diff options
| author | Hao Luo <haoluo@google.com> | 2023-08-22 22:38:40 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2023-08-23 02:16:31 +0300 |
| commit | 29d67fdebc42af6466d1909c60fdd1ef4f3e5240 (patch) | |
| tree | 80d1f564e0b6db1fb1e71104bea4a30b6924a9f5 /tools/lib | |
| parent | 87680ac7979177a34ca39b5a35a2ed94209cd20f (diff) | |
| download | linux-29d67fdebc42af6466d1909c60fdd1ef4f3e5240.tar.xz | |
libbpf: Free btf_vmlinux when closing bpf_object
I hit a memory leak when testing bpf_program__set_attach_target().
Basically, set_attach_target() may allocate btf_vmlinux, for example,
when setting attach target for bpf_iter programs. But btf_vmlinux
is freed only in bpf_object_load(), which means if we only open
bpf object but not load it, setting attach target may leak
btf_vmlinux.
So let's free btf_vmlinux in bpf_object__close() anyway.
Signed-off-by: Hao Luo <haoluo@google.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20230822193840.1509809-1-haoluo@google.com
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index b8afe2f5bc93..4c3967d94b6d 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -8423,6 +8423,7 @@ void bpf_object__close(struct bpf_object *obj) bpf_object__elf_finish(obj); bpf_object_unload(obj); btf__free(obj->btf); + btf__free(obj->btf_vmlinux); btf_ext__free(obj->btf_ext); for (i = 0; i < obj->nr_maps; i++) |