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 8715324E4A9; Tue, 29 Apr 2025 17:47:29 +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=1745948849; cv=none; b=ocJ1JHOdjIoNtDTsHKjTDsze+F1jAFID3WVh8F9SL8ccpu7UQbsHlZn3zGTYCi/DbpSYYANZu2yfZHDFHKLLsQCIoCUiv6wN+oxW+JZJI8jEthV5HYdwFYOKJXnXiMvz5bcrSQkOfd1Sayg2vTPfs5wdMR4Z+vVc1s9xAfee9d8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745948849; c=relaxed/simple; bh=l1FFNF6f2KEXL33dpqIlOqzLRMov4cDRl530iyDX1SQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fsK9nGAQncOrgGItKLilVlu63VvIMIokVokdEt7+yOo27DHaF/HCcqmyEC1P6MXljyrNIZVGOIMVsZMVFd/ADlNLjNOA9d6GXbw0EIlXsz0gP7VXWxChtoaLp4gS3Zvuk9OPBpk7jxmQWKLR285zAoGhyuV7Hq/cODsRM0PYWGc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MNtre3l8; 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="MNtre3l8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 192AAC4CEE3; Tue, 29 Apr 2025 17:47:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745948849; bh=l1FFNF6f2KEXL33dpqIlOqzLRMov4cDRl530iyDX1SQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MNtre3l8L3J56kRUdyaG04PrW6icHuWbwewDl9dKIWljKnZsZP3cANmF5ZgjrUa/w rgUEcXj1nwifo5mZvhXbkJBhoQA3TZcdlm+P3lsfpEOhApNIjazSQ76Z9bFaFX+7Ns eOKJugaylG+Bpq393fX3Y/PqKZ0wupPYY1162uc0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Hans de Goede , Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 5.15 137/373] Bluetooth: btrtl: Prevent potential NULL dereference Date: Tue, 29 Apr 2025 18:40:14 +0200 Message-ID: <20250429161128.804383129@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250429161123.119104857@linuxfoundation.org> References: <20250429161123.119104857@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter [ Upstream commit 324dddea321078a6eeb535c2bff5257be74c9799 ] The btrtl_initialize() function checks that rtl_load_file() either had an error or it loaded a zero length file. However, if it loaded a zero length file then the error code is not set correctly. It results in an error pointer vs NULL bug, followed by a NULL pointer dereference. This was detected by Smatch: drivers/bluetooth/btrtl.c:592 btrtl_initialize() warn: passing zero to 'ERR_PTR' Fixes: 26503ad25de8 ("Bluetooth: btrtl: split the device initialization into smaller parts") Signed-off-by: Dan Carpenter Reviewed-by: Hans de Goede Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- drivers/bluetooth/btrtl.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c index 1f8afa0244d85..1918e60caa91e 100644 --- a/drivers/bluetooth/btrtl.c +++ b/drivers/bluetooth/btrtl.c @@ -677,6 +677,8 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev, rtl_dev_err(hdev, "mandatory config file %s not found", btrtl_dev->ic_info->cfg_name); ret = btrtl_dev->cfg_len; + if (!ret) + ret = -EINVAL; goto err_free; } } -- 2.39.5