param: fix return value handling in param_set_*

In STANDARD_PARAM_DEF, param_set_* handles the case in which strtolfn returns -EINVAL but it may return -ERANGE. If it returns -ERANGE, param_set_* may set uninitialized value to the paramerter. We should handle both cases. The one of the cases in which strtolfn() returns -ERANGE is following: *Type of module parameter is long *Set the parameter more than LONG_MAX Signed-off-by: Satoru Moriya <[email protected]> Signed-off-by: Rusty Russell <[email protected]>
ambv · Jul 24, 2011 · 81c7413 · 81c7413
1 parent 6d6be43
commit 81c7413
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/kernel/params.c b/kernel/params.c
@@ -225,8 +225,8 @@ int parse_args(const char *name,
 		int ret;						\
 									\
 		ret = strtolfn(val, 0, &l);				\
-		if (ret == -EINVAL || ((type)l != l))			\
-			return -EINVAL;					\
+		if (ret < 0 || ((type)l != l))				\
+			return ret < 0 ? ret : -EINVAL;			\
 		*((type *)kp->arg) = l;					\
 		return 0;						\
 	}								\