Re: Synthetic symbol leak in in elf_x86_64_get_synthetic_symtab and elf_read_minimal_symbols

H.J. Lu
2017-08-11T16:44:15Z

On Fri, Aug 11, 2017 at 8:45 AM, Yao Qi <qiyaoltc@gmail.com> wrote:
> On 17-08-11 08:30:21, H.J. Lu wrote:
>> >
>> > We can only safely do this, but .name is leaked for x86_64. Other
>> > tools using bfd, like objdump, nm, and gprof may have this issue too.
>> > I'll ask binutils people on asymbol allocation and de-allocation.
>> >
>>
>> This is:
>>
>> https://sourceware.org/bugzilla/show_bug.cgi?id=21943
>>
>
> I opened it :)
>
>> i386 and x86-64 get_synthetic_symtab don't know if @plt should
>> be added to symbol name for a PLT entry. The first pass checks
>> if @plt is needed and extra space is allocated in the second pass.
>> We can assume @plt is needed and waste some space if it isn't.
>
> Do you plan to fix it?
>

Done.

--
H.J.