relay: prevent integer overflow in relay_open()

[firefly-linux-kernel-4.4.55.git] / kernel / extable.c

diff --git a/kernel/extable.c b/kernel/extable.c
index c2d625fcda77000d00a397529762bc1426a1d648..5339705b82410515dcadce220ef997930dd3247c 100644 (file)
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -72,6 +72,16 @@ int core_kernel_text(unsigned long addr)
        return 0;
 }
 
+/**
+ * core_kernel_data - tell if addr points to kernel data
+ * @addr: address to test
+ *
+ * Returns true if @addr passed in is from the core kernel data
+ * section.
+ *
+ * Note: On some archs it may return true for core RODATA, and false
+ *  for others. But will always be true for core RW data.
+ */
 int core_kernel_data(unsigned long addr)
 {
        if (addr >= (unsigned long)_sdata &&