1 files changed, 4 insertions, 1 deletions

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 55f2bc09529c..2aeaa2fd4b32 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -162,7 +162,10 @@ asmlinkage unsigned long
 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
           unsigned long flags, unsigned long fd, unsigned long pgoff)
 {
-        return do_mmap2(addr, len, prot, flags, fd, pgoff);
+        if (pgoff & (~PAGE_MASK >> 12))
+                return -EINVAL;
+
+        return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
 }
 
 save_static_function(sys_fork);