From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 04F93D7235C for ; Fri, 23 Jan 2026 08:59:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iC/Xpu2q3+5trseP6r/03Uc/UV6sDAQu414uvWoGM6E=; b=ew5uuGiXnqBxoD Tc7223D81481vWjlXpLDnvCJ/xvlqwlv7fq5SaGZkGYHk7Kzq8mmrx0d8zZogXnrLBVR5hF1u0sA6 FKy2cL78DspoOma7slIgNwX5UpSfWtQ5CQlaL1gCUAYaah3ALKGIxa2vHm6d/Bzah2YaWSRM54eeN uFCXEV+0Z3RSMBpfL9+siXqOyUHdqhYfEKqSBhC9z6gU5HUOoLHz5NYU4e5PiIptaUSN1mrGOPxsR HzpvYPBdMMsrQVQk4rjFKNqc2sRYYHmhnjFmSUmutrAk4qUNxgyfBZsZIIVjpi77Nh8Jl3r66qXrz 9r9e6O2Bi+k3MwftuTqA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vjD0Q-00000008Vs5-3JWO; Fri, 23 Jan 2026 08:59:02 +0000 Received: from mailgw.kylinos.cn ([124.126.103.232]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vjD0L-00000008VnM-2rPw for linux-riscv@lists.infradead.org; Fri, 23 Jan 2026 08:58:59 +0000 X-UUID: bbe859c4f83911f0b0f03b4cfa9209d1-20260123 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.6,REQID:7b511442-f8cd-4e88-81b6-1d4bd35b595b,IP:0,UR L:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:-5 X-CID-META: VersionHash:a9d874c,CLOUDID:e30dc2a21e628c0af74cb2e043ddf3ea,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:81|82|102|850|898,TC:nil,Content:0|15|50 ,EDM:-3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,O SA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: bbe859c4f83911f0b0f03b4cfa9209d1-20260123 X-User: jiangfeng@kylinos.cn Received: from localhost.localdomain [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1554780634; Fri, 23 Jan 2026 16:58:49 +0800 From: Feng Jiang To: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, akpm@linux-foundation.org, kees@kernel.org, andy@kernel.org, jiangfeng@kylinos.cn, ebiggers@kernel.org, martin.petersen@oracle.com, mingo@kernel.org, charlie@rivosinc.com, conor.dooley@microchip.com, samuel.holland@sifive.com, linus.walleij@linaro.org, nathan@kernel.org Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Joel Stanley Subject: [PATCH v4 2/8] lib/string_kunit: add correctness test for strnlen() Date: Fri, 23 Jan 2026 16:58:35 +0800 Message-Id: <20260123085841.212468-3-jiangfeng@kylinos.cn> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260123085841.212468-1-jiangfeng@kylinos.cn> References: <20260123085841.212468-1-jiangfeng@kylinos.cn> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260123_005858_033780_1B40C686 X-CRM114-Status: UNSURE ( 8.82 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add a KUnit test for strnlen() to verify correctness across different string lengths and memory alignments. Suggested-by: Andy Shevchenko Signed-off-by: Feng Jiang Acked-by: Andy Shevchenko Tested-by: Joel Stanley --- lib/tests/string_kunit.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/lib/tests/string_kunit.c b/lib/tests/string_kunit.c index bc5130c6e5e9..991f01d52eb2 100644 --- a/lib/tests/string_kunit.c +++ b/lib/tests/string_kunit.c @@ -129,6 +129,38 @@ static void string_test_strlen(struct kunit *test) } } +static void string_test_strnlen(struct kunit *test) +{ + const size_t buf_size = STRING_TEST_MAX_LEN + STRING_TEST_MAX_OFFSET + 1; + size_t len, offset; + char *s; + + s = kunit_kzalloc(test, buf_size, GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, s); + + memset(s, 'A', buf_size); + s[buf_size - 1] = '\0'; + + for (offset = 0; offset < STRING_TEST_MAX_OFFSET; offset++) { + for (len = 0; len <= STRING_TEST_MAX_LEN; len++) { + s[offset + len] = '\0'; + + if (len > 0) + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len - 1), len - 1); + if (len > 1) + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len - 2), len - 2); + + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len), len); + + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len + 1), len); + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len + 2), len); + KUNIT_EXPECT_EQ(test, strnlen(s + offset, len + 10), len); + + s[offset + len] = 'A'; + } + } +} + static void string_test_strchr(struct kunit *test) { const char *test_string = "abcdefghijkl"; @@ -644,6 +676,7 @@ static struct kunit_case string_test_cases[] = { KUNIT_CASE(string_test_memset32), KUNIT_CASE(string_test_memset64), KUNIT_CASE(string_test_strlen), + KUNIT_CASE(string_test_strnlen), KUNIT_CASE(string_test_strchr), KUNIT_CASE(string_test_strnchr), KUNIT_CASE(string_test_strspn), -- 2.25.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv