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charset=us-ascii Content-Disposition: inline BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev CC: linux-kernel@vger.kernel.org TO: Nirjhar Roy CC: Andrew Morton CC: Linux Memory Management List CC: "Ritesh Harjani (IBM)" CC: Marco Elver tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 231825b2e1ff6ba799c5eaf396d3ab2354e37c6b commit: 811808d365398680b628d2b88aafeba77c88691a mm/kfence: add a new kunit test test_use_after_free_read_nofault() date: 4 weeks ago :::::: branch date: 16 hours ago :::::: commit date: 4 weeks ago config: arm64-randconfig-r072-20241210 (https://download.01.org/0day-ci/archive/20241212/202412122208.LmoUHCba-lkp@intel.com/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202412122208.LmoUHCba-lkp@intel.com/ smatch warnings: mm/kfence/kfence_test.c:397 test_use_after_free_read_nofault() warn: passing freed memory 'addr' (line 395) vim +/addr +397 mm/kfence/kfence_test.c bc8fbc5f305aecf Marco Elver 2021-02-25 385 811808d36539868 Nirjhar Roy 2024-10-18 386 static void test_use_after_free_read_nofault(struct kunit *test) 811808d36539868 Nirjhar Roy 2024-10-18 387 { 811808d36539868 Nirjhar Roy 2024-10-18 388 const size_t size = 32; 811808d36539868 Nirjhar Roy 2024-10-18 389 char *addr; 811808d36539868 Nirjhar Roy 2024-10-18 390 char dst; 811808d36539868 Nirjhar Roy 2024-10-18 391 int ret; 811808d36539868 Nirjhar Roy 2024-10-18 392 811808d36539868 Nirjhar Roy 2024-10-18 393 setup_test_cache(test, size, 0, NULL); 811808d36539868 Nirjhar Roy 2024-10-18 394 addr = test_alloc(test, size, GFP_KERNEL, ALLOCATE_ANY); 811808d36539868 Nirjhar Roy 2024-10-18 @395 test_free(addr); 811808d36539868 Nirjhar Roy 2024-10-18 396 /* Use after free with *_nofault() */ 811808d36539868 Nirjhar Roy 2024-10-18 @397 ret = copy_from_kernel_nofault(&dst, addr, 1); 811808d36539868 Nirjhar Roy 2024-10-18 398 KUNIT_EXPECT_EQ(test, ret, -EFAULT); 811808d36539868 Nirjhar Roy 2024-10-18 399 KUNIT_EXPECT_FALSE(test, report_available()); 811808d36539868 Nirjhar Roy 2024-10-18 400 } 811808d36539868 Nirjhar Roy 2024-10-18 401 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki