[mmotm:master 156/234] lib/test_kasan.c:478:27: sparse: Variable length array is used.

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   a4f20e3ed193cd4b2f742ce37f88112c7441146f
commit: e329261f769afff2744bfeaad6cb7e8c03048e27 [156/234] kasan: add tests for alloca poisoning
reproduce:
        # apt-get install sparse
        git checkout e329261f769afff2744bfeaad6cb7e8c03048e27
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)


vim +478 lib/test_kasan.c

   474	
   475	static noinline void __init kasan_alloca_oob_left(void)
   476	{
   477		volatile int i = 10;
 > 478		char alloca_array[i];
   479		char *p = alloca_array - 1;
   480	
   481		pr_info("out-of-bounds to left on alloca\n");
   482		*(volatile char *)p;
   483	}
   484	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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