Re: [PATCH] bogus sigaltstack calls by rt_sigreturn

[Andi Kleen]

Roland McGrath <roland@xxxxxxxxxx> writes:

> There is a longstanding bug in the rt_sigreturn system call.
> This exists in both 2.4 and 2.6, and for almost every platform.

I don't think the patch is really needed on x86-64 because the
kernel address should always return -EFAULT in access_ok().

Too bad, there are definitely some mysterious 32bit signal
failures left, e.g. newer valgrind still doesn't work reliable.

-Andi

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