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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 5770EC10F0B for ; Wed, 13 Mar 2019 19:20:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E9D0213A2 for ; Wed, 13 Mar 2019 19:20:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552504814; bh=gdqwjToUgY2pEGOjkqfQD180EYn3hcREsyH/mbv0g5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=aMJz8ulJ+uxakbWqHxMmK9y+SYNHYdUmJgOOQnUcS68vSc1zUVONc7hPzQW8nvss1 XZFbcSxtJnCzRmffEuzJa/5KA+zZb9Ane2mxQ3C6x9NhWzY/NTJ/RlHCbsHJd/GbS1 VqUUCGJldPSQPxeR4TkU4UVeHKVaoUjHslcyOGiA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728741AbfCMTSr (ORCPT ); Wed, 13 Mar 2019 15:18:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:49248 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729087AbfCMTSi (ORCPT ); Wed, 13 Mar 2019 15:18:38 -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 6435F2075C; Wed, 13 Mar 2019 19:18:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552504717; bh=gdqwjToUgY2pEGOjkqfQD180EYn3hcREsyH/mbv0g5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nFkqw8oTK6sS99UaS4/Did3kpOYc2+EcpufEFUjhAWud/WtuNCdGm/oEtPgN4/O0a arPaiKbRMALDd1ZSRU7Kog0JEeSLasEzm/TVD0kJpLuPzkeEAHE9Y2Zqr5pbxS1ewy pUEQfS66Bk4NXq1eOW5sqRU0lhG66z4x93VA9i+o= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Arnd Bergmann , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 12/15] phonet: fix building with clang Date: Wed, 13 Mar 2019 15:17:58 -0400 Message-Id: <20190313191806.160547-12-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190313191806.160547-1-sashal@kernel.org> References: <20190313191806.160547-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnd Bergmann [ Upstream commit 6321aa197547da397753757bd84c6ce64b3e3d89 ] clang warns about overflowing the data[] member in the struct pnpipehdr: net/phonet/pep.c:295:8: warning: array index 4 is past the end of the array (which contains 1 element) [-Warray-bounds] if (hdr->data[4] == PEP_IND_READY) ^ ~ include/net/phonet/pep.h:66:3: note: array 'data' declared here u8 data[1]; Using a flexible array member at the end of the struct avoids the warning, but since we cannot have a flexible array member inside of the union, each index now has to be moved back by one, which makes it a little uglier. Signed-off-by: Arnd Bergmann Acked-by: Rémi Denis-Courmont Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- include/net/phonet/pep.h | 5 +++-- net/phonet/pep.c | 32 ++++++++++++++++---------------- 2 files changed, 19 insertions(+), 18 deletions(-) diff --git a/include/net/phonet/pep.h b/include/net/phonet/pep.h index b669fe6dbc3b..98f31c7ea23d 100644 --- a/include/net/phonet/pep.h +++ b/include/net/phonet/pep.h @@ -63,10 +63,11 @@ struct pnpipehdr { u8 state_after_reset; /* reset request */ u8 error_code; /* any response */ u8 pep_type; /* status indication */ - u8 data[1]; + u8 data0; /* anything else */ }; + u8 data[]; }; -#define other_pep_type data[1] +#define other_pep_type data[0] static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb) { diff --git a/net/phonet/pep.c b/net/phonet/pep.c index 850a86cde0b3..f6aa532bcbf6 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -131,7 +131,7 @@ static int pep_indicate(struct sock *sk, u8 id, u8 code, ph->utid = 0; ph->message_id = id; ph->pipe_handle = pn->pipe_handle; - ph->data[0] = code; + ph->error_code = code; return pn_skb_send(sk, skb, NULL); } @@ -152,7 +152,7 @@ static int pipe_handler_request(struct