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[S390] oprofile s390: prevent stack corruption

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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 <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2011-04-04 09:43:29 +02:00 committed by Martin Schwidefsky
parent 78fca1b958
commit 65a94b1417
1 changed files with 1 additions and 5 deletions
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6
arch/s390/oprofile/hwsampler.c
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@ -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;
}
/*