diff options
| author | Eric Auger <eric.auger@redhat.com> | 2020-11-13 18:52:02 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-06 14:44:59 +0100 |
| commit | 706a63e840d0ab86ecba189277f22f82e5356c63 (patch) | |
| tree | 385738872c80cd8b835e96ba466453e59745a97e | |
| parent | 5664f1cb0855ff4e1855d358ed68e494ceb451d5 (diff) | |
| download | linux-stable-706a63e840d0ab86ecba189277f22f82e5356c63.tar.gz linux-stable-706a63e840d0ab86ecba189277f22f82e5356c63.tar.bz2 linux-stable-706a63e840d0ab86ecba189277f22f82e5356c63.zip | |
vfio/pci: Move dummy_resources_list init in vfio_pci_probe()
[ Upstream commit 16b8fe4caf499ae8e12d2ab1b1324497e36a7b83 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 5e23e4aa5b0a..c48e1d84efb6 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -118,8 +118,6 @@ static void vfio_pci_probe_mmaps(struct vfio_pci_device *vdev) int bar; struct vfio_pci_dummy_resource *dummy_res; - INIT_LIST_HEAD(&vdev->dummy_resources_list); - for (bar = PCI_STD_RESOURCES; bar <= PCI_STD_RESOURCE_END; bar++) { res = vdev->pdev->resource + bar; @@ -1522,6 +1520,7 @@ 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); |