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Mon, 25 Aug 2025 07:58:19 -0700 (PDT) From: Yongting Lin To: anthony.yznaga@oracle.com, khalid@kernel.org, shuah@kernel.org, linyongting@bytedance.com Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org Subject: [PATCH 5/8] mshare: selftests: Add test case ioctl unmap Date: Mon, 25 Aug 2025 22:57:16 +0800 Message-Id: <20250825145719.29455-14-linyongting@bytedance.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250825145719.29455-1-linyongting@bytedance.com> References: <20250825145719.29455-1-linyongting@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B579E14000C X-Stat-Signature: hzw4ft5cmkgz1p9i5yajzw6k1n64gxyt X-Rspam-User: X-HE-Tag: 1756133900-999777 X-HE-Meta: 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 0RdUvXC1 KQEEU1mbPGJ2Bu6HJoUSetwCSPii+e265xY/cXWHugLfw9OqR3hOsLT3DoFTsv9PELMOkIUOBxa/xgi72MJQmQfOQcVcSR9KxmU/PsNcmv8xkGOBja+Wzgse0DP0r1lN+doBmMQiVxlcqX3Oin1tw+S5PN3QSik7tyhybKjhHoQLIX24JlSle8MKbXX8tCBmzgoTxsFghR53GRfbJmW5IwOCt3ojf2PJZeQ5HAh1nQV3FvkHTH1a17fhINa23wWNj3fcEcFQdIDUSNATfro176FvbSGLCBZVv0EQPCv6MTpdwDFXJ2S3dsOaC3g== 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: List-Subscribe: List-Unsubscribe: This test case aims to verify whether the process with guest mm will segfault when VMA of host mm is unmaped via ioctl(MSHAREFS_UNMAP). Signed-off-by: Yongting Lin --- tools/testing/selftests/mshare/basic.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/tools/testing/selftests/mshare/basic.c b/tools/testing/selftests/mshare/basic.c index 2347d30adfee..16d1f63c3ebe 100644 --- a/tools/testing/selftests/mshare/basic.c +++ b/tools/testing/selftests/mshare/basic.c @@ -85,4 +85,24 @@ TEST_F(basic, shared_mem) ASSERT_EQ(memcmp(addr, STRING, sizeof(STRING)), 0); } +TEST_F_SIGNAL(basic, ioctl_unmap, SIGSEGV) +{ + char *addr; + int fd; + + fd = open(self->filename, O_RDWR, 0600); + addr = mmap(NULL, self->allocate_size, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); + ASSERT_NE(addr, MAP_FAILED); + addr[0] = 'M'; + + /* munmap vma for host mm */ + mshare_ioctl_munmap(fd, self->allocate_size); + /* + * Will generate SIGSEGV signal as ioctl has already cleaned + * shared page table + */ + addr[0] = 'D'; +} + TEST_HARNESS_MAIN -- 2.20.1