diff options
Diffstat (limited to 'drivers/video/smscufx.c')
| -rw-r--r-- | drivers/video/smscufx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/video/smscufx.c b/drivers/video/smscufx.c index 97bd6620c364..b2b33fc1ac3f 100644 --- a/drivers/video/smscufx.c +++ b/drivers/video/smscufx.c @@ -782,7 +782,11 @@ static int ufx_ops_mmap(struct fb_info *info, struct vm_area_struct *vma) unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; unsigned long page, pos; - if (offset + size > info->fix.smem_len) + if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) + return -EINVAL; + if (size > info->fix.smem_len) + return -EINVAL; + if (offset > info->fix.smem_len - size) return -EINVAL; pos = (unsigned long)info->fix.smem_start + offset; |