From patchwork Sun Sep 10 19:29:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 721378 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6959CEE49A4 for ; Sun, 10 Sep 2023 19:29:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230009AbjIJT3k (ORCPT ); Sun, 10 Sep 2023 15:29:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229973AbjIJT3h (ORCPT ); Sun, 10 Sep 2023 15:29:37 -0400 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E0A3188; Sun, 10 Sep 2023 12:29:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1694374163; bh=iXISKFMxSwqsbdiN0L+f35DyWarIGiJQLnukw86Cd9E=; h=From:Date:Subject:To:Cc:From; b=mP26J0GdNnotkg3mALjkDU0d39CK1f9tY9aHj4s29fAAI5MTUbJPZEOu4CmNLdIbj aSb59dErQldEOCtmNFJCj4KXMXCtgyUm33S+dwtsX84QF0YIlWM2FwLqfbxuqjrrGS zsHeyCAJDepqbB+1A4JnAle0SEFB0vlIDVCYa3Ig= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Sun, 10 Sep 2023 21:29:01 +0200 Subject: [PATCH] selftests/nolibc: libc-test: avoid -Wstringop-overflow warnings MIME-Version: 1.0 Message-Id: <20230910-nolibc-poll-fault-v1-1-2b7a16f48259@weissschuh.net> X-B4-Tracking: v=1; b=H4sIAPwY/mQC/x3MTQ5AMBBA4avIrE3SHwRXEYtiyiRNKy0iEXfXW H6L9x5IFJkS9MUDkS5OHHyGLAuYN+NXQl6yQQmlRScF+uB4mnEPzqE1pzuwkrUyTasbsi3kbo9 k+f6fw/i+H1r5xIRjAAAA To: Willy Tarreau , Shuah Khan Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1694374162; l=4663; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=iXISKFMxSwqsbdiN0L+f35DyWarIGiJQLnukw86Cd9E=; b=2Iv84yGEzPB3mR/55/KWES0iOYVZ3GzoiKHeBxC3wYsv2No1p5GPnI7dVzIm8/t4CgNVyp5xD aZ5RJezVFhmCXxOsWQSKhrwJmajxvT4FMs8pMuXhI8G78HSf7D4gAi6 X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Newer versions of glibc annotate the poll() function with __attribute__(access) which triggers a compiler warning inside the testcase poll_fault. Avoid this by using a plain NULL which is enough for the testcase. To avoid potential future warnings also adapt the other EFAULT testcases, except select_fault as NULL is a valid value for its argument. nolibc-test.c: In function ‘run_syscall’: nolibc-test.c:338:62: warning: ‘poll’ writing 8 bytes into a region of size 0 overflows the destination [-Wstringop-overflow=] 338 | do { if (!(cond)) result(llen, SKIPPED); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ nolibc-test.c:341:9: note: in expansion of macro ‘EXPECT_SYSER2’ 341 | EXPECT_SYSER2(cond, expr, expret, experr, 0) | ^~~~~~~~~~~~~ nolibc-test.c:905:47: note: in expansion of macro ‘EXPECT_SYSER’ 905 | CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break; | ^~~~~~~~~~~~ cc1: note: destination object is likely at address zero In file included from /usr/include/poll.h:1, from nolibc-test.c:33: /usr/include/sys/poll.h:54:12: note: in a call to function ‘poll’ declared with attribute ‘access (write_only, 1, 2)’ 54 | extern int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) | ^~~~ Signed-off-by: Thomas Weißschuh --- tools/testing/selftests/nolibc/nolibc-test.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- base-commit: f7a6e4791e3d685eddca29b5d16d183ee0407caa change-id: 20230910-nolibc-poll-fault-4152a6836ef8 Best regards, diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index e2b70641a1e7..a0478f8eaee8 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -895,14 +895,14 @@ int run_syscall(int min, int max) CASE_TEST(lseek_0); EXPECT_SYSER(1, lseek(0, 0, SEEK_SET), -1, ESPIPE); break; CASE_TEST(mkdir_root); EXPECT_SYSER(1, mkdir("/", 0755), -1, EEXIST); break; CASE_TEST(mmap_bad); EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break; - CASE_TEST(munmap_bad); EXPECT_SYSER(1, munmap((void *)1, 0), -1, EINVAL); break; + CASE_TEST(munmap_bad); EXPECT_SYSER(1, munmap(NULL, 0), -1, EINVAL); break; CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break; CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break; CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; - CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break; + CASE_TEST(poll_fault); EXPECT_SYSER(1, poll(NULL, 1, 0), -1, EFAULT); break; CASE_TEST(prctl); EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break; CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break; CASE_TEST(rmdir_blah); EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break; @@ -911,7 +911,7 @@ int run_syscall(int min, int max) CASE_TEST(select_stdout); EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break; CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break; CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break; - CASE_TEST(stat_fault); EXPECT_SYSER(1, stat((void *)1, &stat_buf), -1, EFAULT); break; + CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break; CASE_TEST(stat_timestamps); EXPECT_SYSZR(1, test_stat_timestamps()); break; CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break; CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;