[PATCH v9 02/25] ima: Align ima_file_mprotect() definition with LSM infrastructure

[Roberto Sassu]

From: Roberto Sassu <roberto.sa...@huawei.com>

Change ima_file_mprotect() definition, so that it can be registered
as implementation of the file_mprotect hook.

Signed-off-by: Roberto Sassu <roberto.sa...@huawei.com>
Reviewed-by: Stefan Berger <stef...@linux.ibm.com>
Reviewed-by: Casey Schaufler <ca...@schaufler-ca.com>
Reviewed-by: Mimi Zohar <zo...@linux.ibm.com>
---
 include/linux/ima.h               | 5 +++--
 security/integrity/ima/ima_main.c | 6 ++++--
 security/security.c               | 2 +-
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/linux/ima.h b/include/linux/ima.h
index 910a2f11a906..b66353f679e8 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -23,7 +23,8 @@ extern void ima_post_create_tmpfile(struct mnt_idmap *idmap,
 extern void ima_file_free(struct file *file);
 extern int ima_file_mmap(struct file *file, unsigned long reqprot,
                         unsigned long prot, unsigned long flags);
-extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
+extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
+                            unsigned long prot);
 extern int ima_load_data(enum kernel_load_data_id id, bool contents);
 extern int ima_post_load_data(char *buf, loff_t size,
                              enum kernel_load_data_id id, char *description);
@@ -84,7 +85,7 @@ static inline int ima_file_mmap(struct file *file, unsigned 
long reqprot,
 }
 
 static inline int ima_file_mprotect(struct vm_area_struct *vma,
-                                   unsigned long prot)
+                                   unsigned long reqprot, unsigned long prot)
 {
        return 0;
 }
diff --git a/security/integrity/ima/ima_main.c 
b/security/integrity/ima/ima_main.c
index cc1217ac2c6f..b3f5e8401056 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -455,7 +455,8 @@ int ima_file_mmap(struct file *file, unsigned long reqprot,
 /**
  * ima_file_mprotect - based on policy, limit mprotect change
  * @vma: vm_area_struct protection is set to
- * @prot: contains the protection that will be applied by the kernel.
+ * @reqprot: protection requested by the application
+ * @prot: protection that will be applied by the kernel
  *
  * Files can be mmap'ed read/write and later changed to execute to circumvent
  * IMA's mmap appraisal policy rules.  Due to locking issues (mmap semaphore
@@ -465,7 +466,8 @@ int ima_file_mmap(struct file *file, unsigned long reqprot,
  *
  * On mprotect change success, return 0.  On failure, return -EACESS.
  */
-int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot)
+int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
+                     unsigned long prot)
 {
        struct ima_template_desc *template = NULL;
        struct file *file;
diff --git a/security/security.c b/security/security.c
index 013c847b28d0..0608679478ea 100644
--- a/security/security.c
+++ b/security/security.c
@@ -2837,7 +2837,7 @@ int security_file_mprotect(struct vm_area_struct *vma, 
unsigned long reqprot,
        ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot);
        if (ret)
                return ret;
-       return ima_file_mprotect(vma, prot);
+       return ima_file_mprotect(vma, reqprot, prot);
 }
 
 /**
-- 
2.34.1