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[2620:137:e000::1:20]) by mx.google.com with ESMTP id f9-20020a056a001ac900b00561f08fbfa1si16106771pfv.11.2022.10.11.12.42.32; Tue, 11 Oct 2022 12:42:44 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=aMz05sO0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230052AbiJKTGL (ORCPT + 99 others); Tue, 11 Oct 2022 15:06:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230072AbiJKTF5 (ORCPT ); Tue, 11 Oct 2022 15:05:57 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 61E97B85D; Tue, 11 Oct 2022 12:05:53 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 17A49B8166B; Tue, 11 Oct 2022 19:05:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8853AC433D6; Tue, 11 Oct 2022 19:05:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665515150; bh=ODHx9TW1R0DNxJe9ifRLST7AHBUBOdF+OZpirGF8FL0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aMz05sO0s6UGqiZQacsgQpXGjClkqOx8sQLzSH3vIt49HhKC0i+B+Z+4fssQXq0b4 00S+4RQjeiJYsw2p688732UayPfQukF1wcY46jNLHsREM9avaAnXOxyaD8cUVUxrGR pptN0uVjoEk1KWLe0gJtb8kqhJrus0Rg/OTAMbUBKvMryLX6ETM3ee+aFDnaZefZ+c bcXRZ9NJIQxvaXjmH76ymH3ACT8kvTZqc5T+k5OpW1pw5M+wcfSg0XjgSAIOrivKnU qbk51fk74ONUwne1ShIFKrTSYjA5P+N6AdE4HsyYmKxy4hk7vyMXTCYcoYAn3QGr3A SDqYwfsIBnN5w== Date: Tue, 11 Oct 2022 12:05:48 -0700 From: Josh Poimboeuf To: Peter Zijlstra Cc: Linus Torvalds , Andrew Morton , Alexander Potapenko , Andrey Konovalov , mm-commits@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] kasan: disable stackleak plugin in report code Message-ID: <20221011190548.blixlqj6dripitaf@treble> References: <20221008132113.919b9b894426297de78ac00f@linux-foundation.org> <20221011184444.npthr2pmzqb32x6z@treble> <20221011185907.s3kakdlrxcqr6boh@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20221011185907.s3kakdlrxcqr6boh@treble> X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org kasan_report() has a uaccess critical section which can't have any instrumentation calls in the middle. Disable the stackleak plugin for the report code. Fixes the following warning: vmlinux.o: warning: objtool: kasan_report+0x12: call to stackleak_track_stack() with UACCESS enabled Reported-by: Linus Torvalds Signed-off-by: Josh Poimboeuf --- mm/kasan/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile index d4837bff3b60..da2976365197 100644 --- a/mm/kasan/Makefile +++ b/mm/kasan/Makefile @@ -27,7 +27,7 @@ CFLAGS_common.o := $(CC_FLAGS_KASAN_RUNTIME) CFLAGS_generic.o := $(CC_FLAGS_KASAN_RUNTIME) CFLAGS_init.o := $(CC_FLAGS_KASAN_RUNTIME) CFLAGS_quarantine.o := $(CC_FLAGS_KASAN_RUNTIME) -CFLAGS_report.o := $(CC_FLAGS_KASAN_RUNTIME) +CFLAGS_report.o := $(CC_FLAGS_KASAN_RUNTIME) $(DISABLE_STACKLEAK_PLUGIN) CFLAGS_report_generic.o := $(CC_FLAGS_KASAN_RUNTIME) CFLAGS_report_hw_tags.o := $(CC_FLAGS_KASAN_RUNTIME) CFLAGS_report_sw_tags.o := $(CC_FLAGS_KASAN_RUNTIME) -- 2.37.3