tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9317f948b0b188b8d2fded75957e6d42c460df1b commit: 50ddd24e216f46c656833753a719f85c5d38238f [12600/13311] kfence: add test suite config: x86_64-randconfig-s022-20201216 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-184-g1b896707-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 50ddd24e216f46c656833753a719f85c5d38238f # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" mm/kfence/kfence_test.c:668:50: sparse: expected restricted gfp_t [usertype] mm/kfence/kfence_test.c:668:50: sparse: got unsigned int vim +668 mm/kfence/kfence_test.c 641 642 /* Test krealloc(). */ 643 static void test_krealloc(struct kunit *test) 644 { 645 const size_t size = 32; 646 const struct expect_report expect = { 647 .type = KFENCE_ERROR_UAF, 648 .fn = test_krealloc, 649 .addr = test_alloc(test, size, GFP_KERNEL, ALLOCATE_ANY), 650 }; 651 char *buf = expect.addr; 652 int i; 653 654 KUNIT_EXPECT_FALSE(test, test_cache); 655 KUNIT_EXPECT_EQ(test, ksize(buf), size); /* Precise size match after KFENCE alloc. */ 656 for (i = 0; i < size; i++) 657 buf[i] = i + 1; 658 659 /* Check that we successfully change the size. */ 660 buf = krealloc(buf, size * 3, GFP_KERNEL); /* Grow. */ 661 /* Note: Might no longer be a KFENCE alloc. */ 662 KUNIT_EXPECT_GE(test, ksize(buf), size * 3); 663 for (i = 0; i < size; i++) 664 KUNIT_EXPECT_EQ(test, buf[i], (char)(i + 1)); 665 for (; i < size * 3; i++) /* Fill to extra bytes. */ 666 buf[i] = i + 1; 667 669 KUNIT_EXPECT_GE(test, ksize(buf), size * 2); 670 for (i = 0; i < size * 2; i++) 671 KUNIT_EXPECT_EQ(test, buf[i], (char)(i + 1)); 672 673 buf = krealloc(buf, 0, GFP_KERNEL); /* Free. */ 674 KUNIT_EXPECT_EQ(test, (unsigned long)buf, (unsigned long)ZERO_SIZE_PTR); 675 KUNIT_ASSERT_FALSE(test, report_available()); /* No reports yet! */ 676 677 READ_ONCE(*expect.addr); /* Ensure krealloc() actually freed earlier KFENCE object. */ 678 KUNIT_ASSERT_TRUE(test, report_matches(&expect)); 679 } 680 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org