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Mauricio Faria de Oliveira a169d7c844 partitions/aix: fix usage of uninitialized lv_info and lvname structures 
[ Upstream commit 14cb2c8a6c ]

The if-block that sets a successful return value in aix_partition()
uses 'lvip[].pps_per_lv' and 'n[].name' potentially uninitialized.

For example, if 'numlvs' is zero or alloc_lvn() fails, neither is
initialized, but are used anyway if alloc_pvd() succeeds after it.

So, make the alloc_pvd() call conditional on their initialization.

This has been hit when attaching an apparently corrupted/stressed
AIX LUN, misleading the kernel to pr_warn() invalid data and hang.

    [...] partition (null) (11 pp's found) is not contiguous
    [...] partition (null) (2 pp's found) is not contiguous
    [...] partition (null) (3 pp's found) is not contiguous
    [...] partition (null) (64 pp's found) is not contiguous

Fixes: 6ceea22bbb ("partitions: add aix lvm partition support files")
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-09-19 22:48:59 +02:00
..
partitions partitions/aix: fix usage of uninitialized lv_info and lvname structures 2018-09-19 22:48:59 +02:00
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
bio-integrity.c bio-integrity: Do not allocate integrity context for bio w/o data 2018-04-13 19:50:17 +02:00
bio.c more bio_map_user_iov() leak fixes 2017-12-16 10:33:56 +01:00
blk-cgroup.c block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg 2018-09-19 22:48:56 +02:00
blk-core.c block: do not use interruptible wait anywhere 2018-07-25 10:18:32 +02:00
blk-exec.c block: move PM request support to IDE 2015-05-05 13:40:42 -06:00
blk-flush.c Revert "blk-flush: Queue through IO scheduler when flush not required" 2015-11-25 10:12:54 -07:00
blk-integrity.c block: fix blk_integrity_register to use template's interval_exp if not 0 2017-05-20 14:27:00 +02:00
blk-ioc.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -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: re-add discard_granularity and alignment checks 2015-10-28 09:12:58 +09:00
blk-map.c Don't feed anything but regular iovec's to blk_rq_map_user_iov 2016-12-10 19:07:26 +01:00
blk-merge.c block: make sure a big bio is split into at most 256 bvecs 2016-09-15 08:27:51 +02:00
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: avoid inserting requests before establishing new mapping 2015-09-29 11:32:50 -06:00
blk-mq-sysfs.c block: add block polling support 2015-11-07 10:40:47 -07:00
blk-mq-tag.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
blk-mq-tag.h blk-mq: factor out a helper to iterate all tags for a request_queue 2015-10-01 10:10:57 +02:00
blk-mq.c blk-mq: fix kernel oops in blk_mq_tag_idle() 2018-04-13 19:50:22 +02:00
blk-mq.h blk-mq: mark __blk_mq_complete_request() static 2015-11-11 09:36:56 -07:00
blk-settings.c block: Initialize max_dev_sectors to 0 2016-03-09 15:34:49 -08:00
blk-softirq.c block: fix regression with block enabled tagging 2014-04-09 21:54:06 -06:00
blk-sysfs.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
blk-tag.c block: support different tag allocation policy 2015-01-23 14:15:46 -07:00
blk-throttle.c blk-throttle: make sure expire time isn't too big 2018-03-22 09:23:22 +01:00
blk-timeout.c block: fix blk_abort_request for blk-mq drivers 2015-11-24 15:24:10 -07:00
blk.h block: protect rw_page against device teardown 2015-11-19 13:47:10 -08:00
bounce.c Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2015-09-19 18:57:09 -07:00
bsg-lib.c Revert "bsg-lib: don't free job in bsg_prepare_job" 2017-10-21 17:09:03 +02:00
bsg.c sg_write()/bsg_write() is not fit to be called under KERNEL_DS 2017-01-09 08:07:53 +01:00
cfq-iosched.c block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg 2018-09-19 22:48:56 +02:00
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 block: check bio_mergeable() early before merging 2015-10-21 15:00:54 -06:00
genhd.c block: fix del_gendisk() vs blkdev_ioctl crash 2017-04-27 09:09:34 +02:00
ioctl.c block: add an API for Persistent Reservations 2015-10-21 14:46:56 -06:00
ioprio.c block: fix use-after-free in sys_ioprio_get() 2016-08-10 11:49:28 +02:00
noop-iosched.c elevator: use list_{first,prev,next}_entry 2015-11-16 15:21:48 -07:00
partition-generic.c block: fix an error code in add_partition() 2018-04-13 19:50:10 +02:00
scsi_ioctl.c block: allow WRITE_SAME commands with the SG_IO ioctl 2017-03-30 09:35:20 +02:00
t10-pi.c block: Consolidate static integrity profile properties 2015-10-21 14:42:38 -06:00