tree f1b35defb8a47354f105aa4a3f443025131a0273
parent db12451decf7dfe0f083564183e135f2095228b9
author Gerd Hoffmann <kraxel@redhat.com> 1416393462 +0100
committer Gerd Hoffmann <kraxel@redhat.com> 1417425912 +0100

cirrus: fix blit region check

Issues:
 * Doesn't check pitches correctly in case it is negative.
 * Doesn't check width at all.

Turn macro into functions while being at it, also factor out the check
for one region which we then can simply call twice for src + dst.

This is CVE-2014-8106.

Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>