5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anton Protopopov <aspsk@xxxxxxxxxxxxx> [ Upstream commit 59b418c7063d30e0a3e1f592d47df096db83185c ] The struct bpf_fib_lookup should not grow outside of its 64 bytes. Add a static assert to validate this. Suggested-by: David Ahern <dsahern@xxxxxxxxxx> Signed-off-by: Anton Protopopov <aspsk@xxxxxxxxxxxxx> Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx> Link: https://lore.kernel.org/bpf/20240326101742.17421-4-aspsk@xxxxxxxxxxxxx Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- net/core/filter.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 49e4d1535cc82..a3101cdfd47b9 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -78,6 +78,9 @@ #include <linux/btf_ids.h> #include <net/tls.h> +/* Keep the struct bpf_fib_lookup small so that it fits into a cacheline */ +static_assert(sizeof(struct bpf_fib_lookup) == 64, "struct bpf_fib_lookup size check"); + static const struct bpf_func_proto * bpf_sk_base_func_proto(enum bpf_func_id func_id); -- 2.43.0
