[PATCH] mprotect segments with extra PROT_WRITE bit when DT_TEXTREL bit is set

[Fangrui Song]

On 2018-08-29, Florian Weimer wrote:
>On 08/23/2018 07:52 AM, Fangrui Song wrote:
>>
>> Â Â Â Â * elf/dl-reloc.c (_dl_relocate_object): __mprotect with extra
>> Â Â Â Â PROT_WRITE bit.
>
>This needs a bug in Bugzilla (is it bug 20480?), reference in the 
>ChangeLog entry, and, ideally, a regression test.
>
>I can see that the current code has a problem, but I assume we do 
>things this way because we want to create an RWX mapping, even 
>temporarily. System security policy may prevent the creation of such 
>mappings.  We would have have to flip between RW and RWX protection 
>flags around IFUNC handlers to fix that.
>
>Thanks,
>Florian

Thank you for referring to 20480! I have replied there.



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