Jens Axboe 9470e4a693 cfq-iosched: fix sysfs oops when attempting to read unconfigured weights ...

If none of the devices in the system are using CFQ, then attempting to
read:

/sys/fs/cgroup/blkio/blkio.leaf_weight

will results in a NULL dereference. Check for a valid cfq_group_data
struct before attempting to dereference it.

Reported-by: Andrey Wagin <avagin@gmail.com>
Fixes: e48453c3 ("block, cgroup: implement policy-specific per-blkcg data")
Signed-off-by: Jens Axboe <axboe@fb.com>

2015-06-19 10:19:36 -06:00

..

partitions

Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block

2015-02-12 14:13:23 -08:00

bio-integrity.c

block: remove management of bi_remaining when restoring original bi_end_io

2015-05-22 08:58:55 -06:00

bio.c

block: remove management of bi_remaining when restoring original bi_end_io

2015-05-22 08:58:55 -06:00

blk-cgroup.c

block, cgroup: implement policy-specific per-blkcg data

2015-06-07 08:10:08 -06:00

blk-cgroup.h

block, cgroup: implement policy-specific per-blkcg data

2015-06-07 08:10:08 -06:00

blk-core.c

block, dm: don't copy bios for request clones

2015-05-22 08:58:57 -06:00

blk-exec.c

block: move PM request support to IDE

2015-05-05 13:40:42 -06:00

blk-flush.c

blk-mq: support per-distpatch_queue flush machinery

2014-09-25 15:22:45 -06:00

blk-integrity.c

block: Don't merge requests if integrity flags differ

2014-09-27 09:14:57 -06:00

blk-ioc.c

block: Substitute rcu_access_pointer() for rcu_dereference_raw()

2014-02-18 12:21:26 -08:00

blk-iopoll.c

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next

2014-06-03 12:57:53 -07:00

blk-lib.c

block: Quiesce zeroout wrapper

2015-02-05 10:14:54 -07:00

blk-map.c

blk_rq_map_user(): use import_single_range()

2015-04-11 22:27:13 -04:00

blk-merge.c

block: only honor SG gap prevention for merges that contain data

2015-05-29 13:10:23 -06:00

blk-mq-cpu.c

blk-mq: add file comments and update copyright notices

2014-05-28 10:15:41 -06:00

blk-mq-cpumap.c

blk-mq: Use all available hardware queues

2014-12-09 09:08:21 -07:00

blk-mq-sysfs.c

blk-mq: add blk_mq_init_allocated_queue and export blk_mq_register_disk

2015-03-13 08:26:53 -06:00

blk-mq-tag.c

blk-mq: Shared tag enhancements

2015-06-01 14:35:56 -06:00

blk-mq-tag.h

blk-mq: Shared tag enhancements

2015-06-01 14:35:56 -06:00

blk-mq.c

blk-mq: Shared tag enhancements

2015-06-01 14:35:56 -06:00

blk-mq.h

blk-mq: release mq's kobjects in blk_release_queue()

2015-01-29 08:30:51 -08:00

blk-settings.c

block: fix blk_stack_limits() regression due to lcm() change

2015-03-31 09:45:50 -06:00

blk-softirq.c

block: fix regression with block enabled tagging

2014-04-09 21:54:06 -06:00

blk-sysfs.c

blk-mq: release mq's kobjects in blk_release_queue()

2015-01-29 08:30:51 -08:00

blk-tag.c

block: support different tag allocation policy

2015-01-23 14:15:46 -07:00

blk-throttle.c

blk-throttle: check stats_cpu before reading it from sysfs

2015-02-20 22:11:58 -08:00

blk-timeout.c

blk-mq: Allow requests to never expire

2015-01-08 08:59:01 -07:00

blk.h

blk-mq: make plug work for mutiple disks and queues

2015-05-08 14:17:23 -06:00

bounce.c

block: remove BIO_EOPNOTSUPP

2015-05-19 09:17:03 -06:00

bsg-lib.c

bsg: Remove unused function bsg_goose_queue()

2012-12-06 14:33:02 +01:00

bsg.c

block: Simplify bsg complete all

2015-02-04 09:57:52 -07:00

cfq-iosched.c

cfq-iosched: fix sysfs oops when attempting to read unconfigured weights

2015-06-19 10:19:36 -06:00

cmdline-parser.c

block: remove unrelated header files and export symbol

2014-01-21 20:18:26 -08:00

compat_ioctl.c

block, bdi: an active gendisk always has a request_queue associated with it

2014-09-08 10:00:35 -06:00

deadline-iosched.c

block: Stop abusing csd.list for fifo_time

2014-02-24 14:46:32 -08:00

elevator.c

cfq-iosched: fix the setting of IOPS mode on SSDs

2015-06-10 08:01:20 -06:00

genhd.c

genhd: check for int overflow in disk_expand_part_tbl()

2014-11-19 13:09:07 -07:00

ioctl.c

block: replace trylock with mutex_lock in blkdev_reread_part()

2015-05-20 09:05:45 -06:00

ioprio.c

block: Fix computation of merged request priority

2014-10-31 08:30:43 -06:00

Kconfig

block: Add T10 Protection Information functions

2014-09-27 09:14:59 -06:00

Kconfig.iosched

blkcg: make CONFIG_BLK_CGROUP bool

2012-03-06 21:27:21 +01:00

Makefile

block: Add T10 Protection Information functions

2014-09-27 09:14:59 -06:00

noop-iosched.c

elevator: Fix a race in elevator switching

2013-07-03 13:25:24 +02:00

partition-generic.c

block: Fix dev_t minor allocation lifetime

2014-09-03 15:01:02 -06:00

scsi_ioctl.c

sg_io(): use import_iovec()

2015-04-11 22:27:13 -04:00

t10-pi.c

block: Add T10 Protection Information functions

2014-09-27 09:14:59 -06:00