diff options
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_core.c')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_core.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 65cbada3ec13..1929103ee59a 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -958,24 +958,17 @@ static int vfio_pci_ioctl_get_info(struct vfio_pci_core_device *vdev, struct vfio_device_info __user *arg) { unsigned long minsz = offsetofend(struct vfio_device_info, num_irqs); - struct vfio_device_info info; + struct vfio_device_info info = {}; struct vfio_info_cap caps = { .buf = NULL, .size = 0 }; - unsigned long capsz; int ret; - /* For backward compatibility, cannot require this */ - capsz = offsetofend(struct vfio_iommu_type1_info, cap_offset); - if (copy_from_user(&info, arg, minsz)) return -EFAULT; if (info.argsz < minsz) return -EINVAL; - if (info.argsz >= capsz) { - minsz = capsz; - info.cap_offset = 0; - } + minsz = min_t(size_t, info.argsz, sizeof(info)); info.flags = VFIO_DEVICE_FLAGS_PCI; |