Yang Yingliang 3b7995a98a block: fix memleak when __blk_rq_map_user_iov() is failed ... When I doing fuzzy test, get the memleak report: BUG: memory leak unreferenced object 0xffff88837af80000 (size 4096): comm "memleak", pid 3557, jiffies 4294817681 (age 112.499s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 20 00 00 00 10 01 00 00 00 00 00 00 01 00 00 00 ............... backtrace: [<000000001c894df8>] bio_alloc_bioset+0x393/0x590 [<000000008b139a3c>] bio_copy_user_iov+0x300/0xcd0 [<00000000a998bd8c>] blk_rq_map_user_iov+0x2f1/0x5f0 [<000000005ceb7f05>] blk_rq_map_user+0xf2/0x160 [<000000006454da92>] sg_common_write.isra.21+0x1094/0x1870 [<00000000064bb208>] sg_write.part.25+0x5d9/0x950 [<000000004fc670f6>] sg_write+0x5f/0x8c [<00000000b0d05c7b>] __vfs_write+0x7c/0x100 [<000000008e177714>] vfs_write+0x1c3/0x500 [<0000000087d23f34>] ksys_write+0xf9/0x200 [<000000002c8dbc9d>] do_syscall_64+0x9f/0x4f0 [<00000000678d8e9a>] entry_SYSCALL_64_after_hwframe+0x49/0xbe If __blk_rq_map_user_iov() is failed in blk_rq_map_user_iov(), the bio(s) which is allocated before this failing will leak. The refcount of the bio(s) is init to 1 and increased to 2 by calling bio_get(), but __blk_rq_unmap_user() only decrease it to 1, so the bio cannot be freed. Fix it by calling blk_rq_unmap_user(). Reviewed-by: Bob Liu <bob.liu@oracle.com> Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2019-12-20 11:52:01 -07:00
..
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-iosched: Ensure bio->bi_blkg is valid before using it	2019-12-05 07:10:09 -07:00
bfq-iosched.c	for-5.5/block-20191121	2019-11-25 10:59:41 -08:00
bfq-iosched.h	block,bfq: Skip tracing hooks if possible	2019-11-20 16:10:29 -07:00
bfq-wf2q.c	bfq: Fix the missing barrier in __bfq_entity_update_weight_prio	2019-09-06 14:33:48 -06:00
bio-integrity.c	block: fix memleak of bio integrity data	2019-12-05 11:38:36 -07:00
bio.c	block: fix "check bi_size overflow before merge"	2019-12-09 22:04:35 -07:00
blk-cgroup-rwstat.c	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -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	blk-cgroup: remove blkcg_drain_queue	2019-12-12 09:26:55 -07:00
blk-core.c	block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT	2019-12-17 09:01:43 -07:00
blk-exec.c	block: account statistics for passthrough requests	2019-10-10 17:52:31 -06:00
blk-flush.c	block: Fix a lockdep complaint triggered by request queue flushing	2019-12-20 11:52:01 -07:00
blk-integrity.c	block: centralize PI remapping logic to the block layer	2019-09-17 20:03:49 -06:00
blk-ioc.c	block: remove the queue_lock indirection	2018-11-15 12:17:28 -07:00
blk-iocost.c	iocost: over-budget forced IOs should schedule async delay	2019-12-16 16:10:17 -07:00
blk-iolatency.c	blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/	2019-08-28 21:17:08 -06:00
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	2019-12-20 11:52:01 -07:00
blk-merge.c	Revert "block: split bio if the only bvec's length is > SZ_4K"	2019-11-21 10:16:12 -07:00
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	for-5.3/block-20190708	2019-07-09 10:45:06 -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	blk-mq: move lockdep_assert_held() into elevator_exit	2019-09-26 00:45:05 -06:00
