diff options
| -rw-r--r-- | ipc/sem.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index 5cf7b4c093b3..8f5aa34f8d30 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -322,7 +322,6 @@ static inline struct sem_array *sem_obtain_object_check(struct ipc_namespace *ns static inline void sem_lock_and_putref(struct sem_array *sma) { - rcu_read_lock(); sem_lock(sma, NULL, -1); ipc_rcu_putref(sma); } @@ -1117,6 +1116,7 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum, return -ENOMEM; } + rcu_read_lock(); sem_lock_and_putref(sma); if (sma->sem_perm.deleted) { sem_unlock(sma, -1); @@ -1166,6 +1166,7 @@ static int semctl_main(struct ipc_namespace *ns, int semid, int semnum, goto out_free; } } + rcu_read_lock(); sem_lock_and_putref(sma); if (sma->sem_perm.deleted) { sem_unlock(sma, -1); @@ -1451,7 +1452,7 @@ static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid) } /* step 3: Acquire the lock on semaphore array */ - /* This also does the rcu_read_lock() */ + rcu_read_lock(); sem_lock_and_putref(sma); if (sma->sem_perm.deleted) { sem_unlock(sma, -1); |