linux-4.5-rc3/arch/arc/kernel/unwind.c:629: undefined behaviour ?

[David Binderman]

Hello there,

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> What compiler are you using - for me it builds clean here !

A static C/C++ code analyser called cppcheck. Available from sourceforge.
I find it very useful for all C/C++ development.

Regards

David Binderman

>
> -Vineet
>
> On Monday 08 February 2016 07:07 PM, David Binderman wrote:
>> Hello there,
>>
>> [linux-4.5-rc3/arch/arc/kernel/unwind.c:629]: (warning) Invalid test for overflow 'ptr+len<ptr'. Condition is always false unless there is overflow, and overflow is Undefined Behaviour.
>>
>> Source code is
>>
>> if (ptr + len < ptr || ptr + len> end)
>> return -1;
>>
>> Suggest code rework.
>>
>>
>> Regards
>>
>> David Binderman
>>
>>
>