blk-mq-sched.h	block: blk-mq: Remove blk_mq_sched_started_request and started_request	2019-07-23 07:25:09 -06:00
blk-mq-sysfs.c	blk-mq: make sure that line break can be printed	2019-11-04 07:14:10 -07:00
blk-mq-tag.c	blk-mq: Delete blk_mq_has_free_tags() and blk_mq_can_queue()	2019-11-13 12:50:38 -07:00
blk-mq-tag.h	blk-mq: Delete blk_mq_has_free_tags() and blk_mq_can_queue()	2019-11-13 12:50:38 -07:00
blk-mq-virtio.c	block: Fix blk_mq_*_map_queues() kernel-doc headers	2019-05-31 15:12:34 -06:00
blk-mq.c	blk-mq: Delete blk_mq_has_free_tags() and blk_mq_can_queue()	2019-11-13 12:50:38 -07:00
blk-mq.h	blk-mq: Inline status checkers	2019-10-07 08:31:59 -06:00
blk-pm.c	block: bypass blk_set_runtime_active for uninitialized q->dev	2019-09-12 07:11:56 -06:00
blk-pm.h	block: remove the queue_lock indirection	2018-11-15 12:17:28 -07:00
blk-rq-qos.c	blk-wbt: fix performance regression in wbt scale_up/scale_down	2019-10-06 09:26:41 -06:00
blk-rq-qos.h	blk-rq-qos: fix first node deletion of rq_qos_del()	2019-10-15 10:13:13 -06:00
blk-settings.c	dma-mapping updates for 5.4:	2019-09-19 13:27:23 -07:00
blk-softirq.c	block: Don't disable interrupts in trigger_softirq()	2019-11-18 07:29:22 -07:00
blk-stat.c	blk-stat: Optimise blk_stat_add()	2019-10-07 21:19:10 -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: Remove "dying" checks from sysfs callbacks	2019-10-07 08:31:59 -06:00
blk-throttle.c	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
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: fix performance regression in wbt scale_up/scale_down	2019-10-06 09:26:41 -06:00
blk-wbt.h	block/rq_qos: implement rq_qos_ops->queue_depth_changed()	2019-08-28 21:17:07 -06:00
blk-zoned.c	block: set the zone size in blk_revalidate_disk_zones atomically	2019-12-03 10:18:22 -07:00
blk.h	block: Fix a lockdep complaint triggered by request queue flushing	2019-12-20 11:52:01 -07:00
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()	2019-12-20 11:52:01 -07:00
bsg.c	block: switch all files cleared marked as GPLv2 to SPDX tags	2019-04-30 16:11:57 -06:00
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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
elevator.c	Merge branch 'for-linus' into for-5.5/block	2019-11-07 12:27:19 -07:00
genhd.c	block: add iostat counters for flush requests	2019-11-21 09:06:47 -07:00
ioctl.c	block: simplify blkdev_nr_zones	2019-12-03 08:51:24 -07:00
ioprio.c	docs: block: convert to ReST	2019-07-15 09:20:27 -03:00
Kconfig	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
Kconfig.iosched	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
kyber-iosched.c	blk-mq: remove blk_mq_put_ctx()	2019-07-02 21:03:27 -06:00
Makefile	blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT	2019-11-07 12:28:13 -07:00
mq-deadline.c	block: Introduce elevator features	2019-09-05 19:52:33 -06:00
opal_proto.h	block: sed-opal: Introduce SUM_SET_LIST parameter and append it using 'add_token_u64'	2019-11-18 09:49:15 -07:00
partition-generic.c	for-5.5/disk-revalidate-20191122	2019-11-25 11:37:01 -08:00
scsi_ioctl.c	compat_ioctl: reimplement SG_IO handling	2019-10-23 17:23:46 +02:00
sed-opal.c	block: sed-opal: Introduce SUM_SET_LIST parameter and append it using 'add_token_u64'	2019-11-18 09:49:15 -07:00
t10-pi.c	block: Fix three kernel-doc warnings	2019-10-07 08:31:59 -06:00