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https://issues.apache.org/jira/browse/PROTON-1173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15235328#comment-15235328
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ASF subversion and git services commented on PROTON-1173:
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Commit 9d88f823c1951012888440501fdbe111f344518d in qpid-proton's branch
refs/heads/master from [~chug]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-proton.git;h=9d88f82 ]
PROTON-1173: Close channel with error on channel-max violation
> Proton C core dump in face of channel-max protocol violation
> ------------------------------------------------------------
>
> Key: PROTON-1173
> URL: https://issues.apache.org/jira/browse/PROTON-1173
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: 0.11.1
> Reporter: Chuck Rolke
>
> A rogue client creates a session on a channel higher than the channel-max
> exchanged at connection open.
> {noformat}
> Mon Apr 11 10:34:27 2016 SERVER (trace) [1]:pn_session: too many sessions: 1
> channel_max is 0 (/home/chug/git/qpid-dispatch/src/server.c:116)
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff793b84a in pn_do_begin (transport=0x6a4bd0, frame_type=0 '\000',
> channel=1, args=0x7c1f60, payload=0x7fffffffd2c0)
> at /home/chug/git/qpid-proton/proton-c/src/transport/transport.c:1205
> 1205 ssn->state.incoming_transfer_count = next;
> Missing separate debuginfos, use: debuginfo-install
> nss-mdns-0.10-15.fc21.x86_64
> (gdb)
> (gdb) list
> 1200 // XXX: what if session is NULL?
> 1201 ssn = (pn_session_t *) pn_hash_get(transport->local_channels,
> remote_channel);
> 1202 } else {
> 1203 ssn = pn_session(transport->connection);
> 1204 }
> 1205 ssn->state.incoming_transfer_count = next;
> 1206 pni_map_remote_channel(ssn, channel);
> 1207 PN_SET_REMOTE(ssn->endpoint.state, PN_REMOTE_ACTIVE);
> 1208 pn_collector_put(transport->connection->collector, PN_OBJECT, ssn,
> PN_SESSION_REMOTE_OPEN);
> 1209 return 0;
> (gdb) p ssn
> $1 = (pn_session_t *) 0x0
> (gdb)
> {noformat}
> Session is null and SEGV is what happens.
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