1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c
index 4fe69ca2448..c04832c4a02 100644
--- a/arch/powerpc/kernel/syscalls.c
+++ b/arch/powerpc/kernel/syscalls.c
@@ -143,6 +143,9 @@ static inline unsigned long do_mmap2(unsigned long addr, size_t len,
         struct file * file = NULL;
         unsigned long ret = -EINVAL;
 
+        if (!arch_validate_prot(prot))
+                goto out;
+
         if (shift) {
                 if (off & ((1 << shift) - 1))
                         goto out;