Btrfs: Prevent root_list corruption

[cascardo/linux.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index 92ce83a..153dee1 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1915,7 +1915,6 @@ static int coredump_wait(int exit_code, struct core_state *core_state)
 {
        struct task_struct *tsk = current;
        struct mm_struct *mm = tsk->mm;
-       struct completion *vfork_done;
        int core_waiters = -EBUSY;
 
        init_completion(&core_state->startup);
@@ -1927,22 +1926,9 @@ static int coredump_wait(int exit_code, struct core_state *core_state)
                core_waiters = zap_threads(tsk, mm, core_state, exit_code);
        up_write(&mm->mmap_sem);
 
-       if (unlikely(core_waiters < 0))
-               goto fail;
-
-       /*
-        * Make sure nobody is waiting for us to release the VM,
-        * otherwise we can deadlock when we wait on each other
-        */
-       vfork_done = tsk->vfork_done;
-       if (vfork_done) {
-               tsk->vfork_done = NULL;
-               complete(vfork_done);
-       }
-
-       if (core_waiters)
+       if (core_waiters > 0)
                wait_for_completion(&core_state->startup);
-fail:
+
        return core_waiters;
 }