X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fchar%2Fmem.c;h=d78365603952d5b364d1c858bc097933972e4a5a;hb=5a05d9046553c6d85fca860f0b3f76f0c735d0cc;hp=1c8cfa67f7e1f05693db3827b8e21be57699be2d;hpb=a64f41f9bf410e24fe687116ba251b5c5d243830;p=pandora-kernel.git

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 1c8cfa67f7e1..d78365603952 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -325,7 +325,7 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma)
 	phys_addr_t offset = (phys_addr_t)vma->vm_pgoff << PAGE_SHIFT;
 
 	/* It's illegal to wrap around the end of the physical address space. */
-	if (offset + (phys_addr_t)size < offset)
+	if (offset + (phys_addr_t)size - 1 < offset)
 		return -EINVAL;
 
 	if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))