From: kernel test robot <lkp@intel.com> To: Peter Zijlstra <peterz@infradead.org> Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, x86@kernel.org, Borislav Petkov <bp@suse.de> Subject: [tip:x86/cpu 2/3] arch/x86/kernel/alternative.c:96:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+10' is out of bounds. Date: Tue, 16 Mar 2021 07:50:10 +0800 [thread overview] Message-ID: <202103160701.3uXlWiWM-lkp@intel.com> (raw) tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/cpu head: 301cddc21a157a3072d789a3097857202e550a24 commit: a89dfde3dc3c2dbf56910af75e2d8b11ec5308f6 [2/3] x86: Remove dynamic NOP selection compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com> cppcheck possible warnings: (new ones prefixed by >>, may not real problems) >> arch/x86/kernel/alternative.c:96:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+10' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4, ^ arch/x86/kernel/alternative.c:97:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+15' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4 + 5, ^ arch/x86/kernel/alternative.c:98:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+21' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4 + 5 + 6, ^ arch/x86/kernel/alternative.c:99:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+28' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4 + 5 + 6 + 7, ^ >> arch/x86/kernel/ftrace.c:304:7: warning: union member 'ftrace_op_code_union::code' is never used. [unusedStructMember] char code[OP_REF_SIZE]; ^ vim +96 arch/x86/kernel/alternative.c 88 89 const unsigned char * const x86_nops[ASM_NOP_MAX+1] = 90 { 91 NULL, 92 x86nops, 93 x86nops + 1, 94 x86nops + 1 + 2, 95 x86nops + 1 + 2 + 3, > 96 x86nops + 1 + 2 + 3 + 4, 97 x86nops + 1 + 2 + 3 + 4 + 5, 98 x86nops + 1 + 2 + 3 + 4 + 5 + 6, 99 x86nops + 1 + 2 + 3 + 4 + 5 + 6 + 7, 100 }; 101 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
WARNING: multiple messages have this Message-ID (diff)
From: kernel test robot <lkp@intel.com> To: kbuild-all@lists.01.org Subject: [tip:x86/cpu 2/3] arch/x86/kernel/alternative.c:96:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+10' is out of bounds. Date: Tue, 16 Mar 2021 07:50:10 +0800 [thread overview] Message-ID: <202103160701.3uXlWiWM-lkp@intel.com> (raw) [-- Attachment #1: Type: text/plain, Size: 1924 bytes --] tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/cpu head: 301cddc21a157a3072d789a3097857202e550a24 commit: a89dfde3dc3c2dbf56910af75e2d8b11ec5308f6 [2/3] x86: Remove dynamic NOP selection compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com> cppcheck possible warnings: (new ones prefixed by >>, may not real problems) >> arch/x86/kernel/alternative.c:96:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+10' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4, ^ arch/x86/kernel/alternative.c:97:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+15' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4 + 5, ^ arch/x86/kernel/alternative.c:98:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+21' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4 + 5 + 6, ^ arch/x86/kernel/alternative.c:99:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+28' is out of bounds. [pointerOutOfBounds] x86nops + 1 + 2 + 3 + 4 + 5 + 6 + 7, ^ >> arch/x86/kernel/ftrace.c:304:7: warning: union member 'ftrace_op_code_union::code' is never used. [unusedStructMember] char code[OP_REF_SIZE]; ^ vim +96 arch/x86/kernel/alternative.c 88 89 const unsigned char * const x86_nops[ASM_NOP_MAX+1] = 90 { 91 NULL, 92 x86nops, 93 x86nops + 1, 94 x86nops + 1 + 2, 95 x86nops + 1 + 2 + 3, > 96 x86nops + 1 + 2 + 3 + 4, 97 x86nops + 1 + 2 + 3 + 4 + 5, 98 x86nops + 1 + 2 + 3 + 4 + 5 + 6, 99 x86nops + 1 + 2 + 3 + 4 + 5 + 6 + 7, 100 }; 101 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2021-03-15 23:51 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-15 23:50 kernel test robot [this message] 2021-03-15 23:50 ` [tip:x86/cpu 2/3] arch/x86/kernel/alternative.c:96:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+10' is out of bounds kernel test robot 2021-03-16 8:27 ` Borislav Petkov 2021-03-16 8:27 ` Borislav Petkov 2021-03-16 9:01 ` Peter Zijlstra 2021-03-16 9:01 ` Peter Zijlstra 2021-03-16 10:01 ` [kbuild-all] " Rong Chen 2021-03-16 10:01 ` Rong Chen
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