diff options
| author | David Hildenbrand <david@redhat.com> | 2021-09-09 18:22:41 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2021-10-25 09:20:38 +0200 |
| commit | b159f94c86b43cf7e73e654bc527255b1f4eafc4 (patch) | |
| tree | 2c25f796861da3dc1c2f18038edb32b623ea4af3 /tools/perf/scripts/python/libxed.py | |
| parent | 2d8fb8f3914b40e3cc12f8cbb74daefd5245349d (diff) | |
s390/gmap: don't unconditionally call pte_unmap_unlock() in __gmap_zap()
... otherwise we will try unlocking a spinlock that was never locked via a
garbage pointer.
At the time we reach this code path, we usually successfully looked up
a PGSTE already; however, evil user space could have manipulated the VMA
layout in the meantime and triggered removal of the page table.
Fixes: 1e133ab296f3 ("s390/mm: split arch/s390/mm/pgtable.c")
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/20210909162248.14969-3-david@redhat.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/libxed.py')
0 files changed, 0 insertions, 0 deletions