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).
Cc: qemu-sta...@nongnu.org
Signed-off-by: Andreas Färber <afaer...@suse.de>
---
hw/s390-virtio.c | 3 +++
1 Datei geändert, 3 Zeilen hinzugefügt(+)
diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c
index 5edaabb..5d48aba 100644
--- a/hw/s390-virtio.c
+++ b/hw/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);
--
1.7.10.4
