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[2a02:1811:cc83:eef0:f2b6:6987:9238:41ca]) by smtp.gmail.com with ESMTPSA id o14-20020a170906774e00b006d5b915f27dsm7351657ejn.169.2022.04.27.15.46.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Apr 2022 15:46:23 -0700 (PDT) From: Niels Dossche To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mina Almasry , Niels Dossche Subject: [PATCH 2/2] selftest/vm: test that mremap fails on non-existent vma Date: Thu, 28 Apr 2022 00:44:39 +0200 Message-Id: <20220427224439.23828-3-dossche.niels@gmail.com> X-Mailer: git-send-email 2.35.2 In-Reply-To: <20220427224439.23828-1-dossche.niels@gmail.com> References: <20220427224439.23828-1-dossche.niels@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=deJz5bfr; spf=pass (imf03.hostedemail.com: domain of dossche.niels@gmail.com designates 209.85.218.53 as permitted sender) smtp.mailfrom=dossche.niels@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 157292004B X-Stat-Signature: tmnec5o1wnb5bytkzqnwgpb5erd11cnq X-HE-Tag: 1651099580-188832 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Add a regression test that validates that mremap fails for vma's that don't exist. Signed-off-by: Niels Dossche --- tools/testing/selftests/vm/hugepage-mremap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/vm/hugepage-mremap.c b/tools/testing/selftests/vm/hugepage-mremap.c index 1d689084a54b..585978f181ed 100644 --- a/tools/testing/selftests/vm/hugepage-mremap.c +++ b/tools/testing/selftests/vm/hugepage-mremap.c @@ -178,6 +178,12 @@ int main(int argc, char *argv[]) munmap(addr, length); + addr = mremap(addr, length, length, 0); + if (addr != MAP_FAILED) { + printf("mremap: Expected failure, but call succeeded\n"); + exit(1); + } + close(fd); unlink(argv[argc-1]); -- 2.35.2