Messages in this thread | | | From | Andy Lutomirski <> | Date | Wed, 28 May 2014 14:55:02 -0700 | Subject | Re: [PATCH] x32: Mask away the x32 syscall bit in the ptrace codepath |
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On Wed, May 28, 2014 at 2:53 PM, Philipp Kern <pkern@google.com> wrote: > On Wed, May 28, 2014 at 11:43 PM, Andy Lutomirski <luto@amacapital.net> wrote: >> However: are you sure that entry_64.S handles this? It looks like >> tracesys has higher priority than badsys. And strace can certainly >> see out-of-range syscalls. […] > > Not only can it see them: It must see that this bit is set as that's > the only identifier it has to deduce that the binary is running in x32 > mode. > > Out of range syscall numbers certainly do not work for auditing right > now, hence my attempt to patch around it.
There appears to be a completely arbitrary limit of 32*64 syscalls. There's also an arbitrary limit of 4 arguments. Both are wrong. I have no intention of fixing either.
I'll fix the OOPS, though.
> > Kind regards and thanks > Philipp Kern
-- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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