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-rw-r--r--arch/powerpc/kernel/rtas.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index caffb10e7aa3..5607693f35cf 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -1041,6 +1041,9 @@ asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
+ if (!rtas.entry)
+ return -EINVAL;
+
if (copy_from_user(&args, uargs, 3 * sizeof(u32)) != 0)
return -EFAULT;