Return-path: Received: from mout.kundenserver.de ([212.227.126.187]:63388 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753074AbdCBQsW (ORCPT ); Thu, 2 Mar 2017 11:48:22 -0500 From: Arnd Bergmann To: kasan-dev@googlegroups.com Cc: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-wireless@vger.kernel.org, kernel-build-reports@lists.linaro.org, "David S . Miller" , Arnd Bergmann Subject: [PATCH 21/26] drm/bridge: ps8622: reduce stack size for KASAN Date: Thu, 2 Mar 2017 17:38:29 +0100 Message-Id: <20170302163834.2273519-22-arnd@arndb.de> (sfid-20170302_175429_772104_B88907C7) In-Reply-To: <20170302163834.2273519-1-arnd@arndb.de> References: <20170302163834.2273519-1-arnd@arndb.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: When CONFIG_KASAN is set, each call to ps8622_set() adds an object to the stack frame, leading to a warning about possible stack overflow: drivers/gpu/drm/bridge/parade-ps8622.c: In function 'ps8622_send_config': drivers/gpu/drm/bridge/parade-ps8622.c:338:1: error: the frame size of 5872 bytes is larger than 3072 bytes [-Werror=frame-larger-than=] Marking this as noinline_for_kasan completely avoids the problem. Signed-off-by: Arnd Bergmann --- drivers/gpu/drm/bridge/parade-ps8622.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c b/drivers/gpu/drm/bridge/parade-ps8622.c index ac8cc5b50d9f..6b995edd2a46 100644 --- a/drivers/gpu/drm/bridge/parade-ps8622.c +++ b/drivers/gpu/drm/bridge/parade-ps8622.c @@ -79,7 +79,7 @@ static inline struct ps8622_bridge * return container_of(connector, struct ps8622_bridge, connector); } -static int ps8622_set(struct i2c_client *client, u8 page, u8 reg, u8 val) +static noinline_for_kasan int ps8622_set(struct i2c_client *client, u8 page, u8 reg, u8 val) { int ret; struct i2c_adapter *adap = client->adapter; -- 2.9.0