mirror of https://github.com/xemu-project/xemu.git
s390-virtio: Check for NULL device in reset hypercall
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 baf0b55a9e
(Implement
virtio reset).
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -86,6 +86,9 @@ static int s390_virtio_hcall_reset(const uint64_t *args)
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VirtIOS390Device *dev;
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VirtIOS390Device *dev;
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dev = s390_virtio_bus_find_mem(s390_bus, mem);
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dev = s390_virtio_bus_find_mem(s390_bus, mem);
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if (dev == NULL) {
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return -EINVAL;
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}
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virtio_reset(dev->vdev);
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virtio_reset(dev->vdev);
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
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stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
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s390_virtio_device_sync(dev);
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s390_virtio_device_sync(dev);
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