From patchwork Wed Feb 16 19:48:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 543314 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 E992CC433F5 for ; Wed, 16 Feb 2022 19:41:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238159AbiBPTlP (ORCPT ); Wed, 16 Feb 2022 14:41:15 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:42764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237789AbiBPTlN (ORCPT ); Wed, 16 Feb 2022 14:41:13 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 637A82B04AB; Wed, 16 Feb 2022 11:41:00 -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 sin.source.kernel.org (Postfix) with ESMTPS id C8755CE288B; Wed, 16 Feb 2022 19:40:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5529CC340E8; Wed, 16 Feb 2022 19:40:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645040457; bh=wETB63wkrW29pVFYDN5iqpi8/oDhPHZmrk8FQPS0BWs=; h=Date:From:To:Cc:Subject:From; b=ote3JCvMRwxXqsDm/YtHXL8w+ORYSsLHwssTRh5GDO5OWiRL4g51gYlhF78pQ41jR x7bq0RKH0ewLko5LxIkFuqTTwhcxohgkp8brgRhB4hWcC6GkezNR+mTdu9ArqCay8r NMPMwxQbWotYhGG8GWO9kJpc252HrW+BUqo6X75WYi4kwQFrilmU5N6M9Qr3gBAR9F hph5DKQfDKtuR3WFpBxeiv5Fi5N8XO6CNwOigFTSwC2GXxxfbJXt+rEnwopX0MV0kt lHkujyIrYA3C1566mrjxd1o7t0i1qgPqJL8zD/b77sgOdzJhPzP6bEf1PSBD2lmfCm UWRlckcB7+GLA== Date: Wed, 16 Feb 2022 13:48:36 -0600 From: "Gustavo A. R. Silva" To: Kalle Valo , "David S. Miller" , Jakub Kicinski Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" , linux-hardening@vger.kernel.org Subject: [PATCH][next] ath11k: Replace zero-length arrays with flexible-array members Message-ID: <20220216194836.GA904035@embeddedor> MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/78 Signed-off-by: Gustavo A. R. Silva Reviewed-by: Kees Cook --- drivers/net/wireless/ath/ath11k/ce.h | 2 +- drivers/net/wireless/ath/ath11k/core.h | 2 +- drivers/net/wireless/ath/ath11k/dp.h | 10 +++++----- drivers/net/wireless/ath/ath11k/rx_desc.h | 6 +++--- drivers/net/wireless/ath/ath11k/spectral.c | 2 +- 5 files changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/ce.h b/drivers/net/wireless/ath/ath11k/ce.h index 8255b6cfab0c..9644ff909502 100644 --- a/drivers/net/wireless/ath/ath11k/ce.h +++ b/drivers/net/wireless/ath/ath11k/ce.h @@ -145,7 +145,7 @@ struct ath11k_ce_ring { u32 hal_ring_id; /* keep last */ - struct sk_buff *skb[0]; + struct sk_buff *skb[]; }; struct ath11k_ce_pipe { diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h index 9e88ccca5ca7..e5cc007b6feb 100644 --- a/drivers/net/wireless/ath/ath11k/core.h +++ b/drivers/net/wireless/ath/ath11k/core.h @@ -806,7 +806,7 @@ struct ath11k_base { } id; /* must be last */ - u8 drv_priv[0] __aligned(sizeof(void *)); + u8 drv_priv[] __aligned(sizeof(void *)); }; struct ath11k_fw_stats_pdev { diff --git a/drivers/net/wireless/ath/ath11k/dp.h b/drivers/net/wireless/ath/ath11k/dp.h index 409d6cc5a1d5..b644e4675818 100644 --- a/drivers/net/wireless/ath/ath11k/dp.h +++ b/drivers/net/wireless/ath/ath11k/dp.h @@ -1170,12 +1170,12 @@ struct ath11k_htt_ppdu_stats_msg { u32 ppdu_id; u32 timestamp; u32 rsvd; - u8 data[0]; + u8 data[]; } __packed; struct htt_tlv { u32 header; - u8 value[0]; + u8 value[]; } __packed; #define HTT_TLV_TAG GENMASK(11, 0) @@ -1362,7 +1362,7 @@ struct htt_ppdu_stats_usr_cmn_array { * tx_ppdu_stats_info is variable length, with length = * number_of_ppdu_stats * sizeof (struct htt_tx_ppdu_stats_info) */ - struct htt_tx_ppdu_stats_info tx_ppdu_info[0]; + struct htt_tx_ppdu_stats_info tx_ppdu_info[]; } __packed; struct htt_ppdu_user_stats { @@ -1424,7 +1424,7 @@ struct htt_ppdu_stats_info { */ struct htt_pktlog_msg { u32 hdr; - u8 payload[0]; + u8 payload[]; }; /** @@ -1645,7 +1645,7 @@ struct ath11k_htt_extd_stats_msg { u32 info0; u64 cookie; u32 info1; - u8 data[0]; + u8 data[]; } __packed; #define HTT_MAC_ADDR_L32_0 GENMASK(7, 0) diff --git a/drivers/net/wireless/ath/ath11k/rx_desc.h b/drivers/net/wireless/ath/ath11k/rx_desc.h index 79c50804d7dc..26ecc1bcd9d5 100644 --- a/drivers/net/wireless/ath/ath11k/rx_desc.h +++ b/drivers/net/wireless/ath/ath11k/rx_desc.h @@ -1445,7 +1445,7 @@ struct hal_rx_desc_ipq8074 { __le32 hdr_status_tag; __le32 phy_ppdu_id; u8 hdr_status[HAL_RX_DESC_HDR_STATUS_LEN]; - u8 msdu_payload[0]; + u8 msdu_payload[]; } __packed; struct hal_rx_desc_qcn9074 { @@ -1464,7 +1464,7 @@ struct hal_rx_desc_qcn9074 { __le32 hdr_status_tag; __le32 phy_ppdu_id; u8 hdr_status[HAL_RX_DESC_HDR_STATUS_LEN]; - u8 msdu_payload[0]; + u8 msdu_payload[]; } __packed; struct hal_rx_desc_wcn6855 { @@ -1483,7 +1483,7 @@ struct hal_rx_desc_wcn6855 { __le32 hdr_status_tag; __le32 phy_ppdu_id; u8 hdr_status[HAL_RX_DESC_HDR_STATUS_LEN]; - u8 msdu_payload[0]; + u8 msdu_payload[]; } __packed; struct hal_rx_desc { diff --git a/drivers/net/wireless/ath/ath11k/spectral.c b/drivers/net/wireless/ath/ath11k/spectral.c index 4100cc1449a2..2b18871d5f7c 100644 --- a/drivers/net/wireless/ath/ath11k/spectral.c +++ b/drivers/net/wireless/ath/ath11k/spectral.c @@ -107,7 +107,7 @@ struct spectral_search_fft_report { __le32 info1; __le32 info2; __le32 reserve0; - u8 bins[0]; + u8 bins[]; } __packed; struct ath11k_spectral_search_report {