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Wed, 18 Oct 2023 12:17:38 +0000 Date: Wed, 18 Oct 2023 20:16:49 +0800 From: kernel test robot To: Linus Walleij Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Subject: arch/arm/kernel/hibernate.c:29:40: warning: array subscript -1 is outside array bounds of 'const void[2147483647]' Message-ID: <202310182007.8ziiRe0j-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: 06dc10eae55b5ceabfef287a7e5f16ceea204aa0 commit: a9ff6961601d9aa0c42b6eb7d850371f31b1f5e6 ARM: mm: Make virt_to_pfn() a static inline date: 5 months ago config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20231018/202310182007.8ziiRe0j-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231018/202310182007.8ziiRe0j-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/202310182007.8ziiRe0j-lkp@intel.com/ All warnings (new ones prefixed by >>): arch/arm/kernel/hibernate.c: In function 'pfn_is_nosave': >> arch/arm/kernel/hibernate.c:29:40: warning: array subscript -1 is outside array bounds of 'const void[2147483647]' [-Warray-bounds=] 29 | unsigned long nosave_end_pfn = virt_to_pfn(&__nosave_end - 1); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/arm/include/asm/sections.h:5, from include/linux/interrupt.h:21, from include/linux/kernel_stat.h:9, from include/linux/cgroup.h:26, from include/linux/memcontrol.h:13, from include/linux/swap.h:9, from include/linux/suspend.h:5, from arch/arm/kernel/hibernate.c:18: include/asm-generic/sections.h:59:45: note: at offset -1 into object '__nosave_end' of size [0, 2147483647] 59 | extern __visible const void __nosave_begin, __nosave_end; | ^~~~~~~~~~~~ vim +29 arch/arm/kernel/hibernate.c 603fb42a66499a Sebastian Capella 2014-03-25 25 603fb42a66499a Sebastian Capella 2014-03-25 26 int pfn_is_nosave(unsigned long pfn) 603fb42a66499a Sebastian Capella 2014-03-25 27 { 603fb42a66499a Sebastian Capella 2014-03-25 28 unsigned long nosave_begin_pfn = virt_to_pfn(&__nosave_begin); 603fb42a66499a Sebastian Capella 2014-03-25 @29 unsigned long nosave_end_pfn = virt_to_pfn(&__nosave_end - 1); 603fb42a66499a Sebastian Capella 2014-03-25 30 603fb42a66499a Sebastian Capella 2014-03-25 31 return (pfn >= nosave_begin_pfn) && (pfn <= nosave_end_pfn); 603fb42a66499a Sebastian Capella 2014-03-25 32 } 603fb42a66499a Sebastian Capella 2014-03-25 33 :::::: The code at line 29 was first introduced by commit :::::: 603fb42a66499ab353466c7afa3d38beea20a8a9 ARM: 8011/1: ARM hibernation / suspend-to-disk :::::: TO: Sebastian Capella :::::: CC: Russell King -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki