diff options
| author |   Eelco Chaudron <echaudro@redhat.com> | 2020-05-27 10:42:00 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-06-01 14:38:21 -0700 |
| commit | 601b05ca6edb0422bf6ce313fbfd55ec7bbbc0fd (patch) | |
| tree | 9f30bade6912c01daf605dae76521b213c80f368 /tools/lib | |
| parent | bpf, selftests: Test probe_* helpers from SCHED_CLS (diff) | |
| download | wireguard-linux-601b05ca6edb0422bf6ce313fbfd55ec7bbbc0fd.tar.xz wireguard-linux-601b05ca6edb0422bf6ce313fbfd55ec7bbbc0fd.zip | |
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 <echaudro@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/159056888305.330763.9684536967379110349.stgit@ebuild
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 5 |
1 files changed, 4 insertions, 1 deletions
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); } |