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| author |   Nico Boehr <nrb@linux.ibm.com> | 2022-05-24 15:43:20 +0200 |
|---|---|---|
| committer |   Heiko Carstens <hca@linux.ibm.com> | 2022-05-25 11:46:02 +0200 |
| commit | c9bfb460c3e4da2462e16b0f0b200990b36b1dd2 (patch) | |
| tree | 9b33bc979aa4ba843702e43862a29ea26f77df15 /arch/s390/Kconfig | |
| parent | s390: generate register offsets into pt_regs automatically (diff) | |
| download | linux-dev-c9bfb460c3e4da2462e16b0f0b200990b36b1dd2.tar.xz linux-dev-c9bfb460c3e4da2462e16b0f0b200990b36b1dd2.zip | |
s390/perf: obtain sie_block from the right address
Since commit 1179f170b6f0 ("s390: fix fpu restore in entry.S"), the
sie_block pointer is located at empty1[1], but in sie_block() it was
taken from empty1[0].
This leads to a random pointer being dereferenced, possibly causing
system crash.
This problem can be observed when running a simple guest with an endless
loop and recording the cpu-clock event:
sudo perf kvm --guestvmlinux=<guestkernel> --guest top -e cpu-clock
With this fix, the correct guest address is shown.
Fixes: 1179f170b6f0 ("s390: fix fpu restore in entry.S")
Cc: stable@vger.kernel.org
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions