Hi Alexander, [auto build test WARNING on arm64/for-next/core] [also build test WARNING on v4.5-rc5 next-20160226] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Alexander-Potapenko/kasan-arm64-Unpoison-dirty-stack-frames-when-resuming-from-suspend/20160226-204052 base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux for-next/core config: arm64-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm64 All warnings (new ones prefixed by >>): mm/kasan/kasan.c: In function 'kasan_stack_watermark': >> mm/kasan/kasan.c:564:13: warning: assignment makes integer from pointer >> without a cast *watermark = __builtin_frame_address(0); ^ mm/kasan/kasan.c: In function 'kasan_cpu_resume': >> mm/kasan/kasan.c:570:21: warning: initialization makes integer from pointer >> without a cast unsigned long sp = __builtin_frame_address(0); ^ >> mm/kasan/kasan.c:579:3: warning: passing argument 1 of >> 'kasan_unpoison_shadow' makes pointer from integer without a cast kasan_unpoison_shadow(*watermark, sp - *watermark); ^ mm/kasan/kasan.c:53:6: note: expected 'const void *' but argument is of type 'long unsigned int' void kasan_unpoison_shadow(const void *address, size_t size) ^ vim +564 mm/kasan/kasan.c 558 * will be used upon resume to unpoison the dirty stack frames. 559 */ 560 void kasan_stack_watermark(void) 561 { 562 unsigned long *watermark = this_cpu_ptr(&cpu_stack_watermark); 563 > 564 *watermark = __builtin_frame_address(0); 565 } 566 EXPORT_SYMBOL_GPL(kasan_stack_watermark); 567 568 void kasan_cpu_resume(void) 569 { > 570 unsigned long sp = __builtin_frame_address(0); 571 unsigned long *watermark = this_cpu_ptr(&cpu_stack_watermark); 572 573 if (*watermark == 0) { 574 WARN_ON_ONCE(*watermark == 0); 575 *watermark = sp; 576 return; 577 } 578 if (sp > *watermark) { > 579 kasan_unpoison_shadow(*watermark, sp - *watermark); 580 *watermark = 0; 581 } 582 } --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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