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| author | David Hildenbrand <[email protected]> | 2021-09-09 16:22:41 +0000 |
|---|---|---|
| committer | Christian Borntraeger <[email protected]> | 2021-10-25 07:20:38 +0000 |
| commit | b159f94c86b43cf7e73e654bc527255b1f4eafc4 (patch) | |
| tree | 2c25f796861da3dc1c2f18038edb32b623ea4af3 /scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h | |
| parent | s390/gmap: validate VMA in __gmap_zap() (diff) | |
| download | kernel-b159f94c86b43cf7e73e654bc527255b1f4eafc4.tar.gz kernel-b159f94c86b43cf7e73e654bc527255b1f4eafc4.zip | |
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 <[email protected]>
Reviewed-by: Claudio Imbrenda <[email protected]>
Acked-by: Heiko Carstens <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Borntraeger <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h')
0 files changed, 0 insertions, 0 deletions