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diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
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index 6c80083..77cc85d 100644
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--- a/fs/notify/fanotify/fanotify_user.c
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+++ b/fs/notify/fanotify/fanotify_user.c
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@@ -122,6 +122,7 @@ static int fill_event_metadata(struct fsnotify_group *group,
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 	metadata->event_len = FAN_EVENT_METADATA_LEN;
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 	metadata->metadata_len = FAN_EVENT_METADATA_LEN;
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 	metadata->vers = FANOTIFY_METADATA_VERSION;
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+	metadata->reserved = 0;
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 	metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS;
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 	metadata->pid = pid_vnr(event->tgid);
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 	if (unlikely(event->mask & FAN_Q_OVERFLOW))
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