diff options
| -rw-r--r-- | ipc/sem.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index 8b929e6a6ed..c8e00f8b4be 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -1450,15 +1450,24 @@ SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsops, } sma = sem_lock(ns, semid); + + /* + * Wait until it's guaranteed that no wakeup_sem_queue_do() is ongoing. + */ + error = get_queue_result(&queue); + + /* + * Array removed? If yes, leave without sem_unlock(). + */ if (IS_ERR(sma)) { error = -EIDRM; goto out_free; } - error = get_queue_result(&queue); /* - * If queue.status != -EINTR we are woken up by another process + * If queue.status != -EINTR we are woken up by another process. + * Leave without unlink_queue(), but with sem_unlock(). */ if (error != -EINTR) { |