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| author | Andrew Cooper <andrew.cooper3@citrix.com> | 2013-10-04 12:24:34 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-10-04 12:24:34 +0200 |
| commit | 7cfb0053629c4dd1a6f01dc43cca7c0c25b8b7bf (patch) | |
| tree | 601e6c122d3e3f97c8da982a28db16f27e9bfba5 /xen/include | |
| parent | 0aa27ce3351f7eb09d13e863a1d5f303086aa32a (diff) | |
| download | xen-7cfb0053629c4dd1a6f01dc43cca7c0c25b8b7bf.tar.gz xen-7cfb0053629c4dd1a6f01dc43cca7c0c25b8b7bf.tar.bz2 xen-7cfb0053629c4dd1a6f01dc43cca7c0c25b8b7bf.zip | |
x86/percpu: Force INVALID_PERCPU_AREA into the non-canonical address region
This causes accidental uses of per_cpu() on a pcpu with an INVALID_PERCPU_AREA
to result in a #GF for attempting to access the middle of the non-canonical
virtual address region.
This is preferable to the current behaviour, where incorrect use of per_cpu()
will result in an effective NULL structure dereference which has security
implication in the context of PV guests.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen/include')
0 files changed, 0 insertions, 0 deletions