selftests/x86/fsgsbase: Test ptracer-induced GSBASE write

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The test validates that the selector is not changed when a ptracer writes
the ptracee's GSBASE.

Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Link: https://lkml.kernel.org/r/1557309753-24073-3-git-send-email-chang.seok.bae@intel.com

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Chang S. Bae 2019-05-08 03:02:17 -07:00 • committed by Thomas Gleixner

parent 48f5e52e91

commit 1b6858d5a2

1 changed files with 70 additions and 0 deletions

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tools/testing/selftests/x86/fsgsbase.c

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