From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id B95E54C93; Mon, 10 Sep 2018 11:33:52 +0200 (CEST) X-Virus-Scanned: Proofpoint Essentials engine Received: from webmail.solarflare.com (webmail.solarflare.com [12.187.104.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mx1-us1.ppe-hosted.com (Proofpoint Essentials ESMTP Server) with ESMTPS id DBC26780055; Mon, 10 Sep 2018 09:33:51 +0000 (UTC) Received: from ocex03.SolarFlarecom.com (10.20.40.36) by ocex03.SolarFlarecom.com (10.20.40.36) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 10 Sep 2018 02:33:48 -0700 Received: from opal.uk.solarflarecom.com (10.17.10.1) by ocex03.SolarFlarecom.com (10.20.40.36) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Mon, 10 Sep 2018 02:33:47 -0700 Received: from ukv-loginhost.uk.solarflarecom.com (ukv-loginhost.uk.solarflarecom.com [10.17.10.39]) by opal.uk.solarflarecom.com (8.13.8/8.13.8) with ESMTP id w8A9Xkeb023830; Mon, 10 Sep 2018 10:33:46 +0100 Received: from ukv-loginhost.uk.solarflarecom.com (localhost [127.0.0.1]) by ukv-loginhost.uk.solarflarecom.com (Postfix) with ESMTP id 41B7F1626D2; Mon, 10 Sep 2018 10:33:46 +0100 (BST) From: Andrew Rybchenko To: CC: Martin Harvey , Date: Mon, 10 Sep 2018 10:33:20 +0100 Message-ID: <1536572016-18134-22-git-send-email-arybchenko@solarflare.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1536572016-18134-1-git-send-email-arybchenko@solarflare.com> References: <1536572016-18134-1-git-send-email-arybchenko@solarflare.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.5.1010-24084.005 X-TM-AS-Result: No-3.054800-4.000000-10 X-TMASE-MatchedRID: KZL/HywDPYQ6d8weoeLiafVFR4sC8dPySjyMfjCRfaPfUZT83lbkEGwb eb04PSV44lGx6/foxGCATkBnmBBZvjFmWZmMuV5m3fn7n/ZHGqaWHGENdT+VP57oC1rVz/uNo8W MkQWv6iXBcIE78YqRWo6HM5rqDwqtRQB46AXOCdLmx94sR56dC9xVLz85I7B0TwZqs0n+TmE2nl 75kX61DqltkZaU7aNK4a23t5/PkTGWkXvdfncHqkMpbgDSvEVRhdeYev6ImzWyrFieOBrhBjzcW rt/fwYrRcB2ZpPnVjJuI9MGG9suFpRMZUCEHkRt X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--3.054800-4.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.5.1010-24084.005 X-MDID: 1536572032-dD6CC8ldkj3M Subject: [dpdk-dev] [PATCH 21/37] net/sfc/base: avoid usage of too big arrays on stack X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Sep 2018 09:33:53 -0000 From: Martin Harvey Found by PreFAST static analysis. Fixes: 1dae25112a54 ("net/sfc/base: import built-in selftest") Fixes: d96a34d165b1 ("net/sfc/base: import NVRAM support") Cc: stable@dpdk.org Signed-off-by: Martin Harvey Signed-off-by: Andrew Rybchenko --- drivers/net/sfc/base/ef10_phy.c | 18 +++++++++++++++--- drivers/net/sfc/base/efx_nvram.c | 27 ++++++++++++++++++--------- 2 files changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/net/sfc/base/ef10_phy.c b/drivers/net/sfc/base/ef10_phy.c