[zeromq-dev] segfault in zmq_connect

Mahadevan R mdevan.r at gmail.com
Wed Dec 8 11:14:07 CET 2010

Hi guys,

I'm getting a strange segfault with the following stack:

#0  0x00007f623e64edd0 in _int_malloc () from /lib/libc.so.6
#1  0x00007f623e650ad8 in malloc () from /lib/libc.so.6
#2  0x00007f623c375d4f in zmq::create_pipe (reader_parent_=0x13bdde0,
writer_parent_=0x13c0e10, hwm_=1000,
    swap_size_=0, reader_=0x7fff08b49ad8, writer_=0x7fff08b49ad0) at
#3  0x00007f623c37c347 in zmq::socket_base_t::connect (this=0x13bdde0,
    addr_=0x7f623c594621 "tcp://") at socket_base.cpp:406

This is on a 64-bit debian lenny, fairly easily reproducible. Zeromq version
is 2.1.0 beta. The crash occurs in a forked child, although parent's context
is not touched (not sure if this is relevant). There are many children, all
connecting to the same ZMQ_REQ. Context is inited with thread pool size of
1. There is a single ZMQ_REP process (thread pool size 1).

Any hints?

Thanks & Regards,
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