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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-05-21 01:40:24 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-05-21 01:40:24 +0200 |
| commit | 5805977e63a36ad56594a623f3bd2bebcb7db233 (patch) | |
| tree | 8853fa72c4b5a8e27a03782bca0a7d2d5b3f89f4 /drivers | |
| parent | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus (diff) | |
| parent | drm: Copy back ioctl data to userspace regardless of return code. (diff) | |
| download | linux-5805977e63a36ad56594a623f3bd2bebcb7db233.tar.xz linux-5805977e63a36ad56594a623f3bd2bebcb7db233.zip | |
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
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_bufs.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_drv.c | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c index 6d80d17f1e96..0411d912d82a 100644 --- a/drivers/gpu/drm/drm_bufs.c +++ b/drivers/gpu/drm/drm_bufs.c @@ -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; diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index f01def16a669..019b7c578236 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -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; |