BACKPORT: security: fix typo in security_task_prctl

Signed-off-by: Jann Horn <jann@thejh.net>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit b7f76ea2ef6739ee484a165ffbac98deb855d3d3)

Test: Builds.
Change-Id: I82af635911604380e135d54edff38bad4f04eaa8
Signed-off-by: Jorge Lucangeli Obes <jorgelo@google.com>
diff --git a/include/linux/security.h b/include/linux/security.h
index 18264ea..5d45b4f 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -2527,7 +2527,7 @@
 				      unsigned long arg4,
 				      unsigned long arg5)
 {
-	return cap_task_prctl(option, arg2, arg3, arg3, arg5);
+	return cap_task_prctl(option, arg2, arg3, arg4, arg5);
 }
 
 static inline void security_task_to_inode(struct task_struct *p, struct inode *inode)