On 24.06.20 20:32, Christian Borntraeger wrote:
[...]> 

quoted

So the translations look correct. But your change is actually a sematic change
if(ret) will only trigger if there is an error
if (KWIFEXITED(ret)) will always trigger when the process ends. So we will always overwrite -ECHILD
and we did not do it before. 

So the right fix is

diff --git a/kernel/umh.c b/kernel/umh.c
index f81e8698e36e..a3a3196e84d1 100644
--- a/kernel/umh.c
+++ b/kernel/umh.c

@@ -154,7 +154,7 @@ static void call_usermodehelper_exec_sync(struct subprocess_info *sub_info)
                 * the real error code is already in sub_info->retval or
                 * sub_info->retval is 0 anyway, so don't mess with it then.
                 */
-               if (KWIFEXITED(ret))
+               if (KWEXITSTATUS(ret))
                        sub_info->retval = KWEXITSTATUS(ret);
        }