Messages in this thread | | | Date | Sun, 6 Feb 2005 13:33:55 +0100 | From | Andi Kleen <> | Subject | Re: [PROPOSAL/PATCH] Remove PT_GNU_STACK support before 2.6.11 |
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> Your main objection is that *incorrect* programs that assume they can > execute malloc() code without PROT_EXEC protection. For legacy binaries > keeping this behavior makes sense, no objection from me. > > For newly compiled programs this is just wrong and incorrect.
That's not true as the grub/mono/... experience shows.
> You mention grub (which has RWE and the patch below thus makes that work) > and mono. mono has patches for this on their mailinglist and bugzilla since > 2003 according to google, I'm surprised the novell mono guys haven't fixed > this bug in their code.
There are probably more.
> FWIW all jvm's don't suffer from this. They are either legacy binaries or > mprotect properly (only i386 traditionally had this behavior, all others > already required PROT_EXEC anyway so any half portable app already did this, > as well as any app portable to BSD since they enforce this on x86 as well) > > So I rather see the patch below merged instead; it fixes the worst problems > (RWE not marking the heap executable) while keeping this useful feature > enabled.
It still keeps x86-64 32bit emulation as a proving point for experimental i386 features which is really not its purpose.
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