From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57C9330F80 for ; Wed, 20 Sep 2023 12:42:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2252C433C8; Wed, 20 Sep 2023 12:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695213752; bh=fX2/U5S7KmqGlxTJopMU2joa/FUlgEVSM8Uxdy0kT48=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R1+ql8gQGhK7ixXP31a0wtDmsUHyA1h6LGUOfXPsKvWVFUlfhmZ3J40JKfsSrUJD5 zE2PwgpQoLAHX4PM2JuIz+j7MEvlJbG5UwyaHL7Xjzks5lTkXiFgU6cLNxRhDTrogO G2zEAnVwRX81uhUvopkcb+y9wMioRKMP125o4xXM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hao Luo , Andrii Nakryiko , Sasha Levin Subject: [PATCH 5.4 326/367] libbpf: Free btf_vmlinux when closing bpf_object Date: Wed, 20 Sep 2023 13:31:43 +0200 Message-ID: <20230920112906.975001366@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112858.471730572@linuxfoundation.org> References: <20230920112858.471730572@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hao Luo [ Upstream commit 29d67fdebc42af6466d1909c60fdd1ef4f3e5240 ] 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 Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20230822193840.1509809-1-haoluo@google.com Signed-off-by: Sasha Levin --- tools/lib/bpf/libbpf.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index b8849812449c3..343018632d2d1 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -4202,6 +4202,7 @@ 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++) { -- 2.40.1