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Wenwen Wang c35f5d3145 block/bio-integrity: fix a memory leak bug 
[ Upstream commit e7bf90e5af ]

In bio_integrity_prep(), a kernel buffer is allocated through kmalloc() to
hold integrity metadata. Later on, the buffer will be attached to the bio
structure through bio_integrity_add_page(), which returns the number of
bytes of integrity metadata attached. Due to unexpected situations,
bio_integrity_add_page() may return 0. As a result, bio_integrity_prep()
needs to be terminated with 'false' returned to indicate this error.
However, the allocated kernel buffer is not freed on this execution path,
leading to a memory leak.

To fix this issue, free the allocated buffer before returning from
bio_integrity_prep().

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-07-31 07:28:55 +02:00
..
partitions partitions/aix: fix usage of uninitialized lv_info and lvname structures 2018-09-19 22:43:44 +02:00
badblocks.c badblocks: fix wrong return value in badblocks_set if badblocks are disabled 2017-12-20 10:10:26 +01:00
bfq-cgroup.c block: bfq: swap puts in bfqg_and_blkg_put 2018-09-19 22:43:35 +02:00
bfq-iosched.c block, bfq: NULL out the bic when it's no longer valid 2019-07-21 09:04:30 +02:00
bfq-iosched.h Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
bfq-wf2q.c block, bfq: correctly charge and reset entity service in all cases 2018-11-13 11:14:55 -08:00
bio-integrity.c block/bio-integrity: fix a memory leak bug 2019-07-31 07:28:55 +02:00
bio.c block: bio_iov_iter_get_pages: pin more pages for multi-segment IOs 2019-07-03 13:15:58 +02:00
blk-cgroup.c blkcg: init root blkcg_gq under lock 2018-06-21 04:02:44 +09:00
blk-core.c blk-mq: move cancel of requeue_work into blk_mq_release 2019-06-15 11:54:54 +02:00
blk-exec.c block: introduce new block status code type 2017-06-09 09:27:32 -06:00
blk-flush.c blk-mq: fix a hung issue when fsync 2019-02-20 10:20:44 +01:00
blk-integrity.c block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
blk-ioc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-lib.c block: fix infinite loop if the device loses discard capability 2018-12-29 13:39:07 +01:00
blk-map.c blk_rq_map_user_iov: fix error override 2018-02-25 11:07:49 +01:00
blk-merge.c blk-mq: fix discard merge with scheduler attached 2018-04-26 11:02:15 +02:00
blk-mq-cpumap.c blk-mq: don't keep offline CPUs mapped to hctx 0 2018-04-19 08:56:20 +02:00
blk-mq-debugfs.c blk-mq-debugfs: don't allow write on attributes with seq_operations set 2018-04-26 11:02:11 +02:00
blk-mq-debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-mq-pci.c blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL 2017-08-18 08:08:14 -06:00
blk-mq-rdma.c block: Add rdma affinity based queue mapping helper 2017-08-08 14:58:03 -04:00
blk-mq-sched.c blk-mq: only attempt to merge bio if there is rq in sw queue 2018-09-26 08:38:13 +02:00
blk-mq-sched.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-mq-sysfs.c blk-mq: untangle debugfs and sysfs 2017-05-04 08:24:13 -06:00
blk-mq-tag.c blk-mq: fix updating tags depth 2018-09-19 22:43:39 +02:00
blk-mq-tag.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-mq-virtio.c blk-mq: provide a default queue mapping for virtio device 2017-02-27 20:54:05 +02:00
blk-mq.c blk-mq: move cancel of requeue_work into blk_mq_release 2019-06-15 11:54:54 +02:00
blk-mq.h blk-mq: fix sysfs inflight counter 2018-06-21 04:02:49 +09:00
blk-settings.c block: allow max_discard_segments to be stacked 2018-09-26 08:38:00 +02:00
blk-softirq.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-stat.c blk-stat: don't use this_cpu_ptr() in a preemptable section 2017-05-10 07:40:18 -06:00
blk-stat.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-sysfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-tag.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-throttle.c block-throttle: avoid double charge 2017-12-29 17:53:47 +01:00
blk-timeout.c block: Fix a race between blk_cleanup_queue() and timeout handling 2017-11-30 08:40:52 +00:00
blk-wbt.c blk-wbt: account flush requests correctly 2018-02-22 15:42:29 +01:00
blk-wbt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
blk-zoned.c blkdev_report_zones_ioctl(): Use vmalloc() to allocate large buffers 2018-06-16 09:45:14 +02:00
blk.h block: drain queue before waiting for q_usage_counter becoming zero 2018-03-03 10:24:35 +01:00
bounce.c block: don't let passthrough IO go into .make_request_fn() 2018-01-02 20:31:05 +01:00
bsg-lib.c bsg-lib: fix use-after-free under memory-pressure 2017-10-04 08:35:04 -06:00
bsg.c bsg: remove #if 0'ed code 2017-08-29 10:50:30 -06:00
cfq-iosched.c cfq: Suppress compiler warnings about comparisons 2018-09-15 09:45:31 +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 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
deadline-iosched.c block, scheduler: convert xxx_var_store to void 2017-08-28 10:01:08 -06:00
elevator.c elevator: lookup mq vs non-mq elevators 2018-12-21 14:13:10 +01:00
genhd.c blk-mq: fix sysfs inflight counter 2018-06-21 04:02:49 +09:00
ioctl.c block: remove the discard_zeroes_data flag 2017-04-08 11:25:38 -06:00
ioprio.c block: Add fallthrough markers to switch statements 2017-06-21 11:46:07 -06:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig.iosched License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kyber-iosched.c block: kyber: fix domain token leak during requeue 2018-03-08 22:41:05 -08:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mq-deadline.c mq-deadline: Enable auto-loading when built as module 2017-08-29 10:47:23 -06:00
noop-iosched.c block: move existing elevator ops to union 2017-01-17 10:03:33 -07:00
opal_proto.h block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled 2017-09-11 09:45:52 -06:00
partition-generic.c blk-mq: fix sysfs inflight counter 2018-06-21 04:02:49 +09:00
scsi_ioctl.c block: Change argument type of scsi_req_init() 2017-06-20 19:27:14 -06:00
sed-opal.c block: sed-opal: fix IOC_OPAL_ENABLE_DISABLE_MBR 2019-05-31 06:47:29 -07:00
t10-pi.c t10-pi: Move opencoded contants to common header 2017-07-03 16:56:25 -06:00