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authorAndrey Ignatov <rdna@fb.com>2020-06-11 17:08:57 -0700
committerAlexei Starovoitov <ast@kernel.org>2020-06-12 15:21:29 -0700
commit60e5ca8a64bad8f3e2e20a1e57846e497361c700 (patch)
tree2ea585b365400086452e0f5352bf893fb693777f
parentf6fede8569689dd31e7b0ed15024b25e5ce2e2e5 (diff)
downloadlinux-60e5ca8a64bad8f3e2e20a1e57846e497361c700.tar.gz
bpf: Fix memlock accounting for sock_hash
Add missed bpf_map_charge_init() in sock_hash_alloc() and correspondingly bpf_map_charge_finish() on ENOMEM. It was found accidentally while working on unrelated selftest that checks "map->memory.pages > 0" is true for all map types. Before: # bpftool m l ... 3692: sockhash name m_sockhash flags 0x0 key 4B value 4B max_entries 8 memlock 0B After: # bpftool m l ... 84: sockmap name m_sockmap flags 0x0 key 4B value 4B max_entries 8 memlock 4096B Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Signed-off-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200612000857.2881453-1-rdna@fb.com
-rw-r--r--net/core/sock_map.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index a2dc64d..4059f94 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -991,11 +991,15 @@ static struct bpf_map *sock_hash_alloc(union bpf_attr *attr)
err = -EINVAL;
goto free_htab;
}
+ err = bpf_map_charge_init(&htab->map.memory, cost);
+ if (err)
+ goto free_htab;
htab->buckets = bpf_map_area_alloc(htab->buckets_num *
sizeof(struct bpf_htab_bucket),
htab->map.numa_node);
if (!htab->buckets) {
+ bpf_map_charge_finish(&htab->map.memory);
err = -ENOMEM;
goto free_htab;
}