On 26.06.20 04:54, Luis Chamberlain wrote: > On Wed, Jun 24, 2020 at 08:37:55PM +0200, Christian Borntraeger wrote: >> >> >> On 24.06.20 20:32, Christian Borntraeger wrote: >> [...]> >>> 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); >> } >> >> I think. > > Nope, the right form is to check for WIFEXITED() before using WEXITSTATUS(). But this IS a change over the previous code, no? I will test next week as I am travelling right now.
