From patchwork Sat May 9 12:06:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 1286659 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=arndb.de Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49K5Ym2GRcz9sSw for ; Sat, 9 May 2020 22:07:56 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728552AbgEIMHu (ORCPT ); Sat, 9 May 2020 08:07:50 -0400 Received: from mout.kundenserver.de ([217.72.192.74]:45837 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727093AbgEIMHq (ORCPT ); Sat, 9 May 2020 08:07:46 -0400 Received: from localhost.localdomain ([149.172.19.189]) by mrelayeu.kundenserver.de (mreue107 [212.227.15.145]) with ESMTPA (Nemesis) id 1MHWvH-1jKU520UVt-00DX52; Sat, 09 May 2020 14:07:13 +0200 From: Arnd Bergmann To: Kalle Valo Cc: Arnd Bergmann , "Gustavo A. R. Silva" , Michal Kazior , Kalle Valo , "David S. Miller" , Wen Gong , Erik Stromdahl , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 1/2] ath10k: fix gcc-10 zero-length-bounds warnings Date: Sat, 9 May 2020 14:06:32 +0200 Message-Id: <20200509120707.188595-1-arnd@arndb.de> X-Mailer: git-send-email 2.26.0 MIME-Version: 1.0 X-Provags-ID: V03:K1:md3rGtm9B4AL9nvSbhTd+KISJpmcfvjMjuz727nzZm2ZvFT08RI 4X3GNiglYQmcZcXlGiFzAfI8qklVyu72RVyCSXUtfldCvePSj61BDEZlHHReaflvqiznmoE 5HonKZMPDVDwN29blRt/Ip7sw3mul8n1tgqN9WkhOKVzXFNcOZT5DWfk95qwreYQPZT6ryz eD7aa3o1noCIrZFf+tmXg== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:xnYyufblF38=:aqdJovHTUmVD7l7sJtYi6R O2VyTtN8cEC5i1EHJ/QrGJTzuZeDvWHv+4wBXmOdq+vCri1/O+O8ZHnHEU62SyfrF2VyfbL40 3urDiERgiSr77LhdpxdMwRpoS8l2vfp6FvbIf2nz4ag/rn55duaDINqQSGCsJlTA/CNQQP0jA l6hqytr7uwp+aJzEUwGvkOHrv83UTBoC/MSyc2w1eqkEFKPb0CpMoAFJgw60vU4nYI5YDse8p TENge1jYBX1cKNmDact8vq15wBMtannapu9oLNfH4+OmRHVMRyiN/hUDOEQJCQgqT0aeotHkO Csd33s0vb2GCnFTQRRfhulmPZikLXUglgEOJkvKdwVMgOXkbWnbjFTRbh98jb8XCzrHqAEo5c RtjW1gozK+Ex0mMRGBCPUX5OcpV/WjDP4LdlMpbDPHYPfw2zA0slct/rVbfh3q6Y2U45h7OFp T8+JCeAntbaV/B3DRDFUeW7EoheAdm4WGc+FOn1xP9r8QxDXlelhmOTDqJ6BqjIXxYl7NgZ/w 2KPZp/Ra90JLJeLJrbK4XkYJNA3JE/YPLKLOVSlaTPT8tnn5FSOVKoQ92RVzs1qTjfk5kGREu J05vfQLaHM3KrUEV79aUqy6k1iOi8ZPVrYEnyGH5EKHeNEkF0SfODkaDa6HhzDqKgQO/MN8d1 9S0A+9/C/kF+KJhNTCmScZYK6WS4xkZa9tKHHZ3MCSOXS9+FGw7oIgvrs4U+IufVz3qsAGECG JQiilaFIEJbIHBCoYPfe2Bq2WjwoZr+Uw83CMMw0aUvIJdeHeqv9MMZC07pzZyXotRlPTRJbz FEJswylkJbsUwPMFx0fF8aI6b2RjADap9Uy5S4eazZvyxlM9dE= Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org gcc-10 started warning about out-of-bounds access for zero-length arrays: In file included from drivers/net/wireless/ath/ath10k/core.h:18, from drivers/net/wireless/ath/ath10k/htt_rx.c:8: drivers/net/wireless/ath/ath10k/htt_rx.c: In function 'ath10k_htt_rx_tx_fetch_ind': drivers/net/wireless/ath/ath10k/htt.h:1683:17: warning: array subscript 65535 is outside the bounds of an interior zero-length array 'struct htt_tx_fetch_record[0]' [-Wzero-length-bounds] 1683 | return (void *)&ind->records[le16_to_cpu(ind->num_records)]; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/ath/ath10k/htt.h:1676:29: note: while referencing 'records' 1676 | struct htt_tx_fetch_record records[0]; | ^~~~~~~ Make records[] a flexible array member to allow this, moving it behind the other zero-length member that is not accessed in a way that gcc warns about. Fixes: 3ba225b506a2 ("treewide: Replace zero-length array with flexible-array member") Fixes: 22e6b3bc5d96 ("ath10k: add new htt definitions") Signed-off-by: Arnd Bergmann --- drivers/net/wireless/ath/ath10k/htt.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h index 8f3710cf28f4..aa056a186402 100644 --- a/drivers/net/wireless/ath/ath10k/htt.h +++ b/drivers/net/wireless/ath/ath10k/htt.h @@ -1673,8 +1673,8 @@ struct htt_tx_fetch_ind { __le32 token; __le16 num_resp_ids; __le16 num_records; - struct htt_tx_fetch_record records[0]; __le32 resp_ids[0]; /* ath10k_htt_get_tx_fetch_ind_resp_ids() */ + struct htt_tx_fetch_record records[]; } __packed; static inline void *