Ming Lei 245165658e blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none ...

After grabbing q->sysfs_lock, q->elevator may become NULL because of
elevator switch.

Fix the NULL dereference on q->elevator by checking it with lock.

Reported-by: Guangwu Zhang <guazhang@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20230616132354.415109-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2023-06-16 10:12:25 -06:00

..

partitions

block: remove blk_drop_partitions

2023-06-05 10:53:04 -06:00

badblocks.c

…

bdev.c

block: replace fmode_t with a block-specific type for block open flags

2023-06-12 08:04:05 -06:00

bfq-cgroup.c

blkcg: Restructure blkg_conf_prep() and friends

2023-04-13 06:46:49 -06:00

bfq-iosched.c

block: BFQ: Move an invariant check

2023-05-19 19:59:52 -06:00

bfq-iosched.h

block, bfq: remove BFQ_WEIGHT_LEGACY_DFL

2023-04-06 16:17:32 -06:00

bfq-wf2q.c

…

bio-integrity.c

block: bio-integrity: Copy flags when bio_integrity_payload is cloned

2023-02-16 11:05:41 -07:00

bio.c

block: add bio_add_folio_nofail

2023-06-01 09:13:31 -06:00

blk-cgroup-fc-appid.c

block: Replace all non-returning strlcpy with strscpy

2023-06-01 09:13:31 -06:00

blk-cgroup-rwstat.c

Revert "blk-cgroup: pin the gendisk in struct blkcg_gq"

2023-02-14 14:24:09 -07:00

blk-cgroup-rwstat.h

…

blk-cgroup.c

blk-cgroup: Reinit blkg_iostat_set after clearing in blkcg_reset_stats()

2023-06-07 07:51:34 -06:00

blk-cgroup.h

Merge tag 'for-6.4/block-2023-04-21' of git://git.kernel.dk/linux

2023-04-26 12:52:58 -07:00

blk-core.c

block/rq_qos: protect rq_qos apis with a new lock

2023-05-23 11:13:19 -06:00

blk-crypto-fallback.c

…

blk-crypto-internal.h

blk-crypto: remove blk_crypto_insert_cloned_request()

2023-03-16 09:35:09 -06:00

blk-crypto-profile.c

blk-crypto: drop the NULL check from blk_crypto_put_keyslot()

2023-03-16 09:35:09 -06:00

blk-crypto-sysfs.c

block: make kobj_type structures constant

2023-02-09 09:38:16 -07:00

blk-crypto.c

blk-crypto: make blk_crypto_evict_key() more robust

2023-03-16 09:35:09 -06:00

blk-flush.c

blk-mq: don't use the requeue list to queue flush commands

2023-05-19 19:52:42 -06:00

blk-ia-ranges.c

block: make kobj_type structures constant

2023-02-09 09:38:16 -07:00

blk-integrity.c

blk-integrity: register sysfs attributes on struct device

2023-04-26 18:22:50 -06:00

blk-ioc.c

blk-ioc: fix recursive spin_lock/unlock_irq() in ioc_clear_queue()

2023-06-07 07:51:00 -06:00

blk-iocost.c

blk-iocost: use spin_lock_irqsave in adjust_inuse_and_calc_cost

2023-06-05 12:08:32 -06:00

blk-iolatency.c

blk-iolatency: Make initialization lazy

2023-04-13 06:46:49 -06:00

blk-ioprio.c

blk-ioprio: Introduce promote-to-rt policy

2023-06-06 22:26:26 -06:00

blk-ioprio.h

…

blk-lib.c

…

blk-map.c

block: convert bio_map_user_iov to use iov_iter_extract_pages

2023-05-24 08:42:44 -06:00

blk-merge.c

blk-mq: release crypto keyslot before reporting I/O complete

2023-03-16 09:35:09 -06:00

blk-mq-cpumap.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-mq-debugfs-zoned.c

…

blk-mq-debugfs.c

blk-mq: fix potential io hang by wrong 'wake_batch'

