Re: Random guest crashes since 5c34d002dcc7 ("virtio_pci: use shared interrupts for virtqueues")

[Christoph Hellwig]

Hi Mike,

does the patch below fix that issue for you?

diff --git a/drivers/virtio/virtio_pci_common.c 
b/drivers/virtio/virtio_pci_common.c
index df548a6fb844..fd1b06368b1f 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -176,7 +176,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, 
unsigned nvqs,
        if (err < 0)
                return err;
 
-       vp_dev->msix_vectors = nvectors;
+       vp_dev->msix_vectors = err; /* number of vectors allocated */
        vp_dev->msix_names = kmalloc_array(nvectors,
                        sizeof(*vp_dev->msix_names), GFP_KERNEL);
        if (!vp_dev->msix_names)