Assertion on bad socket url

[agladysh]

This is likely to be a ZMQ problem, but it still sucks to get a crash on bad user input, so maybe you can report it upstream?

$ lua -l zmq -e 'print("V:", unpack(zmq.version())) ctx=zmq.init(2) c=assert(ctx:socket(zmq.SUB)) print("E:", c:bind("pgm://127.0.0.1:5555"))'
V:  2   1   4
E:  true    nil
Warn: Interface lo reports as a loopback device.
Warn: Interface lo reports as a non-multicast capable device.
Error: PGM protocol requires CAP_NET_RAW capability, e.g. sudo execcap 'cap_net_raw=ep'
Warn: Close on IP Router Alert (RFC 2113) send socket failed: Bad file descriptor
Assertion failed: rc == 0 (connect_session.cpp:96)
Aborted

Actually I think that I was able to get this error in some other cases, without pgm:// — where user input may be sanitized. I will get back to you if I will be able to find that case.

[agladysh]

Note that the crash happens in the term().

Here is another one:

$ lua -l zmq -e 'print("V:", unpack(zmq.version())) ctx=zmq.init(2) c=assert(ctx:socket(zmq.SUB)) print("E:", c:bind("epgm://eth0;172.16.150.255:5555")) print("closing") c:close() print("term") ctx:term() print("done")'
V:  2   1   4
E:  true    nil
closing
term
Assertion failed: rc == 0 (connect_session.cpp:96)
Aborted

[agladysh]

But also on recv():

$ luajit2 -l zmq -e 'print("V:", unpack(zmq.version())) ctx=zmq.init(2) c=assert(ctx:socket(zmq.SUB)) print("E:", c:bind("epgm://eth0;172.16.150.255:5555")) print("recv") c:recv() print("closing") c:close() print("term") ctx:term() print("done")'
V:  2   1   4
E:  true    nil
recv
Assertion failed: rc == 0 (connect_session.cpp:96)
Aborted

[agladysh]

(Note that I know that the socket URLs are incorrect. My point is that lua-zmq should not crash with assertion, but should report error.)

[Neopallium]

This is an issue with ZeroMQ. Please report it to the ZeroMQ project.

[agladysh]

OK, done: https://github.com/zeromq/libzmq/issues/203