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authorMichael S. Tsirkin <mst@redhat.com>2017-04-04 21:04:23 +0300
committerMichael S. Tsirkin <mst@redhat.com>2017-04-10 23:27:50 +0300
commit8f10d0149fb983aa84a02a92f9c2113d69e23cb8 (patch)
tree17826b508a363c624b688d07beccef4aa15020d6 /drivers
parent404a5c392dccf1ebcfc54bc39d2c200eb30f8fff (diff)
downloadlinux-8f10d0149fb983aa84a02a92f9c2113d69e23cb8.tar.xz
Revert "virtio_pci: fix out of bound access for msix_names"
This reverts commit de85ec8b07f82c8c84de7687f769e74bf4c26a1e. Follow-up patches will revert 07ec51480b5e ("virtio_pci: use shared interrupts for virtqueues") that triggered the problem so no need for this one anymore. Tested-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/virtio/virtio_pci_common.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 590534910dc6..df548a6fb844 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -147,7 +147,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
const char *name = dev_name(&vp_dev->vdev.dev);
- int i, j, err = -ENOMEM, allocated_vectors, nvectors;
+ int i, err = -ENOMEM, allocated_vectors, nvectors;
unsigned flags = PCI_IRQ_MSIX;
bool shared = false;
u16 msix_vec;
@@ -212,7 +212,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
if (!vp_dev->msix_vector_map)
goto out_disable_config_irq;
- allocated_vectors = j = 1; /* vector 0 is the config interrupt */
+ allocated_vectors = 1; /* vector 0 is the config interrupt */
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
vqs[i] = NULL;
@@ -236,19 +236,18 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
continue;
}
- snprintf(vp_dev->msix_names[j],
+ snprintf(vp_dev->msix_names[i + 1],
sizeof(*vp_dev->msix_names), "%s-%s",
dev_name(&vp_dev->vdev.dev), names[i]);
err = request_irq(pci_irq_vector(vp_dev->pci_dev, msix_vec),
vring_interrupt, IRQF_SHARED,
- vp_dev->msix_names[j], vqs[i]);
+ vp_dev->msix_names[i + 1], vqs[i]);
if (err) {
/* don't free this irq on error */
vp_dev->msix_vector_map[i] = VIRTIO_MSI_NO_VECTOR;
goto out_remove_vqs;
}
vp_dev->msix_vector_map[i] = msix_vec;
- j++;
/*
* Use a different vector for each queue if they are available,