10:50 a.m.
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(a)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
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0-DAY CI Kernel Test Service, Intel Corporation
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