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| author | Gonglei <arei.gonglei@huawei.com> | 2015-06-23 09:53:04 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-06-23 08:14:13 +0200 |
| commit | 3750dabc69d76f0938cc726a64a70e4ae2fe21df (patch) | |
| tree | c8b98af13875108b8cb9a4c8f92e443db233d3b4 | |
| parent | 0c8ff723bd29e5c8b2ca989f857ae5c37ec49c4e (diff) | |
| download | hqemu-3750dabc69d76f0938cc726a64a70e4ae2fe21df.zip hqemu-3750dabc69d76f0938cc726a64a70e4ae2fe21df.tar.gz | |
virito-pci: fix OVERRUN problem
Overrunning array "proxy->guest_features" of 2 4-byte
elements at element index 2 (byte offset 8) using index
"proxy->gfselect" (which evaluates to 2). Normally, the
Linux kernel driver just read/write '0' or '1' as the
"proxy->gfselect" values, so using '<' instead of '=<' to
make coverity happy and avoid potential harm.
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | hw/virtio/virtio-pci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index d7cf34c..ce1c46e 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -977,7 +977,7 @@ static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, val = proxy->gfselect; break; case VIRTIO_PCI_COMMON_GF: - if (proxy->gfselect <= ARRAY_SIZE(proxy->guest_features)) { + if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) { val = proxy->guest_features[proxy->gfselect]; } break; @@ -1052,7 +1052,7 @@ static void virtio_pci_common_write(void *opaque, hwaddr addr, proxy->gfselect = val; break; case VIRTIO_PCI_COMMON_GF: - if (proxy->gfselect <= ARRAY_SIZE(proxy->guest_features)) { + if (proxy->gfselect < ARRAY_SIZE(proxy->guest_features)) { proxy->guest_features[proxy->gfselect] = val; virtio_set_features(vdev, (((uint64_t)proxy->guest_features[1]) << 32) | |
