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: 11581237 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 2221D60D for ; Mon, 1 Jun 2020 05:10:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E2E5E206C3 for ; Mon, 1 Jun 2020 05:10:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="DoVUV87u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E2E5E206C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2BBE1280002; Mon, 1 Jun 2020 01:10:56 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 26E148E0003; Mon, 1 Jun 2020 01:10:56 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1A80D280002; Mon, 1 Jun 2020 01:10:56 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0005.hostedemail.com [216.40.44.5]) by kanga.kvack.org (Postfix) with ESMTP id 0724A8E0003 for ; Mon, 1 Jun 2020 01:10:56 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id C81928B4D6 for ; Mon, 1 Jun 2020 05:10:55 +0000 (UTC) X-FDA: 76879468470.23.veil40_2510d38227f30 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin23.hostedemail.com (Postfix) with ESMTP id A988237604 for ; Mon, 1 Jun 2020 05:10:55 +0000 (UTC) X-Spam-Summary: 2,0,0,3c3e17ffb3082ff9,d41d8cd98f00b204,walter-zh.wu@mediatek.com,,RULES_HIT:41:355:379:541:800:960:966:973:988:989:1185:1260:1277:1311:1313:1314:1345:1431:1437:1514:1515:1516:1518:1534:1541:1585:1711:1730:1747:1777:1792:2196:2199:2393:2559:2562:2915:3138:3139:3140:3141:3142:3352:3865:3868:3870:3871:3872:4250:4385:5007:6119:6261:6653:7514:7875:8660:10004:10400:10450:10455:11026:11232:11658:11914:12043:12048:12291:12296:12297:12438:12521:12555:12683:12895:13069:13148:13230:13311:13357:14181:14394:14721:19904:19999:21080:21212:21451:21627:21939:21990:30029:30054:30069,0,RBL:210.61.82.184:@mediatek.com:.lbl8.mailshell.net-62.2.12.100 64.100.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: veil40_2510d38227f30 X-Filterd-Recvd-Size: 4646 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Mon, 1 Jun 2020 05:10:54 +0000 (UTC) X-UUID: 69160eabfc9d4a57b299d63ae5a5b5a1-20200601 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: 69160eabfc9d4a57b299d63ae5a5b5a1-20200601 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 638810319; Mon, 01 Jun 2020 13:10:49 +0800 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 CC: , , , , wsd_upstream , , Walter Wu 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-Rspamd-Queue-Id: A988237604 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000460, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Test call_rcu() call stack recording and verify whether it correctly is printed in KASAN report. 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);