From 65a94b1417badaee2ed923fd07e23b651b25c729 Mon Sep 17 00:00:00 2001 From: Jan Glauber Date: Mon, 4 Apr 2011 09:43:29 +0200 Subject: [PATCH] [S390] oprofile s390: prevent stack corruption Prevent stack corruption by memcpy which copies more bytes then available at the destination. While at it use the new test_facility to test for the facility bit. Signed-off-by: Jan Glauber Signed-off-by: Martin Schwidefsky --- arch/s390/oprofile/hwsampler.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c index 3d48f4db246d..4952872d6f0a 100644 --- a/arch/s390/oprofile/hwsampler.c +++ b/arch/s390/oprofile/hwsampler.c @@ -517,12 +517,8 @@ static int stop_sampling(int cpu) static int check_hardware_prerequisites(void) { - unsigned long long facility_bits[2]; - - memcpy(facility_bits, S390_lowcore.stfle_fac_list, 32); - if (!(facility_bits[1] & (1ULL << 59))) + if (!test_facility(68)) return -EOPNOTSUPP; - return 0; } /*