From patchwork Mon Jan 30 13:49:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 13121172 X-Patchwork-Delegate: kuba@kernel.org 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 1AD5CC54EED for ; Mon, 30 Jan 2023 14:02:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236932AbjA3OCX (ORCPT ); Mon, 30 Jan 2023 09:02:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236909AbjA3OCI (ORCPT ); Mon, 30 Jan 2023 09:02:08 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1664839CF0; Mon, 30 Jan 2023 06:02:02 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A2B3F61031; Mon, 30 Jan 2023 14:02:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DF4DC433D2; Mon, 30 Jan 2023 14:02:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675087321; bh=aUHe/ku59CJyZQYm3tJm3BPQl1OqQXpECyjv8TUP338=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LIbnsMlyR/6YDlxxmjI5FfUDPNV+gmD/SfSs+li+gj+2lSfQk78RwFlyOCRNwu2Jo DqtSaJM4KfHdrNwBFClJnBcQBwWOZWqqra4ClYPDCjvUJBMJDdF145CkEkCfsbcz3m ClTvwDbxQHbHcmEsEu6mgJXDiuCvh0s9FBYKSxtQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Niklas Cassel , Michael Chan , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, Kees Cook , Niklas Cassel , Sasha Levin Subject: [PATCH 6.1 139/313] bnxt: Do not read past the end of test names Date: Mon, 30 Jan 2023 14:49:34 +0100 Message-Id: <20230130134343.125552398@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230130134336.532886729@linuxfoundation.org> References: <20230130134336.532886729@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Kees Cook [ Upstream commit d3e599c090fc6977331150c5f0a69ab8ce87da21 ] Test names were being concatenated based on a offset beyond the end of the first name, which tripped the buffer overflow detection logic: detected buffer overflow in strnlen [...] Call Trace: bnxt_ethtool_init.cold+0x18/0x18 Refactor struct hwrm_selftest_qlist_output to use an actual array, and adjust the concatenation to use snprintf() rather than a series of strncat() calls. Reported-by: Niklas Cassel Link: https://lore.kernel.org/lkml/Y8F%2F1w1AZTvLglFX@x1-carbon/ Tested-by: Niklas Cassel Fixes: eb51365846bc ("bnxt_en: Add basic ethtool -t selftest support.") Cc: Michael Chan Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Michael Chan Reviewed-by: Niklas Cassel Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 13 ++++--------- drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h | 9 +-------- 2 files changed, 5 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c index 8cad15c458b3..703fc163235f 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c @@ -3865,7 +3865,7 @@ void bnxt_ethtool_init(struct bnxt *bp) test_info->timeout = HWRM_CMD_TIMEOUT; for (i = 0; i < bp->num_tests; i++) { char *str = test_info->string[i]; - char *fw_str = resp->test0_name + i * 32; + char *fw_str = resp->test_name[i]; if (i == BNXT_MACLPBK_TEST_IDX) { strcpy(str, "Mac loopback test (offline)"); @@ -3876,14 +3876,9 @@ void bnxt_ethtool_init(struct bnxt *bp) } else if (i == BNXT_IRQ_TEST_IDX) { strcpy(str, "Interrupt_test (offline)"); } else { - strscpy(str, fw_str, ETH_GSTRING_LEN); - strncat(str, " test", ETH_GSTRING_LEN - strlen(str)); - if (test_info->offline_mask & (1 << i)) - strncat(str, " (offline)", - ETH_GSTRING_LEN - strlen(str)); - else - strncat(str, " (online)", - ETH_GSTRING_LEN - strlen(str)); + snprintf(str, ETH_GSTRING_LEN, "%s test (%s)", + fw_str, test_info->offline_mask & (1 << i) ? + "offline" : "online"); } } diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h index b753032a1047..fb78fc38530d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h @@ -10099,14 +10099,7 @@ struct hwrm_selftest_qlist_output { u8 unused_0; __le16 test_timeout; u8 unused_1[2]; - char test0_name[32]; - char test1_name[32]; - char test2_name[32]; - char test3_name[32]; - char test4_name[32]; - char test5_name[32]; - char test6_name[32]; - char test7_name[32]; + char test_name[8][32]; u8 eyescope_target_BER_support; #define SELFTEST_QLIST_RESP_EYESCOPE_TARGET_BER_SUPPORT_BER_1E8_SUPPORTED 0x0UL #define SELFTEST_QLIST_RESP_EYESCOPE_TARGET_BER_SUPPORT_BER_1E9_SUPPORTED 0x1UL