From patchwork Tue Jul 16 11:06:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Paolo Abeni X-Patchwork-Id: 13734308 X-Patchwork-Delegate: kuba@kernel.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EC73D1CFBE for ; Tue, 16 Jul 2024 11:07:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721128049; cv=none; b=ty/F57Uk5K5HGaYdVa/v0HhweEW8WjD0teGZf9zA2bDaSRuQUEuuJBe8+Er0DN58BFgyiiUc9F5cKWxUhGxNAovlJB0ze5d3gLQv3//TwG8TVJEcM5HND2RGjtFrXUcl10sTyRuBxJNtg0cVbwvgF0fTC8sOqFIHYvBYxgrvSrU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721128049; c=relaxed/simple; bh=ksg9S2Lx7KorDm/hrBtFt0KGof42WCBKh1f7g5GEq6Y=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=AtTwaLT5AnKlx4ayFFOPteXHe27O6GXxEmF21MVeEZz4qpbF5XwSqYSS3GqcSxydNsXFg1uF/NKGBoBOlmOST9vLcW9f2qkPoL5auImA6D886OhwgPwOpKGMxUpmG57SLct16pyNxGWeGYAN7ubJYJ+gXBEq5TGhVANVDN4Nhqc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=gA8nyVSJ; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="gA8nyVSJ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1721128046; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Hvvnj1XLuLsMaLUuoqgaQm4hXgNbSPKG0xi9JLjL1II=; b=gA8nyVSJDAbYr1Hzda7iFqcl5H0f8veQHJQNnnw4wZ7/xmjSk/rBQDlpMfBkPdxrJ8F9DF cjrpkTo7pETlhLuc7xwnpq8QDk8ZTmuWA1QJbk9kZyvb11j7ehPN51BAaTXk41avItvj80 Vqo3JME3STwnuGCxwfbCLPm4KHHs3Uk= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-321-njBfylUNN9GjlMHzilKnrg-1; Tue, 16 Jul 2024 07:07:23 -0400 X-MC-Unique: njBfylUNN9GjlMHzilKnrg-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 657B01955BF2; Tue, 16 Jul 2024 11:07:20 +0000 (UTC) Received: from gerbillo.redhat.com (unknown [10.45.225.70]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id ACA591955D47; Tue, 16 Jul 2024 11:07:16 +0000 (UTC) From: Paolo Abeni To: netdev@vger.kernel.org Cc: Kalle Valo , Jeff Johnson , Baochen Qiang , linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, Jakub Kicinski , "David S. Miller" , Eric Dumazet Subject: [PATCH net] wifi: ath12k: fix build vs old compiler Date: Tue, 16 Jul 2024 13:06:39 +0200 Message-ID: <3175f87d7227e395b330fd88fb840c1645084ea7.1721127979.git.pabeni@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 X-Patchwork-Delegate: kuba@kernel.org gcc 11.4.1-3 warns about memcpy() with overlapping pointers: drivers/net/wireless/ath/ath12k/wow.c: In function ‘ath12k_wow_convert_8023_to_80211.constprop’: ./include/linux/fortify-string.h:114:33: error: ‘__builtin_memcpy’ accessing 18446744073709551611 or more bytes at offsets 0 and 0 overlaps 9223372036854775799 bytes at offset -9223372036854775804 [-Werror=restrict] 114 | #define __underlying_memcpy __builtin_memcpy | ^ ./include/linux/fortify-string.h:637:9: note: in expansion of macro ‘__underlying_memcpy’ 637 | __underlying_##op(p, q, __fortify_size); \ | ^~~~~~~~~~~~~ ./include/linux/fortify-string.h:682:26: note: in expansion of macro ‘__fortify_memcpy_chk’ 682 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \ | ^~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/ath/ath12k/wow.c:190:25: note: in expansion of macro ‘memcpy’ 190 | memcpy(pat, eth_pat, eth_pat_len); | ^~~~~~ ./include/linux/fortify-string.h:114:33: error: ‘__builtin_memcpy’ accessing 18446744073709551605 or more bytes at offsets 0 and 0 overlaps 9223372036854775787 bytes at offset -9223372036854775798 [-Werror=restrict] 114 | #define __underlying_memcpy __builtin_memcpy | ^ ./include/linux/fortify-string.h:637:9: note: in expansion of macro ‘__underlying_memcpy’ 637 | __underlying_##op(p, q, __fortify_size); \ | ^~~~~~~~~~~~~ ./include/linux/fortify-string.h:682:26: note: in expansion of macro ‘__fortify_memcpy_chk’ 682 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \ | ^~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/ath/ath12k/wow.c:232:25: note: in expansion of macro ‘memcpy’ 232 | memcpy(pat, eth_pat, eth_pat_len); | ^~~~~~ The sum of size_t operands can overflow SIZE_MAX, triggering the warning. Address the issue using the suitable helper. Fixes: 4a3c212eee0e ("wifi: ath12k: add basic WoW functionalities") Signed-off-by: Paolo Abeni Reviewed-by: Kees Cook Acked-by: Jeff Johnson Tested-by: Paul E. McKenney --- Only built tested. Sending directly to net to reduce the RTT, but no objections to go through the WiFi tree first --- drivers/net/wireless/ath/ath12k/wow.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath12k/wow.c b/drivers/net/wireless/ath/ath12k/wow.c index c5cba825a84a..bead19db2c9a 100644 --- a/drivers/net/wireless/ath/ath12k/wow.c +++ b/drivers/net/wireless/ath/ath12k/wow.c @@ -186,7 +186,7 @@ ath12k_wow_convert_8023_to_80211(struct ath12k *ar, if (eth_pkt_ofs < ETH_ALEN) { pkt_ofs = eth_pkt_ofs + a1_ofs; - if (eth_pkt_ofs + eth_pat_len < ETH_ALEN) { + if (size_add(eth_pkt_ofs, eth_pat_len) < ETH_ALEN) { memcpy(pat, eth_pat, eth_pat_len); memcpy(bytemask, eth_bytemask, eth_pat_len); @@ -228,7 +228,7 @@ ath12k_wow_convert_8023_to_80211(struct ath12k *ar, } else if (eth_pkt_ofs < prot_ofs) { pkt_ofs = eth_pkt_ofs - ETH_ALEN + a3_ofs; - if (eth_pkt_ofs + eth_pat_len < prot_ofs) { + if (size_add(eth_pkt_ofs, eth_pat_len) < prot_ofs) { memcpy(pat, eth_pat, eth_pat_len); memcpy(bytemask, eth_bytemask, eth_pat_len);