[DISPATCH-2088] SEGV in qd_buffer_dec_fanout

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 1.16.0
• Component/s: Protocol Adaptors
• Assignee: Charles E. Rolke
• Reporter: michael goulish
• Created: 27/Apr/21 13:28
• Updated: 14/May/21 14:09
• Resolved: 29/Apr/21 19:23

Description

code from 2021-04-26-afternoon

{   dispatch: (main) 22689e4f95ae1945e61eec814d3ab3e2d4259f04   proton: (main) 08b301a97c834e002d41ee852bba1288fe83b936 }

 

Test

• Doing 1-router TCP throughput testing across high-bandwidth link.
• Router has 32 worker threads.
• iperf client is using "-P 10" flag, i.e. doing 10 parallel streams.  
• Router is sustaining 10+ Gbit/sec during test.
• SEGV happens at end of test.

 

Here's the backtrace:

 

#0 sys_atomic_sub (value=1, ref=0x14)
at /home/mick/latest/qpid-dispatch/include/qpid/dispatch/atomic.h:48
#1 sys_atomic_dec (ref=0x14)
at /home/mick/latest/qpid-dispatch/include/qpid/dispatch/atomic.h:212
#2 qd_buffer_dec_fanout (buf=0x0)
at /home/mick/latest/qpid-dispatch/include/qpid/dispatch/buffer.h:177
#3 qd_message_stream_data_release (stream_data=0x7f01b80038c8)
at /home/mick/latest/qpid-dispatch/src/message.c:2627
#4 0x00007f0237035895 in flush_outgoing_buffs (conn=conn@entry=0x7f0218012a88)
at /home/mick/latest/qpid-dispatch/src/adaptors/tcp_adaptor.c:431
#5 0x00007f023703905e in free_qdr_tcp_connection (tc=0x7f0218012a88)
at /home/mick/latest/qpid-dispatch/src/adaptors/tcp_adaptor.c:455
#6 0x00007f023707491d in router_core_thread (arg=0x1e6ccb0)
at /home/mick/latest/qpid-dispatch/src/router_core/router_core_thread.c:239
#7 0x00007f0236f663f9 in start_thread () from /lib64/libpthread.so.0
#8 0x00007f0236be5b53 in clone () from /lib64/libc.so.6