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([240d:1a:c0d:9f00:ca7f:54ff:fe01:979d]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fac156903bsm85565195ad.208.2024.07.02.09.06.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jul 2024 09:06:09 -0700 (PDT) From: Shigeru Yoshida To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: kuniyu@amazon.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Shigeru Yoshida Subject: [PATCH net 2/2] selftest: af_unix: Add test case for backtrack after finalising SCC. Date: Wed, 3 Jul 2024 01:04:28 +0900 Message-ID: <20240702160428.10153-2-syoshida@redhat.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240702160428.10153-1-syoshida@redhat.com> References: <20240702160428.10153-1-syoshida@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Kuniyuki Iwashima syzkaller reported a KMSAN splat in __unix_walk_scc() while backtracking edge_stack after finalising SCC. Let's add a test case exercising the path. Signed-off-by: Kuniyuki Iwashima Signed-off-by: Shigeru Yoshida diff --git a/tools/testing/selftests/net/af_unix/scm_rights.c b/tools/testing/selftests/net/af_unix/scm_rights.c index 2bfed46e0b19..d66336256580 100644 --- a/tools/testing/selftests/net/af_unix/scm_rights.c +++ b/tools/testing/selftests/net/af_unix/scm_rights.c @@ -14,12 +14,12 @@ FIXTURE(scm_rights) { - int fd[16]; + int fd[32]; }; FIXTURE_VARIANT(scm_rights) { - char name[16]; + char name[32]; int type; int flags; bool test_listener; @@ -172,6 +172,8 @@ static void __create_sockets(struct __test_metadata *_metadata, const FIXTURE_VARIANT(scm_rights) *variant, int n) { + ASSERT_LE(n * 2, sizeof(self->fd) / sizeof(self->fd[0])); + if (variant->test_listener) create_listeners(_metadata, self, n); else @@ -283,4 +285,23 @@ TEST_F(scm_rights, cross_edge) close_sockets(8); } +TEST_F(scm_rights, backtrack_from_scc) +{ + create_sockets(10); + + send_fd(0, 1); + send_fd(0, 4); + send_fd(1, 2); + send_fd(2, 3); + send_fd(3, 1); + + send_fd(5, 6); + send_fd(5, 9); + send_fd(6, 7); + send_fd(7, 8); + send_fd(8, 6); + + close_sockets(10); +} + TEST_HARNESS_MAIN