From adedf2893c192dd09b1cc2f2dcfdd7cad99ec49d Mon Sep 17 00:00:00 2001 From: Andy Lutomirski Date: Sat, 4 Nov 2017 04:19:51 -0700 Subject: selftests/x86/ldt_gdt: Run most existing LDT test cases against the GDT as well Now that the main test infrastructure supports the GDT, run tests that will pass the kernel's GDT permission tests against the GDT. Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/686a1eda63414da38fcecc2412db8dba1ae40581.1509794321.git.luto@kernel.org Signed-off-by: Ingo Molnar --- tools/testing/selftests/x86/ldt_gdt.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'tools/testing/selftests/x86') diff --git a/tools/testing/selftests/x86/ldt_gdt.c b/tools/testing/selftests/x86/ldt_gdt.c index 45f30249133f..3bb42fff5d66 100644 --- a/tools/testing/selftests/x86/ldt_gdt.c +++ b/tools/testing/selftests/x86/ldt_gdt.c @@ -189,7 +189,15 @@ static bool install_valid_mode(const struct user_desc *d, uint32_t ar, static bool install_valid(const struct user_desc *desc, uint32_t ar) { - return install_valid_mode(desc, ar, false, true); + bool ret = install_valid_mode(desc, ar, false, true); + + if (desc->contents <= 1 && desc->seg_32bit && + !desc->seg_not_present) { + /* Should work in the GDT, too. */ + install_valid_mode(desc, ar, false, false); + } + + return ret; } static void install_invalid(const struct user_desc *desc, bool oldmode) -- cgit v1.2.3-59-g8ed1b