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alistair23-linux/drivers/nvdimm
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Zqiang 62c789270c libnvdimm: KASAN: global-out-of-bounds Read in internal_create_group 
Because the last member of the "nvdimm_firmware_attributes" array
was not assigned a null ptr, when traversal of "grp->attrs" array
is out of bounds in "create_files" func.

func:
	create_files:
		->for (i = 0, attr = grp->attrs; *attr && !error; i++, attr++)
			->....

BUG: KASAN: global-out-of-bounds in create_files fs/sysfs/group.c:43 [inline]
BUG: KASAN: global-out-of-bounds in internal_create_group+0x9d8/0xb20
fs/sysfs/group.c:149
Read of size 8 at addr ffffffff8a2e4cf0 by task kworker/u17:10/959

CPU: 2 PID: 959 Comm: kworker/u17:10 Not tainted 5.8.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),
BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: events_unbound async_run_entry_fn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 create_files fs/sysfs/group.c:43 [inline]
 internal_create_group+0x9d8/0xb20 fs/sysfs/group.c:149
 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:189
 internal_create_groups fs/sysfs/group.c:185 [inline]
 sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:215
 device_add_groups drivers/base/core.c:2024 [inline]
 device_add_attrs drivers/base/core.c:2178 [inline]
 device_add+0x7fd/0x1c40 drivers/base/core.c:2881
 nd_async_device_register+0x12/0x80 drivers/nvdimm/bus.c:506
 async_run_entry_fn+0x121/0x530 kernel/async.c:123
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the variable:
 nvdimm_firmware_attributes+0x10/0x40

Link: https://lore.kernel.org/r/20200812085501.30963-1-qiang.zhang@windriver.com
Link: https://lore.kernel.org/r/20200814150509.225615-1-vaibhav@linux.ibm.com
Fixes: 48001ea50d ("PM, libnvdimm: Add runtime firmware activation support")
Reported-by: syzbot+1cf0ffe61aecf46f588f@syzkaller.appspotmail.com
Reported-by: Sandipan Das <sandipan@linux.ibm.com>
Reported-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
 		2020-08-17 14:47:38 -06:00
..
Kconfig lib: Uplevel the pmem "region" ida to a global allocator 2019-11-07 15:44:29 +01:00
Makefile libnvdimm: Enable unit test infrastructure compile checks 2019-09-07 04:28:05 -03:00
badrange.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
blk.c block: move ->make_request_fn to struct block_device_operations 2020-07-01 07:27:24 -06:00
btt.c mm: add thp_size 2020-08-14 19:56:56 -07:00
btt.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
btt_devs.c libnvdimm: Move attribute groups to device type 2019-11-17 09:17:38 -08:00
bus.c libnvdimm: Validate command family indices 2020-07-25 19:34:47 -06:00
claim.c libnvdimm/namespace: Differentiate between probe mapping and runtime mapping 2019-11-14 19:08:47 -08:00
core.c PM, libnvdimm: Add runtime firmware activation support 2020-07-28 19:28:32 -06:00
dax_devs.c libnvdimm: Move attribute groups to device type 2019-11-17 09:17:38 -08:00
dimm.c libnvdimm/region: Introduce NDD_LABELING 2020-03-17 12:23:21 -07:00
dimm_devs.c libnvdimm: KASAN: global-out-of-bounds Read in internal_create_group 2020-08-17 14:47:38 -06:00
e820.c libnvdimm/e820: Retrieve and populate correct 'target_node' info 2020-02-18 10:28:05 -08:00
label.c libnvdimm/label: Remove the dpa align check 2019-09-05 16:11:14 -07:00
label.h libnvdimm/label: Replace zero-length array with flexible-array member 2020-03-30 12:37:09 -07:00
namespace_devs.c libnvdimm: Convert to DEVICE_ATTR_ADMIN_RO() 2020-07-28 12:21:10 -06:00
nd-core.h PM, libnvdimm: Add runtime firmware activation support 2020-07-28 19:28:32 -06:00
nd.h nvdimm: use bio_{start,end}_io_acct 2020-05-27 05:21:23 -06:00
nd_virtio.c virtio_pmem: fix sparse warning 2019-07-16 19:44:26 -07:00
of_pmem.c powerpc/pmem: Initialize pmem device on newer hardware 2020-07-16 13:00:23 +10:00
pfn.h libnvdimm/namespace: Enforce memremap_compat_align() 2020-03-17 12:23:21 -07:00
pfn_devs.c libnvdimm: Convert to DEVICE_ATTR_ADMIN_RO() 2020-07-28 12:21:10 -06:00
pmem.c mm: add thp_size 2020-08-14 19:56:56 -07:00
pmem.h libnvdimm, pmem: Restore page attributes when clearing errors 2018-08-20 09:22:45 -07:00
region.c libnvdimm/region: Initialize bad block for volatile namespaces 2019-09-24 10:27:51 -07:00
region_devs.c libnvdimm for 5.9 2020-08-11 10:59:19 -07:00
security.c libnvdimm for 5.9 2020-08-11 10:59:19 -07:00
virtio_pmem.c virtio_pmem: convert to LE accessors 2020-08-05 11:08:41 -04:00
virtio_pmem.h virtio-pmem: Add virtio pmem driver 2019-07-05 15:19:10 -07:00