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| author |   Eric Auger <eric.auger@redhat.com> | 2020-11-13 18:52:02 +0100 |
|---|---|---|
| committer |   Alex Williamson <alex.williamson@redhat.com> | 2020-12-02 13:03:12 -0700 |
| commit | 16b8fe4caf499ae8e12d2ab1b1324497e36a7b83 (patch) | |
| tree | 5fc0bc7fedf550da6199caa1cd0467165cabccd1 /drivers/vfio | |
| parent | Linux 5.10-rc6 (diff) | |
| download | linux-dev-16b8fe4caf499ae8e12d2ab1b1324497e36a7b83.tar.xz linux-dev-16b8fe4caf499ae8e12d2ab1b1324497e36a7b83.zip | |
vfio/pci: Move dummy_resources_list init in vfio_pci_probe()
In case an error occurs in vfio_pci_enable() before the call to
vfio_pci_probe_mmaps(), vfio_pci_disable() will try to iterate
on an uninitialized list and cause a kernel panic.
Lets move to the initialization to vfio_pci_probe() to fix the
issue.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Fixes: 05f0c03fbac1 ("vfio-pci: Allow to mmap sub-page MMIO BARs if the mmio page is exclusive")
CC: Stable <stable@vger.kernel.org> # v4.7+
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index e6190173482c..47ebc5c49ca4 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -161,8 +161,6 @@ static void vfio_pci_probe_mmaps(struct vfio_pci_device *vdev) int i; struct vfio_pci_dummy_resource *dummy_res; - INIT_LIST_HEAD(&vdev->dummy_resources_list); - for (i = 0; i < PCI_STD_NUM_BARS; i++) { int bar = i + PCI_STD_RESOURCES; @@ -1966,6 +1964,7 @@ static int vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) mutex_init(&vdev->igate); spin_lock_init(&vdev->irqlock); mutex_init(&vdev->ioeventfds_lock); + INIT_LIST_HEAD(&vdev->dummy_resources_list); INIT_LIST_HEAD(&vdev->ioeventfds_list); mutex_init(&vdev->vma_lock); INIT_LIST_HEAD(&vdev->vma_list); |