diff options
Diffstat (limited to 'drivers/video/vfb.c')
| -rw-r--r-- | drivers/video/vfb.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/video/vfb.c b/drivers/video/vfb.c index 8bc1f939894..ee5985efa15 100644 --- a/drivers/video/vfb.c +++ b/drivers/video/vfb.c @@ -420,9 +420,12 @@ static int vfb_mmap(struct fb_info *info, 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; |