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vga: fix display update region calculation 

vga display update mis-calculated the region for the dirty bitmap
snapshot in case the scanlines are padded.  This can triggere an
assert in cpu_physical_memory_snapshot_get_dirty().

Fixes: fec5e8c92b
Reported-by: Kevin Wolf <kwolf@redhat.com>
Reported-by: 李强 <liqiang6-s@360.cn>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170509104839.19415-1-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-05-09 12:48:39 +02:00
parent ca7f544123
commit bfc56535f7
1 changed files with 1 additions and 1 deletions
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2
hw/display/vga.c
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@ -1630,7 +1630,7 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
if (!full_update) {
vga_sync_dirty_bitmap(s);
snap = memory_region_snapshot_and_clear_dirty(&s->vram, addr1,
bwidth * height,
line_offset * height,
DIRTY_MEMORY_VGA);
}