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| author | Gerd Hoffmann <kraxel@redhat.com> | 2016-05-17 10:54:54 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2016-05-23 14:28:25 +0200 |
| commit | 94ef4f337fb614f18b765a8e0e878a4c23cdedcd (patch) | |
| tree | f75323eba0e7a410a171fae77cca57b9a5f1a54b /tests/test-io-task.c | |
| parent | 6b860806c0dd881373ead661c0f3499eca2c3995 (diff) | |
| download | qemu-94ef4f337fb614f18b765a8e0e878a4c23cdedcd.zip qemu-94ef4f337fb614f18b765a8e0e878a4c23cdedcd.tar.gz qemu-94ef4f337fb614f18b765a8e0e878a4c23cdedcd.tar.bz2 | |
vga: add sr_vbe register set
Commit "fd3c136 vga: make sure vga register setup for vbe stays intact
(CVE-2016-3712)." causes a regression. The win7 installer is unhappy
because it can't freely modify vga registers any more while in vbe mode.
This patch introduces a new sr_vbe register set. The vbe_update_vgaregs
will fill sr_vbe[] instead of sr[]. Normal vga register reads and
writes go to sr[]. Any sr register read access happens through a new
sr() helper function which will read from sr_vbe[] with vbe active and
from sr[] otherwise.
This way we can allow guests update sr[] registers as they want, without
allowing them disrupt vbe video modes that way.
Cc: qemu-stable@nongnu.org
Reported-by: Thomas Lamprecht <thomas@lamprecht.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1463475294-14119-1-git-send-email-kraxel@redhat.com
Diffstat (limited to 'tests/test-io-task.c')
0 files changed, 0 insertions, 0 deletions