From patchwork Fri Jan 29 18:49:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 12056341 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4EB1C433E6 for ; Fri, 29 Jan 2021 18:50:34 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7C99664DE7 for ; Fri, 29 Jan 2021 18:50:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C99664DE7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=uVtO7QJJgCqgHuPvtZOC5sdKL1uMjfOiDBPVUotntFg=; b=NiqRGFZou0Y2zMQVBGt9DsuSc ldi6grYxU6MrDtBV8Y4cvhw65vc9cQLGKE+75s6Vmn980zA5ZTedeNNOJcAXrS1CXHn/jOJpcb/dp AmuKUEih4O9O3NbJqRKDdVzo0iaaLx2uvSIhYEFoyEMnJjvKsZsd1NuJYVxyU7EdNRLE9K8USgkaV lsMaX9goUE1twG3Xp3Nd677K/3yAN3Y1PRr8I/CRwXJnYuReMYtHf5H67w6bxkkxZaxRm1A/ge7hc 2L4i5VAnfHxOrP1KrpPZTh62erFIij9E+8DyeqKXUC3PvSKpXzj4neLzZ7UlGjJA/W287M7b+PTdZ 9sVOJetQQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5Ypr-0003mN-9f; Fri, 29 Jan 2021 18:49:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5Ypd-0003jm-Ro for linux-arm-kernel@lists.infradead.org; Fri, 29 Jan 2021 18:49:23 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 49CC01515; Fri, 29 Jan 2021 10:49:21 -0800 (PST) Received: from e119884-lin.cambridge.arm.com (e119884-lin.cambridge.arm.com [10.1.196.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 821C73F885; Fri, 29 Jan 2021 10:49:19 -0800 (PST) From: Vincenzo Frascino To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v10 3/4] kasan: Add report for async mode Date: Fri, 29 Jan 2021 18:49:04 +0000 Message-Id: <20210129184905.29760-4-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210129184905.29760-1-vincenzo.frascino@arm.com> References: <20210129184905.29760-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210129_134922_002171_386806DB X-CRM114-Status: GOOD ( 13.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marco Elver , Catalin Marinas , Branislav Rankov , Alexander Potapenko , Evgenii Stepanov , Andrey Konovalov , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Will Deacon , Dmitry Vyukov Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org KASAN provides an asynchronous mode of execution. Add reporting functionality for this mode. Cc: Dmitry Vyukov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Andrey Konovalov Reviewed-by: Andrey Konovalov Tested-by: Andrey Konovalov Signed-off-by: Vincenzo Frascino --- include/linux/kasan.h | 6 ++++++ mm/kasan/report.c | 18 +++++++++++++++++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 1011e4f30284..6d8f3227c264 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -367,6 +367,12 @@ static inline void *kasan_reset_tag(const void *addr) #endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS*/ +#ifdef CONFIG_KASAN_HW_TAGS + +void kasan_report_async(void); + +#endif /* CONFIG_KASAN_HW_TAGS */ + #ifdef CONFIG_KASAN_SW_TAGS void __init kasan_init_sw_tags(void); #else diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 87b271206163..3a73199c0f5e 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -87,7 +87,9 @@ static void start_report(unsigned long *flags) static void end_report(unsigned long *flags, unsigned long addr) { - trace_error_report_end(ERROR_DETECTOR_KASAN, addr); + if (addr) + trace_error_report_end(ERROR_DETECTOR_KASAN, addr); + pr_err("==================================================================\n"); add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE); spin_unlock_irqrestore(&report_lock, *flags); @@ -360,6 +362,20 @@ void kasan_report_invalid_free(void *object, unsigned long ip) end_report(&flags, (unsigned long)object); } +#ifdef CONFIG_KASAN_HW_TAGS +void kasan_report_async(void) +{ + unsigned long flags; + + start_report(&flags); + pr_err("BUG: KASAN: invalid-access\n"); + pr_err("Asynchronous mode enabled: no access details available\n"); + pr_err("\n"); + dump_stack(); + end_report(&flags, 0); +} +#endif /* CONFIG_KASAN_HW_TAGS */ + static void __kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip) {