sock *sk, u8 id, u8 code, ph->utid = id; /* whatever */ ph->message_id = id; ph->pipe_handle = pn->pipe_handle; - ph->data[0] = code; + ph->error_code = code; return pn_skb_send(sk, skb, NULL); } @@ -207,7 +207,7 @@ static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code, struct pnpipehdr *ph; struct sockaddr_pn dst; u8 data[4] = { - oph->data[0], /* PEP type */ + oph->pep_type, /* PEP type */ code, /* error code, at an unusual offset */ PAD, PAD, }; @@ -220,7 +220,7 @@ static int pep_ctrlreq_error(struct sock *sk, struct sk_buff *oskb, u8 code, ph->utid = oph->utid; ph->message_id = PNS_PEP_CTRL_RESP; ph->pipe_handle = oph->pipe_handle; - ph->data[0] = oph->data[1]; /* CTRL id */ + ph->data0 = oph->data[0]; /* CTRL id */ pn_skb_get_src_sockaddr(oskb, &dst); return pn_skb_send(sk, skb, &dst); @@ -271,17 +271,17 @@ static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb) return -EINVAL; hdr = pnp_hdr(skb); - if (hdr->data[0] != PN_PEP_TYPE_COMMON) { + if (hdr->pep_type != PN_PEP_TYPE_COMMON) { net_dbg_ratelimited("Phonet unknown PEP type: %u\n", - (unsigned int)hdr->data[0]); + (unsigned int)hdr->pep_type); return -EOPNOTSUPP; } - switch (hdr->data[1]) { + switch (hdr->data[0]) { case PN_PEP_IND_FLOW_CONTROL: switch (pn->tx_fc) { case PN_LEGACY_FLOW_CONTROL: - switch (hdr->data[4]) { + switch (hdr->data[3]) { case PEP_IND_BUSY: atomic_set(&pn->tx_credits, 0); break; @@ -291,7 +291,7 @@ static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb) } break; case PN_ONE_CREDIT_FLOW_CONTROL: - if (hdr->data[4] == PEP_IND_READY) + if (hdr->data[3] == PEP_IND_READY) atomic_set(&pn->tx_credits, wake = 1); break; } @@ -300,12 +300,12 @@ static int pipe_rcv_status(struct sock *sk, struct sk_buff *skb) case PN_PEP_IND_ID_MCFC_GRANT_CREDITS: if (pn->tx_fc != PN_MULTI_CREDIT_FLOW_CONTROL) break; - atomic_add(wake = hdr->data[4], &pn->tx_credits); + atomic_add(wake = hdr->data[3], &pn->tx_credits); break; default: net_dbg_ratelimited("Phonet unknown PEP indication: %u\n", - (unsigned int)hdr->data[1]); + (unsigned int)hdr->data[0]); return -EOPNOTSUPP; } if (wake) @@ -317,7 +317,7 @@ static int pipe_rcv_created(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *hdr = pnp_hdr(skb); - u8 n_sb = hdr->data[0]; + u8 n_sb = hdr->data0; pn->rx_fc = pn->tx_fc = PN_LEGACY_FLOW_CONTROL; __skb_pull(skb, sizeof(*hdr)); @@ -505,7 +505,7 @@ static int pep_connresp_rcv(struct sock *sk, struct sk_buff *skb) return -ECONNREFUSED; /* Parse sub-blocks */ - n_sb = hdr->data[4]; + n_sb = hdr->data[3]; while (n_sb > 0) { u8 type, buf[6], len = sizeof(buf); const u8 *data = pep_get_sb(skb, &type, &len, buf); @@ -738,7 +738,7 @@ static int pipe_do_remove(struct sock *sk) ph->utid = 0; ph->message_id = PNS_PIPE_REMOVE_REQ; ph->pipe_handle = pn->pipe_handle; - ph->data[0] = PAD; + ph->data0 = PAD; return pn_skb_send(sk, skb, NULL); } @@ -815,7 +815,7 @@ static struct sock *pep_sock_accept(struct sock *sk, int flags, int *errp) peer_type = hdr->other_pep_type << 8; /* Parse sub-blocks (options) */ - n_sb = hdr->data[4]; + n_sb = hdr->data[3]; while (n_sb > 0) { u8 type, buf[1], len = sizeof(buf); const u8 *data = pep_get_sb(skb, &type, &len, buf); @@ -1106,7 +1106,7 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb) ph->utid = 0; if (pn->aligned) { ph->message_id = PNS_PIPE_ALIGNED_DATA; - ph->data[0] = 0; /* padding */ + ph->data0 = 0; /* padding */ } else ph->message_id = PNS_PIPE_DATA; ph->pipe_handle = pn->pipe_handle; -- 2.19.1