On Thu, Apr 23, 2015 at 5:56 AM, Borislav Petkov <b...@alien8.de> wrote: > On Thu, Apr 23, 2015 at 11:20:56AM +0200, Denys Vlasenko wrote: >> * what if %ss before syscall was NOT the usual value of 0x2b, but some >> other segment, not the typical 0-base, 0xffffffff limit 32-bit expand-up one? >> Not restoring proper %ss would not go well. >> [but then, Intel CPUs work, and old code worked....] > > Have we run the exact same reproducer on Intel already? > > Brian, can you run the same thing on an Intel box, if you haven't done > so already? > > Thanks.
Tested it on a Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz and cannot reproduce it there. Note that on Intel CPUs, we use the sysenter VDSO but return with sysret. -- Brian Gerst -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/