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Diffstat (limited to 'ipc/sem.c')
-rw-r--r--ipc/sem.c5
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);