From patchwork Mon Jun 1 05:10:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Walter Wu X-Patchwork-Id: 11581243 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 8C65B1391 for ; Mon, 1 Jun 2020 05:19:09 +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 5CA32206C3 for ; Mon, 1 Jun 2020 05:19:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="I0B/LjHm"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="DoVUV87u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5CA32206C3 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=18x6AxQJOm1HFJBcWZ14MX2HQKEn2bYU2b7CPioIZew=; b=I0B/LjHmUPPY6f wWrUkQdIazXITieR4MwJKPTOUap75ntaOcKPEj7M6fRJvV2oqOlOkm6pnZ3BS4Q6HslAc452BHXUo GsQJ/T/TiylAblf8lwU/ySFtqf5d962yWan69yKSNkR+qMypqATWwh+Pj4jWDdF8FLjzbN3V8g5/P 9H961VOPP9dqnqBa8372EaJj0yCWCYi9o+eldg9hXggol7lUPGT/Nwxi5bKGGJs7Po9Q2ndHA7ZHf Tgq5NQPymHCNX6poITgwGFts8yjFPDz5kHzhC1jJwwfMSsNUttse+NDrzCPstPFZyiwv2Wsc2ye7j qOLhaLK4bAmOF2Nma05Q==; 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 1jfcqn-0007Ih-KH; Mon, 01 Jun 2020 05:19:05 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jfcql-0007I1-G1; Mon, 01 Jun 2020 05:19:04 +0000 X-UUID: 84cd71ba3368496883757330a86e0670-20200531 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=yDR7fBW0w3Clej91Pw1AhT0fTfnOfzcSfnAFnKMCDeY=; b=DoVUV87uBxkEMmplz4/xEp9cu/u1MtfoPsZnxc8qj6gmpZbdnqzzt5wyLPDMWDKogyz9GJgBoHlZOwPorARoytXhxe0aeVSrn4toZuDySoMBGbEpYNyGjAdB9IHSLZPLcgksYcX97rLZVdqarAovJ2alQqRnpct0GLhqHwwgBQ8=; X-UUID: 84cd71ba3368496883757330a86e0670-20200531 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1201449112; Sun, 31 May 2020 21:18:42 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 31 May 2020 22:10:55 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 1 Jun 2020 13:10:41 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 1 Jun 2020 13:10:41 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger Subject: [PATCH v7 3/4] kasan: add tests for call_rcu stack recording Date: Mon, 1 Jun 2020 13:10:45 +0800 Message-ID: <20200601051045.1294-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-SNTS-SMTP: D8A8F87A7EBE82FF4344D1D95091710F4072036184D117EAF9E3DB45434009172000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200531_221903_539815_5BC2EFA1 X-CRM114-Status: UNSURE ( 9.27 ) X-CRM114-Notice: Please train this message. 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Signed-off-by: Walter Wu Reviewed-and-tested-by: Dmitry Vyukov Reviewed-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Matthias Brugger --- Changes since v6: - renamed the variable name in testcase --- lib/test_kasan.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index e3087d90e00d..19c72c1501ef 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_rcu_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_rcu_ptr = rcu_dereference_protected(ptr, NULL); + call_rcu(&global_rcu_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);