index 84acb70a1..e9c7b40e4 100644 --- a/drivers/net/sfc/base/ef10_phy.c +++ b/drivers/net/sfc/base/ef10_phy.c @@ -583,14 +583,26 @@ ef10_bist_poll( unsigned long *valuesp, __in size_t count) { + /* + * MCDI_CTL_SDU_LEN_MAX_V1 is large enough cover all BIST results, + * whilst not wasting stack. + */ + uint8_t payload[MAX(MC_CMD_POLL_BIST_IN_LEN, MCDI_CTL_SDU_LEN_MAX_V1)]; efx_nic_cfg_t *encp = &(enp->en_nic_cfg); efx_mcdi_req_t req; - uint8_t payload[MAX(MC_CMD_POLL_BIST_IN_LEN, - MCDI_CTL_SDU_LEN_MAX)]; uint32_t value_mask = 0; uint32_t result; efx_rc_t rc; + EFX_STATIC_ASSERT(MC_CMD_POLL_BIST_OUT_LEN <= + MCDI_CTL_SDU_LEN_MAX_V1); + EFX_STATIC_ASSERT(MC_CMD_POLL_BIST_OUT_SFT9001_LEN <= + MCDI_CTL_SDU_LEN_MAX_V1); + EFX_STATIC_ASSERT(MC_CMD_POLL_BIST_OUT_MRSFP_LEN <= + MCDI_CTL_SDU_LEN_MAX_V1); + EFX_STATIC_ASSERT(MC_CMD_POLL_BIST_OUT_MEM_LEN <= + MCDI_CTL_SDU_LEN_MAX_V1); + _NOTE(ARGUNUSED(type)) (void) memset(payload, 0, sizeof (payload)); @@ -598,7 +610,7 @@ ef10_bist_poll( req.emr_in_buf = payload; req.emr_in_length = MC_CMD_POLL_BIST_IN_LEN; req.emr_out_buf = payload; - req.emr_out_length = MCDI_CTL_SDU_LEN_MAX; + req.emr_out_length = MCDI_CTL_SDU_LEN_MAX_V1; efx_mcdi_execute(enp, &req); diff --git a/drivers/net/sfc/base/efx_nvram.c b/drivers/net/sfc/base/efx_nvram.c index 9000fe886..d7b1a6778 100644 --- a/drivers/net/sfc/base/efx_nvram.c +++ b/drivers/net/sfc/base/efx_nvram.c @@ -869,23 +869,27 @@ efx_mcdi_nvram_write( __in size_t size) { efx_mcdi_req_t req; - uint8_t payload[MAX(MCDI_CTL_SDU_LEN_MAX_V1, - MCDI_CTL_SDU_LEN_MAX_V2)]; + uint8_t *payload; efx_rc_t rc; size_t max_data_size; + size_t payload_len = enp->en_nic_cfg.enc_mcdi_max_payload_length; - max_data_size = enp->en_nic_cfg.enc_mcdi_max_payload_length - - MC_CMD_NVRAM_WRITE_IN_LEN(0); - EFSYS_ASSERT3U(enp->en_nic_cfg.enc_mcdi_max_payload_length, >, 0); - EFSYS_ASSERT3U(max_data_size, <, - enp->en_nic_cfg.enc_mcdi_max_payload_length); + max_data_size = payload_len - MC_CMD_NVRAM_WRITE_IN_LEN(0); + EFSYS_ASSERT3U(payload_len, >, 0); + EFSYS_ASSERT3U(max_data_size, <, payload_len); if (size > max_data_size) { rc = EINVAL; goto fail1; } - (void) memset(payload, 0, sizeof (payload)); + EFSYS_KMEM_ALLOC(enp->en_esip, payload_len, payload); + if (payload == NULL) { + rc = ENOMEM; + goto fail2; + } + + (void) memset(payload, 0, payload_len); req.emr_cmd = MC_CMD_NVRAM_WRITE; req.emr_in_buf = payload; req.emr_in_length = MC_CMD_NVRAM_WRITE_IN_LEN(size); @@ -903,11 +907,16 @@ efx_mcdi_nvram_write( if (req.emr_rc != 0) { rc = req.emr_rc; - goto fail2; + goto fail3; } + EFSYS_KMEM_FREE(enp->en_esip, payload_len, payload); + return (0); +fail3: + EFSYS_PROBE(fail3); + EFSYS_KMEM_FREE(enp->en_esip, payload_len, payload); fail2: EFSYS_PROBE(fail2); fail1: -- 2.17.1