Running this test on jammy 5.15, it passes if the vrf module is missing, the ping will come back with the expected response of Packet too big. With the vrf module loaded, we won't get the message back. Looking at the strace of the command working vs failing, this is a difference spotted:
vrf loaded: recvmsg(3, {msg_namelen=128}, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(3, {msg_namelen=128}, 0) = -1 EINTR (Interrupted system call) --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} --- vrf missing: recvmsg(3, {msg_namelen=128}, 0) = -1 EMSGSIZE (Message too long) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928890 Title: vrf_route_leaking.sh in net from ubuntu_kernel_selftests linux ADT test failure with linux/5.11.0-18.19 (Ping received ICMP Packet too big) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1928890/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs