diff options
| -rw-r--r-- | linux-core/drm_ioctl.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/linux-core/drm_ioctl.c b/linux-core/drm_ioctl.c index bd64ffdf..b7b97539 100644 --- a/linux-core/drm_ioctl.c +++ b/linux-core/drm_ioctl.c @@ -135,16 +135,19 @@ int drm_setunique(struct inode *inode, struct file *filp, static int drm_set_busid(drm_device_t * dev) { + int len; if (dev->unique != NULL) return EBUSY; - dev->unique_len = 20; + dev->unique_len = 40; dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER); if (dev->unique == NULL) return ENOMEM; - snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", + len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); + if (len > dev->unique_len) + DRM_ERROR("buffer overflow"); dev->devname = drm_alloc(strlen(dev->pdev->driver->name) + dev->unique_len + 2, DRM_MEM_DRIVER); |