From patchwork Mon Oct 10 07:04:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xu Kuohai X-Patchwork-Id: 13002288 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A9F2C433F5 for ; Mon, 10 Oct 2022 06:47:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231522AbiJJGrN (ORCPT ); Mon, 10 Oct 2022 02:47:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231329AbiJJGrH (ORCPT ); Mon, 10 Oct 2022 02:47:07 -0400 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB9435247B; Sun, 9 Oct 2022 23:47:06 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4Mm8Xz2cq9z6R7vH; Mon, 10 Oct 2022 14:44:51 +0800 (CST) Received: from k01.huawei.com (unknown [10.67.174.197]) by APP2 (Coremail) with SMTP id Syh0CgDnf9Tiv0NjoL4qAA--.49036S6; Mon, 10 Oct 2022 14:47:05 +0800 (CST) From: Xu Kuohai To: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, netdev@vger.kernel.org Cc: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Mykola Lysenko , Shuah Khan , "David S . Miller" , Jakub Kicinski , Jesper Dangaard Brouer , Hou Tao , Dmitrii Dolgov <9erthalion6@gmail.com>, Alan Maguire , Kumar Kartikeya Dwivedi , Lorenzo Bianconi Subject: [PATCH bpf v2 4/5] selftest/bpf: Fix memory leak in kprobe_multi_test Date: Mon, 10 Oct 2022 03:04:53 -0400 Message-Id: <20221010070454.577433-5-xukuohai@huaweicloud.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221010070454.577433-1-xukuohai@huaweicloud.com> References: <20221010070454.577433-1-xukuohai@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: Syh0CgDnf9Tiv0NjoL4qAA--.49036S6 X-Coremail-Antispam: 1UD129KBjvJXoW7uFyfZw1fZF47Wr4xGrW3Jrb_yoW8Ar4Upa yFyw4Yka4xAF13X3W3GF48WFyruFsrZ34UuFWYvw15Cwn8Xw1kGF4xKay3KF95GrZ5Zw43 u3W5trn5Ga1UXaDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBSb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1l42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAI cVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2js IEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjxUFgAwUUUUU X-CM-SenderInfo: 50xn30hkdlqx5xdzvxpfor3voofrz/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Xu Kuohai The get_syms() function in kprobe_multi_test.c does not free the string memory allocated by sscanf correctly. Fix it. Fixes: 5b6c7e5c4434 ("selftests/bpf: Add attach bench test") Signed-off-by: Xu Kuohai --- .../bpf/prog_tests/kprobe_multi_test.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c index d457a55ff408..07dd2c5b7f98 100644 --- a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c @@ -360,15 +360,14 @@ static int get_syms(char ***symsp, size_t *cntp) * to them. Filter out the current culprits - arch_cpu_idle * and rcu_* functions. */ - if (!strcmp(name, "arch_cpu_idle")) - continue; - if (!strncmp(name, "rcu_", 4)) - continue; - if (!strcmp(name, "bpf_dispatcher_xdp_func")) - continue; - if (!strncmp(name, "__ftrace_invalid_address__", - sizeof("__ftrace_invalid_address__") - 1)) + if (!strcmp(name, "arch_cpu_idle") || + !strncmp(name, "rcu_", 4) || + !strcmp(name, "bpf_dispatcher_xdp_func") || + !strncmp(name, "__ftrace_invalid_address__", + sizeof("__ftrace_invalid_address__") - 1)) { + free(name); continue; + } err = hashmap__add(map, name, NULL); if (err) { free(name); @@ -394,7 +393,7 @@ static int get_syms(char ***symsp, size_t *cntp) hashmap__free(map); if (err) { for (i = 0; i < cnt; i++) - free(syms[cnt]); + free(syms[i]); free(syms); } return err;