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62c789270c
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:
|
||
|---|---|---|
| .. | ||
| badrange.c | ||
| blk.c | ||
| btt_devs.c | ||
| btt.c | ||
| btt.h | ||
| bus.c | ||
| claim.c | ||
| core.c | ||
| dax_devs.c | ||
| dimm_devs.c | ||
| dimm.c | ||
| e820.c | ||
| Kconfig | ||
| label.c | ||
| label.h | ||
| Makefile | ||
| namespace_devs.c | ||
| nd_virtio.c | ||
| nd-core.h | ||
| nd.h | ||
| of_pmem.c | ||
| pfn_devs.c | ||
| pfn.h | ||
| pmem.c | ||
| pmem.h | ||
| region_devs.c | ||
| region.c | ||
| security.c | ||
| virtio_pmem.c | ||
| virtio_pmem.h | ||