1 files changed, 7 insertions, 0 deletions

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index ddde0ef9ccdc..b4f1674fca79 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -27,6 +27,10 @@ static int irq_affinity_read_proc(char *page, char **start, off_t off,
         return len;
 }
 
+#ifndef is_affinity_mask_valid
+#define is_affinity_mask_valid(val) 1
+#endif
+
 int no_irq_affinity;
 static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
                                    unsigned long count, void *data)
@@ -42,6 +46,9 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
         if (err)
                 return err;
 
+        if (!is_affinity_mask_valid(new_value))
+                return -EINVAL;
+
         /*
          * Do not allow disabling IRQs completely - it's a too easy
          * way to make the system unusable accidentally :-) At least