From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 004E9C433E1 for ; Mon, 24 Aug 2020 17:09:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D67182074D for ; Mon, 24 Aug 2020 17:09:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598288940; bh=elLIwk+vXIz3X/dNZdhcxZlWgo/Xj0p8DfSj9gycQNg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IH0NBZFGtP88QiH1Rn8LYTdx9yE+ocktNRJS4bQGdlD1HB28ZMoB9jZJBrcBxRLrW VBU/T3ZV/7Vgzetds8D1iq7ugKjalfhltI5aE17+/u/o5XWMWLOa5L15OOcLCbMKcH HeJuwUyNdatQ7L9oKgF9xfAm7wJ7I8pGfY2LXkSY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727944AbgHXRIQ (ORCPT ); Mon, 24 Aug 2020 13:08:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:40038 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728434AbgHXQiY (ORCPT ); Mon, 24 Aug 2020 12:38:24 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A120923117; Mon, 24 Aug 2020 16:37:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598287066; bh=elLIwk+vXIz3X/dNZdhcxZlWgo/Xj0p8DfSj9gycQNg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tJ30+peaYdjyrRX+a3dcekyDNNSntYzGFf2G0ETt7gJ7KliyKYyAt69ZIsVFMgqNj c463geURfkvgWxX9aoL/3t8IxWoS8FlB9GyOrcT5ZwUiwn2zLRjwNt6K3HwvcA8jZm iRrABY2V6QJppEZqIVvRFhUfAyinsQOyVmYmNC7s= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yauheni Kaliuta , Alexei Starovoitov , Yonghong Song , Sasha Levin , linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH AUTOSEL 5.7 52/54] bpf: selftests: global_funcs: Check err_str before strstr Date: Mon, 24 Aug 2020 12:36:31 -0400 Message-Id: <20200824163634.606093-52-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200824163634.606093-1-sashal@kernel.org> References: <20200824163634.606093-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Yauheni Kaliuta [ Upstream commit c210773d6c6f595f5922d56b7391fe343bc7310e ] The error path in libbpf.c:load_program() has calls to pr_warn() which ends up for global_funcs tests to test_global_funcs.c:libbpf_debug_print(). For the tests with no struct test_def::err_str initialized with a string, it causes call of strstr() with NULL as the second argument and it segfaults. Fix it by calling strstr() only for non-NULL err_str. Signed-off-by: Yauheni Kaliuta Signed-off-by: Alexei Starovoitov Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20200820115843.39454-1-yauheni.kaliuta@redhat.com Signed-off-by: Sasha Levin --- tools/testing/selftests/bpf/prog_tests/test_global_funcs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c index 25b068591e9a4..193002b14d7f6 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c +++ b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c @@ -19,7 +19,7 @@ static int libbpf_debug_print(enum libbpf_print_level level, log_buf = va_arg(args, char *); if (!log_buf) goto out; - if (strstr(log_buf, err_str) == 0) + if (err_str && strstr(log_buf, err_str) == 0) found = true; out: printf(format, log_buf); -- 2.25.1