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
next reply other threads:[~2021-03-15 23:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 23:50 kernel test robot [this message]
2021-03-16 8:27 ` [tip:x86/cpu 2/3] arch/x86/kernel/alternative.c:96:10: warning: Undefined behaviour, pointer arithmetic 'x86nops+10' is out of bounds Borislav Petkov
2021-03-16 9:01 ` Peter Zijlstra
2021-03-16 10:01 ` [kbuild-all] " Rong Chen
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