From patchwork Fri May 22 02:01:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Walter Wu X-Patchwork-Id: 11564347 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E167090 for ; Fri, 22 May 2020 02:02:09 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 C04A720825 for ; Fri, 22 May 2020 02:02:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="RbXQgYki"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="H2iF5wuN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C04A720825 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References: List-Owner; bh=bdMylE9cRTBHTkBdSNCFuIwJ00ct9ccLAXSzOVAPqvQ=; b=RbXQgYkio/O5at FxYCASRs6VOfH9djPthFxIOchXaKPx2an896qlHDZpZVU84oPzqNu0yD6qY0U/Lt1ecfrQi1+nZnw dUC++Z+HInWWKHI5xkdpXi49lrZolnxNVdlvQ+SdV4OhYC6RXUCDaPLbievqoDXlJzhMYHKOCkECE UcnyniqTIzi2QncWqY+o4kWskERzNbYVqS0Sh/jCuHb6Con0WddFSeIpdu6QQulRGBd7qZo12z+ga GpRAwxGe6ihCaRTl28UEBDg38whMsJ4nmH6uwmwzgTtou8GyBKcwq+AULg14wCkSB/ECGMJewgx87 mTi1IeyBlFXNzJvXa6dQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbx0c-0001BT-UY; Fri, 22 May 2020 02:02:02 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbx0Y-00018z-Dx; Fri, 22 May 2020 02:02:00 +0000 X-UUID: 370c5dc27eea4f95a7d6f9babb3040b5-20200521 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=DbdlJu8vuZUyyQAeAhd6YD50kjTkWp9bEKvDh4VAu5A=; b=H2iF5wuNTraJnSdG7Ffis1XK7pyl3iR2z+l9XEAeYzo/8VWbcCPQ68hrW4TGFXoIKLDO22wJOB9a7zmIp0IAS2313vnVCuMbemcW/gwTHv2biWrbg+7MR9KtEuaxOBFxuI8c+jx6DAaiJtfQtb5VuGGVbkNwrl+q6+rPo3mMAUA=; X-UUID: 370c5dc27eea4f95a7d6f9babb3040b5-20200521 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1930356894; Thu, 21 May 2020 18:01:47 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 21 May 2020 19:01:53 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 22 May 2020 10:01:52 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 22 May 2020 10:01:51 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger Subject: [PATCH v6 3/4] kasan: add tests for call_rcu stack recording Date: Fri, 22 May 2020 10:01:51 +0800 Message-ID: <20200522020151.23405-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-SNTS-SMTP: 1DF83D308094557B8096DD8171A9C524EA3231510A950D2F5EB96F4701E47C662000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200521_190158_481930_003631DF X-CRM114-Status: UNSURE ( 8.52 ) X-CRM114-Notice: Please train this message. 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Signed-off-by: Walter Wu Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Alexander Potapenko Cc: Matthias Brugger --- lib/test_kasan.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index e3087d90e00d..6e5fb05d42d8 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -792,6 +792,35 @@ static noinline void __init vmalloc_oob(void) static void __init vmalloc_oob(void) {} #endif +static struct kasan_rcu_info { + int i; + struct rcu_head rcu; +} *global_ptr; + +static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp) +{ + struct kasan_rcu_info *fp = container_of(rp, + struct kasan_rcu_info, rcu); + + kfree(fp); + fp->i = 1; +} + +static noinline void __init kasan_rcu_uaf(void) +{ + struct kasan_rcu_info *ptr; + + pr_info("use-after-free in kasan_rcu_reclaim\n"); + ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + global_ptr = rcu_dereference_protected(ptr, NULL); + call_rcu(&global_ptr->rcu, kasan_rcu_reclaim); +} + static int __init kmalloc_tests_init(void) { /* @@ -839,6 +868,7 @@ static int __init kmalloc_tests_init(void) kasan_bitops(); kmalloc_double_kzfree(); vmalloc_oob(); + kasan_rcu_uaf(); kasan_restore_multi_shot(multishot);