[clamav-users] False positive (?) in check6_clamd_vg test

[Arjen de Korte]

Citeren "Micah Snyder (micasnyd)" <micasnyd at cisco.com>:

> Hi Arjen,
>
> I see what you're talking about.  It is a little confounding. We  
> have a valgrind suppression rule for this specific issue:  
> https://github.com/Cisco-Talos/clamav-devel/commit/8cfec0b245abfac9564c11012d67b19da004e927
>
> {
>    binhex-overlapping-memmove
>    Memcheck:Overlap
>    fun:__memcpy_chk
>    fun:memmove
>    fun:cli_binhex
>    ...
> }
>
> Your stack trace has "UnknownInlinedFun " instead of "memmove",  
> which is ... odd.  I suppose feel free to ignore the FP.  Adding  
> another suppression rule with "UnknownInlinedFun" in it doesn't feel  
> good, nor does spending the effort to reimplement without  
> overlapping memmoves.   Thoughts?

Yup. Your mention of the weird "UnknownInlinedFun " tipped me off. We  
use LTO by default in openSUSE Tumbleweed and that seems to be the  
culprit here. Without LTO, the valgrind tests are OK. Apparently LTO  
strips symbols that are needed for valgrind to see what is going on.  
Thanks!