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Commit 65a94b14 authored by Jan Glauber's avatar Jan Glauber Committed by Martin Schwidefsky
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[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: default avatarJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 78fca1b9

arch/s390/oprofile/hwsampler.c

+1 −5
Original line number Original line Diff line number Diff line
@@ -517,12 +517,8 @@ static int stop_sampling(int cpu) 




static int check_hardware_prerequisites(void)

static int check_hardware_prerequisites(void)

{

{

	unsigned long long facility_bits[2];

	if (!test_facility(68))



	memcpy(facility_bits, S390_lowcore.stfle_fac_list, 32);

	if (!(facility_bits[1] & (1ULL << 59)))

		return -EOPNOTSUPP;

		return -EOPNOTSUPP;



	return 0;

	return 0;

}

}

/*

/*