6.9-stable review patch. If anyone has any objections, please let me know.
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From: Andrii Nakryiko andrii@kernel.org
[ Upstream commit 1de27bba6d50a909647f304eadc0f7c59a842a50 ]
Adjust `union bpf_attr` size passed to kernel in two feature-detecting functions to take into account prog_token_fd field.
Libbpf is avoiding memset()'ing entire `union bpf_attr` by only using minimal set of bpf_attr's fields. Two places have been missed when wiring BPF token support in libbpf's feature detection logic.
Fix them trivially.
Fixes: f3dcee938f48 ("libbpf: Wire up token_fd into feature probing logic") Signed-off-by: Andrii Nakryiko andrii@kernel.org Link: https://lore.kernel.org/r/20240513180804.403775-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/lib/bpf/bpf.c | 2 +- tools/lib/bpf/features.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 97ec005c3c47f..145b8bd1d5ff1 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -105,7 +105,7 @@ int sys_bpf_prog_load(union bpf_attr *attr, unsigned int size, int attempts) */ int probe_memcg_account(int token_fd) { - const size_t attr_sz = offsetofend(union bpf_attr, attach_btf_obj_fd); + const size_t attr_sz = offsetofend(union bpf_attr, prog_token_fd); struct bpf_insn insns[] = { BPF_EMIT_CALL(BPF_FUNC_ktime_get_coarse_ns), BPF_EXIT_INSN(), diff --git a/tools/lib/bpf/features.c b/tools/lib/bpf/features.c index 4e783cc7fc4b5..a336786a22a38 100644 --- a/tools/lib/bpf/features.c +++ b/tools/lib/bpf/features.c @@ -22,7 +22,7 @@ int probe_fd(int fd)
static int probe_kern_prog_name(int token_fd) { - const size_t attr_sz = offsetofend(union bpf_attr, prog_name); + const size_t attr_sz = offsetofend(union bpf_attr, prog_token_fd); struct bpf_insn insns[] = { BPF_MOV64_IMM(BPF_REG_0, 0), BPF_EXIT_INSN(),