diff options
Diffstat (limited to 'kernel/seccomp.c')
| -rw-r--r-- | kernel/seccomp.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c index 0ca6d5243427..39c1c687d8ad 100644 --- a/kernel/seccomp.c +++ b/kernel/seccomp.c @@ -95,13 +95,11 @@ struct seccomp_knotif { * filter->notify_lock. * @next_id: The id of the next request. * @notifications: A list of struct seccomp_knotif elements. - * @wqh: A wait queue for poll. */ struct notification { struct semaphore request; u64 next_id; struct list_head notifications; - wait_queue_head_t wqh; }; /** @@ -117,6 +115,7 @@ struct notification { * @prog: the BPF program to evaluate * @notif: the struct that holds all notification related information * @notify_lock: A lock for all notification-related accesses. + * @wqh: A wait queue for poll if a notifier is in use. * * seccomp_filter objects are organized in a tree linked via the @prev * pointer. For any task, it appears to be a singly-linked list starting @@ -135,6 +134,7 @@ struct seccomp_filter { struct bpf_prog *prog; struct notification *notif; struct mutex notify_lock; + wait_queue_head_t wqh; }; /* Limit any path through the tree to 256KB worth of instructions. */ @@ -502,6 +502,7 @@ static struct seccomp_filter *seccomp_prepare_filter(struct sock_fprog *fprog) } refcount_set(&sfilter->refs, 1); + init_waitqueue_head(&sfilter->wqh); return sfilter; } @@ -774,7 +775,7 @@ static int seccomp_do_user_notification(int this_syscall, list_add(&n.list, &match->notif->notifications); up(&match->notif->request); - wake_up_poll(&match->notif->wqh, EPOLLIN | EPOLLRDNORM); + wake_up_poll(&match->wqh, EPOLLIN | EPOLLRDNORM); mutex_unlock(&match->notify_lock); /* @@ -1098,7 +1099,7 @@ static long seccomp_notify_recv(struct seccomp_filter *filter, unotif.data = *(knotif->data); knotif->state = SECCOMP_NOTIFY_SENT; - wake_up_poll(&filter->notif->wqh, EPOLLOUT | EPOLLWRNORM); + wake_up_poll(&filter->wqh, EPOLLOUT | EPOLLWRNORM); ret = 0; out: mutex_unlock(&filter->notify_lock); @@ -1217,7 +1218,7 @@ static __poll_t seccomp_notify_poll(struct file *file, __poll_t ret = 0; struct seccomp_knotif *cur; - poll_wait(file, &filter->notif->wqh, poll_tab); + poll_wait(file, &filter->wqh, poll_tab); if (mutex_lock_interruptible(&filter->notify_lock) < 0) return EPOLLERR; @@ -1261,7 +1262,6 @@ static struct file *init_listener(struct seccomp_filter *filter) sema_init(&filter->notif->request, 0); filter->notif->next_id = get_random_u64(); INIT_LIST_HEAD(&filter->notif->notifications); - init_waitqueue_head(&filter->notif->wqh); ret = anon_inode_getfile("seccomp notify", &seccomp_notify_ops, filter, O_RDWR); |