From ab290630fad0df42ee94a81b20c48d0da2dc6f66 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andreas=20F=C3=A4rber?= Date: Tue, 22 Jan 2013 23:24:08 +0000 Subject: s390-virtio: Check for NULL device in reset hypercall MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit s390_virtio_bus_find_mem() may return a NULL VirtIOS390Device. If called with, e.g., args[0] == 0, this leads to a segfault. Fix this by adding error handling as done for other hypercalls. Present since baf0b55a9e57b909b1f8b0f732c0b10242867418 (Implement virtio reset). Signed-off-by: Andreas Färber Signed-off-by: Alexander Graf --- hw/s390x/s390-virtio.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'hw/s390x/s390-virtio.c') diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c index a8a489dc3e..2a1d9ac2da 100644 --- a/hw/s390x/s390-virtio.c +++ b/hw/s390x/s390-virtio.c @@ -86,6 +86,9 @@ static int s390_virtio_hcall_reset(const uint64_t *args) VirtIOS390Device *dev; dev = s390_virtio_bus_find_mem(s390_bus, mem); + if (dev == NULL) { + return -EINVAL; + } virtio_reset(dev->vdev); stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0); s390_virtio_device_sync(dev); -- cgit v1.2.1