I'd like to perform a kernel bisect to figure out which commit caused this regression. We need to identify the earliest kernel that did not exhibit the bug and the first kernel that did exhibit the bug.
Can you test the following kernels and post back? v4.4 final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-wily/ If v4.4 final exhibits the bug, we should move on to testing some of the v4.4 release candidates. v4.4-rc4: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc4-wily/ If v4.4-rc4 does not exhibit the bug then test v4.4-rc6: v4.4-rc6: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc6-wily/ If v4.4-rc4 does exhibit the bug then test v4.4-rc2: v4.4-rc2: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-rc2-wily/ Thanks in advance! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1540731 Title: SocketMessenger::update_session_creds() fails to get client PID Status in GLibC: New Status in Mir: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: Since updating to the 4.4.0-2 kernel recvmsg() fails SCM_CREDENTIALS request with EOPNOTSUPP. This manifests as a test failure in Mir: [ RUN ] PromptSessionClientAPI.client_pid_is_associated_with_session unknown file: Failure Test case: #include <gtest/gtest.h> #include <gmock/gmock.h> #include <sys/socket.h> #include <sys/stat.h> TEST(IsItBroken, recvmsg) { using namespace testing; enum { server, client, size }; int socket_fd[size]; int const opt = 1; ASSERT_THAT(socketpair(AF_LOCAL, SOCK_STREAM, 0, socket_fd), Eq(0)); auto const msg = "A random message"; send(socket_fd[client], msg, sizeof msg, MSG_DONTWAIT | MSG_NOSIGNAL); ASSERT_THAT(setsockopt(socket_fd[server], SOL_SOCKET, SO_PASSCRED, &opt, sizeof(opt)), Ne(-1)); union { struct cmsghdr cmh; char control[CMSG_SPACE(sizeof(ucred))]; } control_un; control_un.cmh.cmsg_len = CMSG_LEN(sizeof(ucred)); control_un.cmh.cmsg_level = SOL_SOCKET; control_un.cmh.cmsg_type = SCM_CREDENTIALS; msghdr msgh; msgh.msg_name = nullptr; msgh.msg_namelen = 0; msgh.msg_iov = nullptr; msgh.msg_iovlen = 0; msgh.msg_control = control_un.control; msgh.msg_controllen = sizeof(control_un.control); errno = 0; EXPECT_THAT(recvmsg(socket_fd[server], &msgh, MSG_PEEK), Ne(-1)) << "Error: " << strerror(errno); for (auto socket : socket_fd) close(socket); } To manage notifications about this bug go to: https://bugs.launchpad.net/glibc/+bug/1540731/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
