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From c5e26182fedef98b73f50e9fac3ae09696e59880 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Wed, 26 Feb 2014 11:44:47 +0100
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Subject: [PATCH 2/6] qxl: add sanity check
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RH-Author: Gerd Hoffmann <kraxel@redhat.com>
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Message-id: <1393415087-3776-2-git-send-email-kraxel@redhat.com>
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Patchwork-id: 57815
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O-Subject: [RHEL-7 qemu-kvm PATCH 1/1] qxl: add sanity check
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Bugzilla: 751937
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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(cherry picked from commit 9c70434f825fd0d2e89d1aa0f872159378d0aab3)
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---
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hw/display/qxl.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/display/qxl.c | 8 +++++++-
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1 files changed, 7 insertions(+), 1 deletions(-)
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diff --git a/hw/display/qxl.c b/hw/display/qxl.c
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index 4381d97..4fe4f1b 100644
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--- a/hw/display/qxl.c
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+++ b/hw/display/qxl.c
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@@ -1417,7 +1417,7 @@ static int qxl_destroy_primary(PCIQXLDevice *d, qxl_async_io async)
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return 1;
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}
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-static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm)
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+static void qxl_set_mode(PCIQXLDevice *d, unsigned int modenr, int loadvm)
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{
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pcibus_t start = d->pci.io_regions[QXL_RAM_RANGE_INDEX].addr;
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pcibus_t end = d->pci.io_regions[QXL_RAM_RANGE_INDEX].size + start;
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@@ -1427,6 +1427,12 @@ static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm)
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.mem_start = start,
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.mem_end = end
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};
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+
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+ if (modenr >= d->modes->n_modes) {
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+ qxl_set_guest_bug(d, "mode number out of range");
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+ return;
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+ }
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+
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QXLSurfaceCreate surface = {
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.width = mode->x_res,
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.height = mode->y_res,
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--
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1.7.1
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