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selftests/x86/ldt_gdt: Run most existing LDT test cases against the GDT as well

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commit adedf2893c192dd09b1cc2f2dcfdd7cad99ec49d upstream.

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 <luto@kernel.org>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/686a1eda63414da38fcecc2412db8dba1ae40581.1509794321.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Lutomirski 2017-11-04 04:19:51 -07:00 committed by Greg Kroah-Hartman
parent 46e6a15b40
commit 4a464a66db
1 changed files with 9 additions and 1 deletions
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10
tools/testing/selftests/x86/ldt_gdt.c
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@ -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)