fdo-mirrors/mesa-drm
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/drm.git synced 2026-05-06 12:58:06 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add a protective check against a possible buffer overflow

Browse source
This commit is contained in:
Jon Smirl 2004-10-19 18:18:02 +00:00
parent bcfbd73536
commit 157a814be6
1 changed files with 5 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
linux-core/drm_ioctl.c
View file

@ -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);