call_usermodehelper: UMH_WAIT_EXEC ignores kernel_thread() failure

UMH_WAIT_EXEC should report the error if kernel_thread() fails, like
UMH_WAIT_PROC does.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/kmod.c b/kernel/kmod.c
index ad9f2edebd67..6e9b19667a8d 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -235,10 +235,10 @@ static void __call_usermodehelper(struct work_struct *work)
         case UMH_WAIT_PROC:
                 if (pid > 0)
                         break;
-                sub_info->retval = pid;
                 /* FALLTHROUGH */
-
         case UMH_WAIT_EXEC:
+                if (pid < 0)
+                        sub_info->retval = pid;
                 complete(sub_info->complete);
         }
 }