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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2017-01-26 17:27:23 +0300 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-02-14 00:39:48 +0200 |
| commit | 4f24ecff0153047a4a8b53c31d8001ee79e1cab7 (patch) | |
| tree | 461df28bb2597ef59f794c1b2374ecd481a9b74e /lib/test_kasan.c | |
| parent | be2eba5810db19a3f752430cd1b03e9457c2959c (diff) | |
| download | op-kernel-dev-4f24ecff0153047a4a8b53c31d8001ee79e1cab7.zip op-kernel-dev-4f24ecff0153047a4a8b53c31d8001ee79e1cab7.tar.gz | |
platform/x86: intel_pmc_core: fix out-of-bounds accesses on stack
pmc_core_mtpmc_link_status() an pmc_core_check_read_lock_bit() use
test_bit() on local 32-bit variable. This causes out-of-bounds
access since test_bit() expects object at least of 'unsigned long' size:
BUG: KASAN: stack-out-of-bounds in pmc_core_probe+0x3aa/0x3b0
Call Trace:
__asan_report_load_n_noabort+0x5c/0x80
pmc_core_probe+0x3aa/0x3b0
local_pci_probe+0xf9/0x1e0
pci_device_probe+0x27b/0x350
driver_probe_device+0x419/0x830
__driver_attach+0x15f/0x1d0
bus_for_each_dev+0x129/0x1d0
driver_attach+0x42/0x70
bus_add_driver+0x385/0x690
driver_register+0x1a9/0x3d0
__pci_register_driver+0x1a2/0x290
intel_pmc_core_driver_init+0x19/0x1b
do_one_initcall+0x12e/0x280
kernel_init_freeable+0x57c/0x623
kernel_init+0x13/0x140
ret_from_fork+0x2e/0x40
Fix this by open coding bit test. While at it, also refactor this code
a little bit.
Fixes: 173943b3dae5 ("platform/x86: intel_pmc_core: ModPhy core lanes pg status")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
[andy: reverted not related changes, used BIT() macro]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'lib/test_kasan.c')
0 files changed, 0 insertions, 0 deletions
