1 files changed, 13 insertions, 3 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 6d9521636aaa..10d493fea7ce 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1460,11 +1460,21 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
                 current->fsuid = 0;     /* Dump root private */
         }
         mm->dumpable = 0;
-        init_completion(&mm->core_done);
+
+        retval = -EAGAIN;
         spin_lock_irq(&current->sighand->siglock);
-        current->signal->flags = SIGNAL_GROUP_EXIT;
-        current->signal->group_exit_code = exit_code;
+        if (!(current->signal->flags & SIGNAL_GROUP_EXIT)) {
+                current->signal->flags = SIGNAL_GROUP_EXIT;
+                current->signal->group_exit_code = exit_code;
+                retval = 0;
+        }
         spin_unlock_irq(&current->sighand->siglock);
+        if (retval) {
+                up_write(&mm->mmap_sem);
+                goto fail;
+        }
+
+        init_completion(&mm->core_done);
         coredump_wait(mm);
 
         /*