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Tue, 21 Nov 2023 08:46:46 +0000 Date: Tue, 21 Nov 2023 16:45:45 +0800 From: kernel test robot To: Sami Tolvanen Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Palmer Dabbelt Subject: kernel/scs.c:86:21: sparse: sparse: Using plain integer as NULL pointer Message-ID: <202311211604.nMVAanJQ-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 98b1cc82c4affc16f5598d4fa14b1858671b2263 commit: d1584d791a297aa8ed93503382a682a6ecfc4218 riscv: Implement Shadow Call Stack date: 3 weeks ago config: riscv-randconfig-r132-20231121 (https://download.01.org/0day-ci/archive/20231121/202311211604.nMVAanJQ-lkp@intel.com/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce: (https://download.01.org/0day-ci/archive/20231121/202311211604.nMVAanJQ-lkp@intel.com/reproduce) 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 | Closes: https://lore.kernel.org/oe-kbuild-all/202311211604.nMVAanJQ-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) WARNING: invalid argument to '-march': '_zihintpause' >> kernel/scs.c:86:21: sparse: sparse: Using plain integer as NULL pointer >> kernel/scs.c:86:21: sparse: sparse: Using plain integer as NULL pointer >> kernel/scs.c:86:21: sparse: sparse: Using plain integer as NULL pointer >> kernel/scs.c:86:21: sparse: sparse: Using plain integer as NULL pointer vim +86 kernel/scs.c d08b9f0ca6605e Sami Tolvanen 2020-04-27 72 a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 73 void scs_free(void *s) d08b9f0ca6605e Sami Tolvanen 2020-04-27 74 { a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 75 int i; a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 76 bee348fab099b0 Will Deacon 2020-05-15 77 __scs_account(s, -1); a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 78 a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 79 /* a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 80 * We cannot sleep as this can be called in interrupt context, a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 81 * so use this_cpu_cmpxchg to update the cache, and vfree_atomic a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 82 * to free the stack. a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 83 */ a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 84 a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 85 for (i = 0; i < NR_CACHED_SCS; i++) a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 @86 if (this_cpu_cmpxchg(scs_cache[i], 0, s) == NULL) a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 87 return; a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 88 f6e39794f4b6da Andrey Konovalov 2022-03-24 89 kasan_unpoison_vmalloc(s, SCS_SIZE, KASAN_VMALLOC_PROT_NORMAL); a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 90 vfree_atomic(s); a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 91 } a2abe7cbd8fe2d Sami Tolvanen 2020-11-30 92 :::::: The code at line 86 was first introduced by commit :::::: a2abe7cbd8fe2db5ff386c968e2273d9dc6c468d scs: switch to vmapped shadow stacks :::::: TO: Sami Tolvanen :::::: CC: Will Deacon -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki