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 028401534EC; Sun, 28 Jul 2024 16:09:19 +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=1722182960; cv=none; b=AYhoUP9SpiT1Sm4wOFitJaDUskwIDQJAMRQYIy13x/pJYITQqzXjP6QBoYPdvjNPUuhJsoSJBR4mkVGQA+rWnwyKtjcIzJ5dtAK0iRppB7w+XybmbJ1fnftSbk2QXwsJ4P74laLqXO1bjf1wtwy21GbKv/KMGDLcGeoU6Mhhues= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722182960; c=relaxed/simple; bh=O1orXoIgbNcTl70cjmRw394bi1YKlzTuo40EbWq0OCs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s+VNNRoL16Vf4cEGQlunXvw+JjMfkrRbOlDlyTu53WR+fAXCzcSidbfUJS9d5AA2h7NZRc71ufiuXLPXzzHLAORZUugK0MP0ahGc6azH0i5ZjPoWm4vpHl6rA4Ku9C2/WSpvQ3/YINpk2AduVksJyiCg+M4APQnu08/xm3rV/c8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lkGJuxiX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lkGJuxiX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFE21C32782; Sun, 28 Jul 2024 16:09:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722182959; bh=O1orXoIgbNcTl70cjmRw394bi1YKlzTuo40EbWq0OCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lkGJuxiXiqHHc93QUNtfbajpgtJ1PC2YF0RGrZypz6tO8AbL8ja75acg1YVnpWAIW WInEQMsAbrKe7Eh8tyre/7NQYoPtXHOT/cwqcAiwtteudV+5RfEx7cfVspw4pQWEg6 fyBuu2kF9S0rLTjvL1KNi35J0cLgdaGtm+20Y+Vgb0JwM1GpLAK0oI/+juoe44aacH K5ej3/iHszEoEdTGU0fXYmKd5HtZinkJ28RvA+qCV+iOBb/1ois5E5RCwK4IgM2xzV wTF4ER1fca/wxfy+hbOJv/T5GN8HlQClYPsq1J63vlZ7DTnm7xnNTbqfjt34uS5VTH ZawRnukv5lr+g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Abhishek Pandit-Subedi , Benson Leung , Heikki Krogerus , Jameson Thies , Dmitry Baryshkov , Greg Kroah-Hartman , Sasha Levin , pmalani@chromium.org, lk@c--e.de, saranya.gopal@intel.com, linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 05/13] usb: typec: ucsi: Fix null pointer dereference in trace Date: Sun, 28 Jul 2024 12:08:47 -0400 Message-ID: <20240728160907.2053634-5-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240728160907.2053634-1-sashal@kernel.org> References: <20240728160907.2053634-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.164 Content-Transfer-Encoding: 8bit From: Abhishek Pandit-Subedi [ Upstream commit 99516f76db48e1a9d54cdfed63c1babcee4e71a5 ] ucsi_register_altmode checks IS_ERR for the alt pointer and treats NULL as valid. When CONFIG_TYPEC_DP_ALTMODE is not enabled, ucsi_register_displayport returns NULL which causes a NULL pointer dereference in trace. Rather than return NULL, call typec_port_register_altmode to register DisplayPort alternate mode as a non-controllable mode when CONFIG_TYPEC_DP_ALTMODE is not enabled. Reviewed-by: Benson Leung Reviewed-by: Heikki Krogerus Signed-off-by: Abhishek Pandit-Subedi Signed-off-by: Jameson Thies Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20240510201244.2968152-2-jthies@google.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/typec/ucsi/ucsi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h index 3dc3da8dbbdf8..656a53ccd8917 100644 --- a/drivers/usb/typec/ucsi/ucsi.h +++ b/drivers/usb/typec/ucsi/ucsi.h @@ -368,7 +368,7 @@ ucsi_register_displayport(struct ucsi_connector *con, bool override, int offset, struct typec_altmode_desc *desc) { - return NULL; + return typec_port_register_altmode(con->port, desc); } static inline void -- 2.43.0