diff options
| author |   Dave Hansen <dave.hansen@linux.intel.com> | 2018-05-09 10:13:46 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-05-14 11:14:45 +0200 |
| commit | 7e7fd67ca39335a49619729821efb7cbdd674eb0 (patch) | |
| tree | 77b33e8bf7439b62de6b1b5c1d555a3082847709 /tools/testing | |
| parent | x86/pkeys/selftests: Avoid printf-in-signal deadlocks (diff) | |
| download | wireguard-linux-7e7fd67ca39335a49619729821efb7cbdd674eb0.tar.xz wireguard-linux-7e7fd67ca39335a49619729821efb7cbdd674eb0.zip | |
x86/pkeys/selftests: Allow faults on unknown keys
The exec-only pkey is allocated inside the kernel and userspace
is not told what it is. So, allow PK faults to occur that have
an unknown key.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellermen <mpe@ellerman.id.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180509171345.7FC7DA00@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/x86/protection_keys.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/testing/selftests/x86/protection_keys.c b/tools/testing/selftests/x86/protection_keys.c index 5f5aedb80e7b..7d95acd2aec3 100644 --- a/tools/testing/selftests/x86/protection_keys.c +++ b/tools/testing/selftests/x86/protection_keys.c @@ -921,13 +921,21 @@ void *malloc_pkey(long size, int prot, u16 pkey) } int last_pkru_faults; +#define UNKNOWN_PKEY -2 void expected_pk_fault(int pkey) { dprintf2("%s(): last_pkru_faults: %d pkru_faults: %d\n", __func__, last_pkru_faults, pkru_faults); dprintf2("%s(%d): last_si_pkey: %d\n", __func__, pkey, last_si_pkey); pkey_assert(last_pkru_faults + 1 == pkru_faults); - pkey_assert(last_si_pkey == pkey); + + /* + * For exec-only memory, we do not know the pkey in + * advance, so skip this check. + */ + if (pkey != UNKNOWN_PKEY) + pkey_assert(last_si_pkey == pkey); + /* * The signal handler shold have cleared out PKRU to let the * test program continue. We now have to restore it. |