From 601b05ca6edb0422bf6ce313fbfd55ec7bbbc0fd Mon Sep 17 00:00:00 2001 From: Eelco Chaudron Date: Wed, 27 May 2020 10:42:00 +0200 Subject: libbpf: Fix perf_buffer__free() API for sparse allocs In case the cpu_bufs are sparsely allocated they are not all free'ed. These changes will fix this. Fixes: fb84b8224655 ("libbpf: add perf buffer API") Signed-off-by: Eelco Chaudron Signed-off-by: Daniel Borkmann Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/159056888305.330763.9684536967379110349.stgit@ebuild Signed-off-by: Alexei Starovoitov --- tools/lib/bpf/libbpf.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'tools/lib/bpf') diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5d60de6fd818..74d967619dcf 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -8137,9 +8137,12 @@ void perf_buffer__free(struct perf_buffer *pb) if (!pb) return; if (pb->cpu_bufs) { - for (i = 0; i < pb->cpu_cnt && pb->cpu_bufs[i]; i++) { + for (i = 0; i < pb->cpu_cnt; i++) { struct perf_cpu_buf *cpu_buf = pb->cpu_bufs[i]; + if (!cpu_buf) + continue; + bpf_map_delete_elem(pb->map_fd, &cpu_buf->map_key); perf_buffer__free_cpu_buf(pb, cpu_buf); } -- cgit v1.2.3