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linux-sg2042
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-2.6 

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/drm-2.6:
  drm: Copy back ioctl data to userspace regardless of return code.
  drm: Round size of SHM maps to PAGE_SIZE
This commit is contained in:
Linus Torvalds 2009-05-20 16:40:24 -07:00
parent a9523f4526 9b6fe313bf
commit 5805977e63
2 changed files with 9 additions and 1 deletions
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8
drivers/gpu/drm/drm_bufs.c
View File

@ -170,6 +170,14 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
}
DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
(unsigned long long)map->offset, map->size, map->type);
/* page-align _DRM_SHM maps. They are allocated here so there is no security
* hole created by that and it works around various broken drivers that use
* a non-aligned quantity to map the SAREA. --BenH
*/
if (map->type == _DRM_SHM)
map->size = PAGE_ALIGN(map->size);
if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
return -EINVAL;

2
drivers/gpu/drm/drm_drv.c
View File

@ -481,7 +481,7 @@ int drm_ioctl(struct inode *inode, struct file *filp,
}
retcode = func(dev, kdata, file_priv);
if ((retcode == 0) && (cmd & IOC_OUT)) {
if (cmd & IOC_OUT) {
if (copy_to_user((void __user *)arg, kdata,
_IOC_SIZE(cmd)) != 0)
retcode = -EFAULT;