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| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2011-04-04 09:43:29 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2011-04-04 09:43:32 +0200 |
| commit | 65a94b1417badaee2ed923fd07e23b651b25c729 (patch) | |
| tree | de16ca3f8edc0f54dbe621ea754bdbd5d4a9bb97 /arch/s390/oprofile | |
| parent | 78fca1b95837a44983608302e89c7258981be9b3 (diff) | |
| download | linux-stable-65a94b1417badaee2ed923fd07e23b651b25c729.tar.gz linux-stable-65a94b1417badaee2ed923fd07e23b651b25c729.tar.bz2 linux-stable-65a94b1417badaee2ed923fd07e23b651b25c729.zip | |
[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 <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/oprofile')
| -rw-r--r-- | arch/s390/oprofile/hwsampler.c | 6 |
1 files changed, 1 insertions, 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 @@ stop_exit: 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; } /* |