apparmor: fix arg_size computation for when setprocattr is null termi…

…nated Signed-off-by: John Johansen <[email protected]>
chewitt · Jul 12, 2016 · d4d03f7 · d4d03f7
1 parent e89b808
commit d4d03f7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
@@ -529,7 +529,7 @@ static int apparmor_setprocattr(struct task_struct *task, char *name,
 	if (!*args)
 		goto out;
 
-	arg_size = size - (args - (char *) value);
+	arg_size = size - (args - (largs ? largs : (char *) value));
 	if (strcmp(name, "current") == 0) {
 		if (strcmp(command, "changehat") == 0) {
 			error = aa_setprocattr_changehat(args, arg_size,