Messages in this thread | | | Date | Sat, 25 Apr 2015 15:55:25 +0200 | From | Denys Vlasenko <> | Subject | Re: [PATCH] x86, selftests: Add a test for the "sysret_ss_attrs" bug |
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On 04/25/2015 12:09 AM, Andy Lutomirski wrote: > On AMD CPUs, SYSRET can return with a valid SS descriptor with with > the hidden attributes set to an unusable state. Make sure the kernel > doesn't let this happen. This detects an as-yet-unfixed regression. > > Note that the 64-bit version of this test fails on AMD CPUs on all > kernel versions, although the issue in the 64-bit case is much less > severe than in the 32-bit case.
Confirmed to detect the "bug" in 64-bit userspace.
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