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Re: [PATCH 2/4] S390: Use own tbegin macro instead of __builtin_tbegin.
On Fri, 2017-01-13 at 17:22 +0100, Stefan Liebler wrote:
> On 01/13/2017 04:32 PM, Torvald Riegel wrote:
> > Anyway, I'm not sure whether this gives user code more means to exploit
> > or probe something, or not. Maybe I was just too cautious here.
> >
> >
> That's correct, you can probe something.
> But if someone wants to do that, he can also start a transaction
> directly without pthread_mutex_lock.
True, but it might be easier for an exploit to set up a call to existing
code than to either build binary code that starts transactions or find
suitable binary code elsewhere.