The netlink code in GNetworkMonitorNetlink ignores all netlink replies that are not from uid 0. It has done so since initial merging (bug #620932), and there is even a comment in that bug from lennart that describes how to use netlink:
e) for (;;) { recvmsg(fd, data...); if (SCM_CREDENTIALS.uid != 0) continue; process(data...); } This is breaking for me in user namespaces where uid 0 is not mapped (it gets mapped to overflowuid), but just the user id. In this case we don't even return an error. I.e this code: sender = g_credentials_get_unix_user (creds, NULL); if (sender != 0) goto done; Does not set retval to FALSE, which means we ignore all replies and then wait forever as we never looked at the the final NLMSG_DONE message. Is there really a risk of another user sending a message over netlink here? -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Alexander Larsson Red Hat, Inc al...@redhat.com alexander.lars...@gmail.com He's a scarfaced guerilla astronaut moving from town to town, helping folk in trouble. She's a virginal hip-hop angel from the wrong side of the tracks. They fight crime! _______________________________________________ gtk-devel-list mailing list gtk-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-devel-list