From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 047A52B9C7; Sun, 1 Sep 2024 16:41:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725208864; cv=none; b=Y47qlLylvQEkHZfQlCmQ437hRPrJax8CcGJcZ0tX41WgFuUA2C1gt2D0faw1MsP28Tq6mI1HyWZ/wYIBiwgWX6q1jrtH6TMGJaVyQOnIkFroUbGUqurYiQHb/tOkc1tk5wkfgaGKWpJOXEr3hGhyxB+zqWEV/+Tk78SRtKR8gf8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725208864; c=relaxed/simple; bh=Z5AmqEonwEYnlDpVn/UNRVe1GElhhBxNgc3BHK4Lrr4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MAzfQxyqBNheXKXSFFoEQvlssiTvU0VVGzo749l5bJKjgWd2slu2IyYWiKYoy5Gq4E/aMEhneyAeCjOa2XMqSbXvOdlEKgfyKr7aqqa79A8zLHDgVyrXu7ZHJ6REB7ikl8lxmc3af794VVdADet/3Z9zLYWu8WV7AMippyl+6hs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NYjOn/1c; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="NYjOn/1c" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71F7FC4CEC3; Sun, 1 Sep 2024 16:41:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725208863; bh=Z5AmqEonwEYnlDpVn/UNRVe1GElhhBxNgc3BHK4Lrr4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NYjOn/1coeza0b/5uTaRCkeyn5D44rhBqaBAqGY+WtTNFVOdz+SrWXYK9N08AsV19 Lj4+rD6F5RDSo6UGQrmkohSaS9IfsF8SvfeV/SWlKNF2azCogdb420fN+rPuGAjSx5 rQPDIRnKGGjQHzo9keSHEB52rbfzzCvn6TWwfe0k= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 5.4 063/134] Bluetooth: bnep: Fix out-of-bound access Date: Sun, 1 Sep 2024 18:16:49 +0200 Message-ID: <20240901160812.474083819@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240901160809.752718937@linuxfoundation.org> References: <20240901160809.752718937@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luiz Augusto von Dentz [ Upstream commit 0f0639b4d6f649338ce29c62da3ec0787fa08cd1 ] This fixes attempting to access past ethhdr.h_source, although it seems intentional to copy also the contents of h_proto this triggers out-of-bound access problems with the likes of static analyzer, so this instead just copy ETH_ALEN and then proceed to use put_unaligned to copy h_proto separetely. Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- net/bluetooth/bnep/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c index 43c284158f63e..089160361dded 100644 --- a/net/bluetooth/bnep/core.c +++ b/net/bluetooth/bnep/core.c @@ -385,7 +385,8 @@ static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb) case BNEP_COMPRESSED_DST_ONLY: __skb_put_data(nskb, skb_mac_header(skb), ETH_ALEN); - __skb_put_data(nskb, s->eh.h_source, ETH_ALEN + 2); + __skb_put_data(nskb, s->eh.h_source, ETH_ALEN); + put_unaligned(s->eh.h_proto, (__be16 *)__skb_put(nskb, 2)); break; case BNEP_GENERAL: -- 2.43.0