split cap_mmap_addr() out of cap_file_mmap()

[firefly-linux-kernel-4.4.55.git] / security / commoncap.c

diff --git a/security/commoncap.c b/security/commoncap.c
index e771cb1b2d7947f0c85651b38cc7c9c1d3da11d7..ebac3618896ee12bdbeaedb78cbf1c53caa51553 100644 (file)
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -958,22 +958,15 @@ int cap_vm_enough_memory(struct mm_struct *mm, long pages)
 }
 
 /*
- * cap_file_mmap - check if able to map given addr
- * @file: unused
- * @reqprot: unused
- * @prot: unused
- * @flags: unused
+ * cap_mmap_addr - check if able to map given addr
  * @addr: address attempting to be mapped
- * @addr_only: unused
  *
  * If the process is attempting to map memory below dac_mmap_min_addr they need
  * CAP_SYS_RAWIO.  The other parameters to this function are unused by the
  * capability security module.  Returns 0 if this mapping should be allowed
  * -EPERM if not.
  */
-int cap_file_mmap(struct file *file, unsigned long reqprot,
-                 unsigned long prot, unsigned long flags,
-                 unsigned long addr, unsigned long addr_only)
+int cap_mmap_addr(unsigned long addr)
 {
        int ret = 0;
 
@@ -986,3 +979,24 @@ int cap_file_mmap(struct file *file, unsigned long reqprot,
        }
        return ret;
 }
+
+/*
+ * cap_file_mmap - check if able to map given addr
+ * @file: unused
+ * @reqprot: unused
+ * @prot: unused
+ * @flags: unused
+ * @addr: address attempting to be mapped
+ * @addr_only: unused
+ *
+ * If the process is attempting to map memory below dac_mmap_min_addr they need
+ * CAP_SYS_RAWIO.  The other parameters to this function are unused by the
+ * capability security module.  Returns 0 if this mapping should be allowed
+ * -EPERM if not.
+ */
+int cap_file_mmap(struct file *file, unsigned long reqprot,
+                 unsigned long prot, unsigned long flags,
+                 unsigned long addr, unsigned long addr_only)
+{
+       return cap_mmap_addr(addr);
+}