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-rw-r--r--drivers/video/gbefb.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c
index bda5e39..ceab370 100644
--- a/drivers/video/gbefb.c
+++ b/drivers/video/gbefb.c
@@ -1016,7 +1016,9 @@ static int gbefb_mmap(struct fb_info *info,
/* check range */
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
return -EINVAL;
- if (offset + size > gbe_mem_size)
+ if (size > gbe_mem_size)
+ return -EINVAL;
+ if (offset > gbe_mem_size - size)
return -EINVAL;
/* remap using the fastest write-through mode on architecture */
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