diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index c6579067eeea..6e7e57360b81 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -694,6 +694,7 @@ static void bpf_map_free_deferred(struct work_struct *work) { struct bpf_map *map = container_of(work, struct bpf_map, work); struct btf_record *rec = map->record; + struct btf *btf = map->btf; security_bpf_map_free(map); bpf_map_release_memcg(map); @@ -709,6 +710,10 @@ static void bpf_map_free_deferred(struct work_struct *work) * template bpf_map struct used during verification. */ btf_record_free(rec); + /* Delay freeing of btf for maps, as map_free callback may need + * struct_meta info which will be freed with btf_put(). + */ + btf_put(btf); } static void bpf_map_put_uref(struct bpf_map *map) @@ -749,7 +754,6 @@ void bpf_map_put(struct bpf_map *map) if (atomic64_dec_and_test(&map->refcnt)) { /* bpf_map_free_id() must be called first */ bpf_map_free_id(map); - btf_put(map->btf); if (READ_ONCE(map->free_after_mult_rcu_gp)) call_rcu_tasks_trace(&map->rcu, bpf_map_free_mult_rcu_gp);