KVM: s390/mm: try a cow on read only pages for key ops

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The PFMF instruction handler  blindly wrote the storage key even if
the page was mapped R/O in the host. Lets try a COW before continuing
and bail out in case of errors.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org

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Christian Borntraeger 2014-08-19 16:19:35 +02:00

parent 614a80e474

commit ab3f285f22

1 changed files with 10 additions and 0 deletions

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arch/s390/mm/pgtable.c

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