From 9c70434f825fd0d2e89d1aa0f872159378d0aab3 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Wed, 19 Feb 2014 11:40:17 +0100 Subject: qxl: add sanity check Signed-off-by: Gerd Hoffmann Reviewed-by: Laszlo Ersek --- hw/display/qxl.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'hw/display') diff --git a/hw/display/qxl.c b/hw/display/qxl.c index 1471cc093b..2a559ebcc9 100644 --- a/hw/display/qxl.c +++ b/hw/display/qxl.c @@ -1429,7 +1429,7 @@ static int qxl_destroy_primary(PCIQXLDevice *d, qxl_async_io async) return 1; } -static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm) +static void qxl_set_mode(PCIQXLDevice *d, unsigned int modenr, int loadvm) { pcibus_t start = d->pci.io_regions[QXL_RAM_RANGE_INDEX].addr; pcibus_t end = d->pci.io_regions[QXL_RAM_RANGE_INDEX].size + start; @@ -1439,6 +1439,12 @@ static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm) .mem_start = start, .mem_end = end }; + + if (modenr >= d->modes->n_modes) { + qxl_set_guest_bug(d, "mode number out of range"); + return; + } + QXLSurfaceCreate surface = { .width = mode->x_res, .height = mode->y_res, -- cgit v1.2.1