 +02:00
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
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
blk-mq-sched.h
block: only call sched requeue_request() for scheduled requests
2020-09-23 12:40:37 +02:00
blk-mq-sysfs.c
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-29 09:57:34 +01:00
blk-mq-tag.c
blk-mq: introduce blk_mq_tagset_wait_completed_request()
2019-08-04 21:41:29 -06:00
blk-mq-tag.h
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
blk-mq-virtio.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq.c
block: remove inaccurate requeue check
2021-11-17 09:48:31 +01:00
blk-mq.h
blk-mq: insert passthrough request into hctx->dispatch directly
2020-03-21 08:11:52 +01:00
blk-pm.c
scsi: block: Fix a race in the runtime power management code
2021-01-06 14:48:37 +01:00
blk-pm.h
block: remove the queue_lock indirection
2018-11-15 12:17:28 -07:00
blk-rq-qos.c
rq-qos: fix missed wake-ups in rq_qos_throttle try two
2021-07-19 08:53:16 +02:00
blk-rq-qos.h
block: fix race between adding/removing rq qos and normal IO
2021-07-14 16:53:18 +02:00
blk-settings.c
blk-settings: align max_sectors on "logical_block_size" boundary
2021-03-04 10:26:40 +01:00
blk-softirq.c
block: remove a few unused exports
2018-11-15 12:13:25 -07:00
blk-stat.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -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
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
2020-10-29 09:57:34 +01:00
blk-throttle.c
blk-throttle: fix UAF by deleteing timer in blk_throtl_exit()
2021-09-26 14:07:13 +02:00
blk-timeout.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -06:00
blk-wbt.c
blk-wbt: make sure throttle is enabled properly
2021-07-14 16:53:25 +02:00
blk-wbt.h
blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
2021-07-14 16:53:25 +02:00
blk-zoned.c
blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN
2021-09-22 12:26:19 +02:00
blk.h
block: fix memleak of bio integrity data
2020-01-26 10:01:09 +01:00
bounce.c
block: remove the i argument to bio_for_each_segment_all
2019-04-30 09:26:13 -06:00
bsg-lib.c
block: Fix the type of 'sts' in bsg_queue_rq()
2020-01-23 08:22:44 +01:00
bsg.c
scsi: bsg: Remove support for SCSI_IOCTL_SEND_COMMAND
2021-09-22 12:26:23 +02:00
cmdline-parser.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat_ioctl.c
compat_ioctl: block: handle BLKGETZONESZ/BLKGETNRZONES
2020-01-09 10:19:58 +01:00
elevator.c
block: Fix elv_support_iosched()
2019-10-14 13:54:09 -06:00
genhd.c
block: Suppress uevent for hidden device when removed
2021-03-30 14:35:23 +02:00
ioctl.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -06:00
ioprio.c
block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
2021-12-14 14:49:02 +01:00
Kconfig
blkcg: implement blk-iocost
2019-08-28 21:17:12 -06:00
Kconfig.iosched
docs: block: convert to ReST
2019-07-15 09:20:27 -03:00
kyber-iosched.c
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
Makefile
blkcg: implement blk-iocost
2019-08-28 21:17:12 -06:00
mq-deadline.c
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
opal_proto.h
block: sed-opal: Removed duplicate OPAL_METHOD_LENGTH definition
2019-08-20 09:34:49 -06:00
partition-generic.c
block: fix use-after-free on gendisk
2019-04-22 09:48:12 -06:00
scsi_ioctl.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -06:00
sed-opal.c
block: sed-opal: fix sparse warning: convert __be64 data
2019-10-03 14:21:32 -06:00
t10-pi.c
block: t10-pi: fix -Wswitch warning
2019-09-23 08:05:19 -06:00