2023-06-12 09:55:53 -06:00

blk-mq-debugfs.h

…

blk-mq-pci.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-mq-sched.c

blk-mq: cleanup __blk_mq_sched_dispatch_requests

2023-04-13 06:57:18 -06:00

blk-mq-sched.h

blk-mq: make sure elevator callbacks aren't called for passthrough request

2023-05-18 19:42:54 -06:00

blk-mq-sysfs.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-mq-tag.c

blk-mq: fix potential io hang by wrong 'wake_batch'

2023-06-12 09:55:53 -06:00

blk-mq-virtio.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-mq.c

blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none

2023-06-16 10:12:25 -06:00

blk-mq.h

blk-mq: fix potential io hang by wrong 'wake_batch'

2023-06-12 09:55:53 -06:00

blk-pm.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-pm.h

…

blk-rq-qos.c

block/rq_qos: protect rq_qos apis with a new lock

2023-05-23 11:13:19 -06:00

blk-rq-qos.h

blk-iolatency: s/blkcg_rq_qos/iolat_rq_qos/

2023-04-13 06:46:49 -06:00

blk-settings.c

blk-wbt: move private information from blk-wbt.h to blk-wbt.c

2023-02-03 08:20:05 -07:00

blk-stat.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-stat.h

…

blk-sysfs.c

blk-mq: include <linux/blk-mq.h> in block/blk-mq.h

2023-04-13 06:52:29 -06:00

blk-throttle.c

blk-throttle: only enable blk-stat when BLK_DEV_THROTTLING_LOW

2023-04-13 06:48:11 -06:00

blk-throttle.h

…

blk-timeout.c

…

blk-wbt.c

block/rq_qos: protect rq_qos apis with a new lock

2023-05-23 11:13:19 -06:00

blk-wbt.h

blk-wbt: move private information from blk-wbt.h to blk-wbt.c

2023-02-03 08:20:05 -07:00

blk-zoned.c

block: replace fmode_t with a block-specific type for block open flags

2023-06-12 08:04:05 -06:00

blk.h

block: remove BIO_PAGE_REFFED

2023-06-16 10:08:09 -06:00

bounce.c

…

bsg-lib.c

scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

2023-06-12 08:04:04 -06:00

bsg.c

scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool

2023-06-12 08:04:04 -06:00

disk-events.c

block: pass a gendisk on bdev_check_media_change

2023-06-12 08:04:03 -06:00

early-lookup.c

block: fix rootwait= again

2023-06-09 11:38:10 -06:00

elevator.c

block: Replace all non-returning strlcpy with strscpy

2023-06-01 09:13:31 -06:00

elevator.h

blk-mq: pass a flags argument to elevator_type->insert_requests

2023-04-13 06:52:30 -06:00

fops.c

block: store the holder in file->private_data

2023-06-12 08:04:05 -06:00

genhd.c

block: fix blktrace debugfs entries leakage

2023-06-14 20:24:03 -06:00

holder.c

…

ioctl.c

block: replace fmode_t with a block-specific type for block open flags

2023-06-12 08:04:05 -06:00

ioprio.c

…

Kconfig

Merge tag 'for-6.4/block-2023-04-21' of git://git.kernel.dk/linux

2023-04-26 12:52:58 -07:00

Kconfig.iosched

…

kyber-iosched.c

blk-mq: pass a flags argument to elevator_type->insert_requests

2023-04-13 06:52:30 -06:00

Makefile

block: move the code to do early boot lookup of block devices to block/

2023-06-05 10:57:40 -06:00

mq-deadline.c

block: mq-deadline: Fix handling of at-head zoned writes

2023-05-18 19:47:49 -06:00

opal_proto.h

sed-opal: allow user authority to get locking range attributes.

2023-04-05 07:46:25 -06:00

sed-opal.c

sed-opal: geometry feature reporting command

2023-04-19 14:07:13 -06:00

t10-pi.c

…