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Jens Axboe a08ed9aae8 block: fix double bio queue when merging in cached request path 
When we attempt to merge off the cached request path, we return NULL
if successful. This makes the caller believe that it's should allocate
a new request, and hence we end up with the bio both merged and associated
with a new request. This, predictably, leads to all sorts of crashes.

Pass in a pointer to the bio pointer, and clear it for the merge case.
Then the caller knows that the bio is already queued, and no new requests
need to get allocated.

Fixes: 5b13bc8a3fd5 ("blk-mq: cleanup request allocation")
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-12-02 19:39:01 -07:00
..
partitions
block: remove GENHD_FL_EXT_DEVT
2021-11-29 06:38:35 -07:00
badblocks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
bdev.c
block: Remove redundant initialization of variable ret
2021-11-29 06:41:29 -07:00
bfq-cgroup.c
block, bfq: fix UAF problem in bfqg_stats_init()
2021-10-19 15:18:30 -06:00
bfq-iosched.c
block: simplify ioc_lookup_icq
2021-11-29 06:41:29 -07:00
bfq-iosched.h
bfq: Provide helper to generate bfqq name
2021-11-29 06:38:52 -07:00
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: avoid extra iter advance with async iocb
2021-10-27 06:54:58 -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: don't include <linux/part_stat.h> in blk.h
2021-11-29 06:38:44 -07:00
blk-core.c
block: don't include <linux/part_stat.h> in blk.h
2021-11-29 06:38:44 -07:00
blk-crypto-fallback.c
blk-crypto: rename blk_keyslot_manager to blk_crypto_profile
2021-10-21 10:49:32 -06:00
blk-crypto-internal.h
block: move struct request to blk-mq.h
2021-10-18 06:17:02 -06:00
blk-crypto-profile.c
blk-crypto: remove blk_crypto_unregister()
2021-11-29 06:38:51 -07:00
blk-crypto.c
blk-crypto: rename blk_keyslot_manager to blk_crypto_profile
2021-10-21 10:49:32 -06:00
blk-flush.c
block: Fix fsync always failed if once failed
2021-11-29 06:46:04 -07:00
blk-ia-ranges.c
block: fix kerneldoc for disk_register_independent_access__ranges()
2021-11-11 11:52:30 -07:00
blk-integrity.c
blk-crypto: remove blk_crypto_unregister()
2021-11-29 06:38:51 -07:00
blk-ioc.c
block: simplify ioc_lookup_icq
2021-11-29 06:41:29 -07:00
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
blk-ioprio: don't set bio priority if not needed
2021-11-29 06:38:35 -07:00
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: don't check ->rq_disk in merges
2021-11-29 06:41:29 -07:00
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
blk-mq: check q->poll_stat in queue_poll_stat_show
2021-12-02 08:20:49 -07:00
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: move blk_mq_sched_assign_ioc to blk-ioc.c
2021-11-29 06:41:29 -07:00
blk-mq-sched.h
block: move blk_mq_sched_assign_ioc to blk-ioc.c
2021-11-29 06:41:29 -07:00
blk-mq-sysfs.c
block: remove blk-mq-sysfs dead code
2021-08-02 13:37:29 -06:00
blk-mq-tag.c
blk-mq: Fix blk_mq_tagset_busy_iter() for shared tags
2021-10-21 08:21:52 -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: fix double bio queue when merging in cached request path
2021-12-02 19:39:01 -07:00
blk-mq.h
block: move request based cloning helpers to blk-mq.c
2021-11-29 06:34:50 -07:00
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: Fix partition check for host-aware zoned block devices
2021-10-27 06:58:01 -06:00
blk-stat.c
block: only allocate poll_stats if there's a user of them
2021-11-29 06:38:35 -07:00
blk-stat.h
block: only allocate poll_stats if there's a user of them
2021-11-29 06:38:35 -07:00
blk-sysfs.c
block: don't include blk-mq-sched.h in blk.h
2021-11-29 06:38:44 -07:00
blk-throttle.c
block: don't include blk-mq.h in blk.h
2021-11-29 06:38:44 -07:00
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
block: Hold invalidate_lock in BLKRESETZONE ioctl
2021-11-11 11:52:46 -07:00
blk.h
block: remove the ->rq_disk field in struct request
2021-11-29 06:41:29 -07:00
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
block: remove the gendisk argument to blk_execute_rq
2021-11-29 06:41:29 -07:00
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
block: remove the e argument to elevator_exit
2021-11-29 06:38:44 -07:00
elevator.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
fops.c
for-5.16/bdev-size-2021-11-09
2021-11-09 11:16:20 -08:00
genhd.c
block: don't include <linux/part_stat.h> in blk.h
2021-11-29 06:38:44 -07:00
holder.c
block: drop unused includes in <linux/genhd.h>
2021-10-18 06:17:02 -06:00
ioctl.c
block: merge disk_scan_partitions and blkdev_reread_part
2021-11-29 06:35:21 -07:00
ioprio.c
block: Check ADMIN before NICE for IOPRIO_CLASS_RT
2021-11-15 14:28:59 -07:00
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
kyber-iosched.c
blk-mq: Stop using pointers for blk_mq_tags bitmap tags
2021-10-18 06:17:03 -06:00
Makefile
block: remove blk-exec.c
2021-11-29 06:34:50 -07:00
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