lsm: constify the 'file' parameter in security_binder_transfer_file()

SELinux registers the implementation for the "binder_transfer_file"
hook. Looking at the function implementation we observe that the
parameter "file" is not changing.

Mark the "file" parameter of LSM hook security_binder_transfer_file() as
"const" since it will not be changing in the LSM hook.

Signed-off-by: Khadija Kamran <kamrankhadijadj@gmail.com>
[PM: subject line whitespace fix]
Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/security.h b/include/linux/security.h
index 7665f56d920a..dcb3604ffab8 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -269,7 +269,7 @@ int security_binder_transaction(const struct cred *from,
 int security_binder_transfer_binder(const struct cred *from,
 				    const struct cred *to);
 int security_binder_transfer_file(const struct cred *from,
-				  const struct cred *to, struct file *file);
+				  const struct cred *to, const struct file *file);
 int security_ptrace_access_check(struct task_struct *child, unsigned int mode);
 int security_ptrace_traceme(struct task_struct *parent);
 int security_capget(const struct task_struct *target,
@@ -538,7 +538,7 @@ static inline int security_binder_transfer_binder(const struct cred *from,
 
 static inline int security_binder_transfer_file(const struct cred *from,
 						const struct cred *to,
-						struct file *file)
+						const struct file *file)
 {
 	return 0;
 }