Re: [PATCH] x86-64, vsyscalls: Rename UNSAFE_VSYSCALLS toCOMPAT_VSYSCALLS

[Ingo Molnar]

* pageexec@xxxxxxxxxxx <pageexec@xxxxxxxxxxx> wrote:

> On 7 Jun 2011 at 11:56, Ingo Molnar wrote:
> 
> > Fedora was able to disable the fixed-address vdso in its newer 32-bit 
> > distro kernels because it *upgraded glibc*.
> 
> and what happened to those apps that users statically linked against
> the older glibc? what happened to their chroots that had dynamically
> linked binaries with an older glibc? did you not break those either?

There's two reasons why a distributor will generally not worry about 
that case:

 - No such binaries come with a default distro install

 - Keeping such old libraries linked or chrooted can be a security
   hole in itself, so i dou guarantee something like this.

If another distribution considers this a serious enough issue it can 
keep the COMPAT_VDSO option enabled forever. Few (none?) did.

Thanks,

	Ingo
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