1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index dfeadf466f18..b25802065031 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1116,6 +1116,9 @@ static task_t *copy_process(unsigned long clone_flags,
                         __get_cpu_var(process_counts)++;
         }
 
+        if (!current->signal->tty && p->signal->tty)
+                p->signal->tty = NULL;
+
         nr_threads++;
         total_forks++;
         write_unlock_irq(&tasklist_lock);