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ati-vga: Do not assert on error

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Do not abort on unsupported value just print log and continue. While
display will likely be broken this prevents malicious guest to crash
QEMU causing denial of service.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-id: 0c13dab5d8e3b7e7479c3edbf53aeac8c09de6de.1592737958.git.balaton@eik.bme.hu
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
BALATON Zoltan 2020-06-21 13:12:38 +02:00 • committed by Gerd Hoffmann
parent d634c883ca
commit 41977c65c0
1 changed files with 1 additions and 1 deletions
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2
hw/display/ati.c
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@ -86,8 +86,8 @@ static void ati_vga_switch_mode(ATIVGAState *s)
break;
default:
qemu_log_mask(LOG_UNIMP, "Unsupported bpp value\n");
return;
}
assert(bpp != 0);
DPRINTF("Switching to %dx%d %d %d @ %x\n", h, v, stride, bpp, offs);
vbe_ioport_write_index(&s->vga, 0, VBE_DISPI_INDEX_ENABLE);
vbe_ioport_write_data(&s->vga, 0, VBE_DISPI_DISABLED);