Return-path: Received: from mout.kundenserver.de ([212.227.126.134]:64652 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752109AbdCBQsW (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 25/26] isdn: eicon: mark divascapi incompatible with kasan Date: Thu, 2 Mar 2017 17:38:33 +0100 Message-Id: <20170302163834.2273519-26-arnd@arndb.de> (sfid-20170302_175431_464541_EADCC7F8) 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 enabled, we have several functions that use rather large kernel stacks, e.g. drivers/isdn/hardware/eicon/message.c: In function 'group_optimization': drivers/isdn/hardware/eicon/message.c:14841:1: warning: the frame size of 864 bytes is larger than 500 bytes [-Wframe-larger-than=] drivers/isdn/hardware/eicon/message.c: In function 'add_b1': drivers/isdn/hardware/eicon/message.c:7925:1: warning: the frame size of 1008 bytes is larger than 500 bytes [-Wframe-larger-than=] drivers/isdn/hardware/eicon/message.c: In function 'add_b23': drivers/isdn/hardware/eicon/message.c:8551:1: warning: the frame size of 928 bytes is larger than 500 bytes [-Wframe-larger-than=] drivers/isdn/hardware/eicon/message.c: In function 'sig_ind': drivers/isdn/hardware/eicon/message.c:6113:1: warning: the frame size of 2112 bytes is larger than 500 bytes [-Wframe-larger-than=] To be on the safe side, and to enable a lower frame size warning limit, let's just mark this driver as broken when KASAN is in use. I have tried to reduce the stack size as I did with dozens of other drivers, but failed to come up with a good solution for this one. Signed-off-by: Arnd Bergmann --- drivers/isdn/hardware/eicon/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/isdn/hardware/eicon/Kconfig b/drivers/isdn/hardware/eicon/Kconfig index 6082b6a5ced3..b64496062421 100644 --- a/drivers/isdn/hardware/eicon/Kconfig +++ b/drivers/isdn/hardware/eicon/Kconfig @@ -31,6 +31,7 @@ config ISDN_DIVAS_PRIPCI config ISDN_DIVAS_DIVACAPI tristate "DIVA CAPI2.0 interface support" + depends on !KASAN || BROKEN help You need this to provide the CAPI interface for DIVA Server cards. -- 2.9.0