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d="scan'208";a="310694178" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Feb 2023 19:53:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10616"; a="913391269" X-IronPort-AV: E=Sophos;i="5.97,285,1669104000"; d="scan'208";a="913391269" Received: from lkp-server01.sh.intel.com (HELO 4455601a8d94) ([10.239.97.150]) by fmsmga006.fm.intel.com with ESMTP; 09 Feb 2023 19:53:18 -0800 Received: from kbuild by 4455601a8d94 with local (Exim 4.96) (envelope-from ) id 1pQKTN-0005WM-2g; Fri, 10 Feb 2023 03:53:17 +0000 Date: Fri, 10 Feb 2023 11:52:55 +0800 From: kernel test robot To: Gao Xiang Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Yue Hu , Chao Yu , Chao Yu Subject: arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc) Message-ID: <202302101104.mgetTzwR-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 38c1e0c65865426676123cc9a127526fa02bcac6 commit: 2f44013e39984c127c6efedf70e6b5f4e9dcf315 erofs: fix pcluster use-after-free on UP platforms date: 5 months ago config: alpha-randconfig-s042-20230210 (https://download.01.org/0day-ci/archive/20230210/202302101104.mgetTzwR-lkp@intel.com/config) compiler: alpha-linux-gcc (GCC) 12.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2f44013e39984c127c6efedf70e6b5f4e9dcf315 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2f44013e39984c127c6efedf70e6b5f4e9dcf315 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=alpha olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=alpha SHELL=/bin/bash fs/erofs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202302101104.mgetTzwR-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) fs/erofs/utils.c: note: in included file (through arch/alpha/include/asm/cmpxchg.h, arch/alpha/include/asm/atomic.h, include/linux/atomic.h, ...): >> arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc) >> arch/alpha/include/asm/xchg.h:236:32: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes 10cc) -- fs/erofs/zdata.c: note: in included file (through arch/alpha/include/asm/cmpxchg.h, arch/alpha/include/asm/atomic.h, include/linux/atomic.h, ...): >> arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes cc) >> arch/alpha/include/asm/xchg.h:236:32: sparse: sparse: cast truncates bits from constant value (ffffffffe0f510cc becomes 10cc) arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes fe) arch/alpha/include/asm/xchg.h:236:32: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes cafe) arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes fe) arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (5f0edead becomes ad) arch/alpha/include/asm/xchg.h:236:32: sparse: sparse: cast truncates bits from constant value (5f0ecafe becomes cafe) arch/alpha/include/asm/xchg.h:236:32: sparse: sparse: cast truncates bits from constant value (5f0edead becomes dead) vim +234 arch/alpha/include/asm/xchg.h a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 227 a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 228 static __always_inline unsigned long a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 229 ____cmpxchg(, volatile void *ptr, unsigned long old, unsigned long new, a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 230 int size) a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 231 { a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 232 switch (size) { a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 233 case 1: a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 @234 return ____cmpxchg(_u8, ptr, old, new); a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 235 case 2: a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 @236 return ____cmpxchg(_u16, ptr, old, new); a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 237 case 4: a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 238 return ____cmpxchg(_u32, ptr, old, new); a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 239 case 8: a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 240 return ____cmpxchg(_u64, ptr, old, new); a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 241 } a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 242 __cmpxchg_called_with_bad_pointer(); a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 243 return old; a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 244 } a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 245 :::::: The code at line 234 was first introduced by commit :::::: a6209d6d71f2ab8c63cc1587ef65490d83022baf alpha: xchg/cmpxchg cleanup and fixes :::::: TO: Ivan Kokshaysky :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests