diff options
| author | BALATON Zoltan <balaton@eik.bme.hu> | 2020-05-16 15:13:03 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2020-05-18 15:39:59 +0200 |
| commit | b0588cb51da6986715294bfec4b52f55612a666e (patch) | |
| tree | bbdedf8ab7e813761813270e690d764ab5b371eb /hw/display | |
| parent | debe78ce14bf8f8940c2bdf3ef387505e9e035a9 (diff) | |
| download | qemu-b0588cb51da6986715294bfec4b52f55612a666e.zip qemu-b0588cb51da6986715294bfec4b52f55612a666e.tar.gz qemu-b0588cb51da6986715294bfec4b52f55612a666e.tar.bz2 | |
ati-vga: Do not allow unaligned access via index register
According to docs bits 1 and 0 of MM_INDEX are hard coded to 0 so
unaligned access via this register should not be possible.
This also fixes problems reported in bug #1878134.
Buglink: https://bugs.launchpad.net/qemu/+bug/1878134
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Tested-by: Alexander Bulekov <alxndr@bu.edu>
Acked-by: Alexander Bulekov <alxndr@bu.edu>
Message-id: 20200516132352.39E9374594E@zero.eik.bme.hu
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/display')
| -rw-r--r-- | hw/display/ati.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/display/ati.c b/hw/display/ati.c index 58ec829..065f197 100644 --- a/hw/display/ati.c +++ b/hw/display/ati.c @@ -511,7 +511,7 @@ static void ati_mm_write(void *opaque, hwaddr addr, } switch (addr) { case MM_INDEX: - s->regs.mm_index = data; + s->regs.mm_index = data & ~3; break; case MM_DATA ... MM_DATA + 3: /* indexed access to regs or memory */ |