bpf: fix leaking uninitialized memory on pop/peek helpers

[linux] / kernel / bpf / queue_stack_maps.c

diff --git a/kernel/bpf/queue_stack_maps.c b/kernel/bpf/queue_stack_maps.c
index 12a93fb..8bbd72d 100644 (file)
--- a/kernel/bpf/queue_stack_maps.c
+++ b/kernel/bpf/queue_stack_maps.c
@@ -122,6 +122,7 @@ static int __queue_map_get(struct bpf_map *map, void *value, bool delete)
        raw_spin_lock_irqsave(&qs->lock, flags);
 
        if (queue_stack_map_is_empty(qs)) {
+               memset(value, 0, qs->map.value_size);
                err = -ENOENT;
                goto out;
        }
@@ -151,6 +152,7 @@ static int __stack_map_get(struct bpf_map *map, void *value, bool delete)
        raw_spin_lock_irqsave(&qs->lock, flags);
 
        if (queue_stack_map_is_empty(qs)) {
+               memset(value, 0, qs->map.value_size);
                err = -ENOENT;
                goto out;
        }