From patchwork Fri Jan 22 14:11:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincenzo Frascino X-Patchwork-Id: 12039513 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=-16.9 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 E4935C433DB for ; Fri, 22 Jan 2021 14:13:01 +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 9CB3223A5C for ; Fri, 22 Jan 2021 14:13:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9CB3223A5C 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=hFGmcapJPjNUeTLlriAgxpioGZHGe0flw3bNJooSONo=; b=egfr1E0DPW8dhaiSmiQQgMTx3 fyDAOjqFsMjSU8nIBiaIHYVfh2lU3zD7Lynzx+7+teTTaPCrwiDuKl9oE+UUZzEMTNYecgFcGydZF J2+qT+154GnCLYFcsdjH34hDlfsS09cAgE0JGZqQZgWuo1Em35sCyyqtiXKAq6VoIFsEnrYiuLI20 TVPGjYHRmZWxt5gVIrCAIAErOvUI5XZOOlOvozJ2ZEiU1xboNtZxAkcpCG4Td7wO5NyivzEUouBfw f5ozv230wmGjBZXbIPe9qk4teiZ5IPTbnTXlPPYaauinooMGUdEtrNJed7x6OTmHzH7jNJiaSQq2p b76h0sLwg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l2xAJ-0004Q0-05; Fri, 22 Jan 2021 14:11:55 +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 1l2xA5-0004MW-Ik for linux-arm-kernel@lists.infradead.org; Fri, 22 Jan 2021 14:11:42 +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 33C9F1570; Fri, 22 Jan 2021 06:11:41 -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 879743F66E; Fri, 22 Jan 2021 06:11:39 -0800 (PST) From: Vincenzo Frascino To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v7 3/4] kasan: Add report for async mode Date: Fri, 22 Jan 2021 14:11:24 +0000 Message-Id: <20210122141125.36166-4-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210122141125.36166-1-vincenzo.frascino@arm.com> References: <20210122141125.36166-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210122_091141_710557_92EA2B36 X-CRM114-Status: GOOD ( 12.42 ) 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 , 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 Signed-off-by: Vincenzo Frascino --- include/linux/kasan.h | 2 ++ mm/kasan/report.c | 13 +++++++++++++ 2 files changed, 15 insertions(+) diff --git a/include/linux/kasan.h b/include/linux/kasan.h index bb862d1f0e15..b0a1d9dfa85c 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -351,6 +351,8 @@ static inline void *kasan_reset_tag(const void *addr) bool kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip); +void kasan_report_async(void); + #else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */ static inline void *kasan_reset_tag(const void *addr) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 234f35a84f19..1390da06a988 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -358,6 +358,19 @@ void kasan_report_invalid_free(void *object, unsigned long ip) end_report(&flags); } +#if defined(CONFIG_KASAN_SW_TAGS) || defined(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"); + dump_stack(); + end_report(&flags); +} +#endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */ + static void __kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip) {