Hello, we have a server with some config running an old version (1.4.25-1) of haproxy under Debian wheezy. The reason we've not updated it is that any new versions we had access to would crash.
Today I was able to pinpoint where the problem lies: # haproxy -c -f /etc/haproxy/haproxy2.cfg Segmentation fault # haproxy -v HA-Proxy version 1.5.8 2014/10/31 Copyright 2000-2014 Willy Tarreau <[email protected]> # cat /etc/haproxy/haproxy2.cfg frontend public0 disabled #->varnish bind 192.168.1.1:80 option httplog option forwardfor option httpclose default_backend farm0 That config file is derived from the original config file (which worked with older haproxy versions (<=1.4.25)) by removing stuff from it and by replacing the IP address. Here's the stack trace: # gdb --args haproxy -c -f /etc/haproxy/haproxy2.cfg GNU gdb (GDB) 7.4.1-debian Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /tmp/foobar/testing/haproxy...Reading symbols from /usr/lib/debug/.build-id/32/cd7a1f9e2b30828b4186f93499ffe651d7ee20.debug...done. done. (gdb) run Starting program: /usr/sbin/haproxy -c -f /etc/haproxy/haproxy2.cfg Program received signal SIGSEGV, Segmentation fault. 0x00000000004238b8 in propagate_processes (from=from@entry=0x6d68d0, to=0x0) at src/cfgparse.c:6021 6021 src/cfgparse.c: No such file or directory. (gdb) backtrace #0 propagate_processes (from=from@entry=0x6e37e0, to=0x0) at src/cfgparse.c:5989 #1 0x00000000004238bd in propagate_processes (from=from@entry=0x6e37e0, to=<optimized out>) at src/cfgparse.c:6021 #2 0x00000000004238bd in propagate_processes (from=from@entry=0x6e37e0, to=<optimized out>) at src/cfgparse.c:6021 [...etc...] #262034 0x00000000004238bd in propagate_processes (from=from@entry=0x6e37e0, to=<optimized out>) at src/cfgparse.c:6021 #262035 0x00000000004238bd in propagate_processes (from=0x6e37e0, from@entry=0x6da0d0, to=<optimized out>) at src/cfgparse.c:6021 #262036 0x000000000042388a in propagate_processes (from=from@entry=0x6da0d0, to=to@entry=0x0) at src/cfgparse.c:6014 #262037 0x000000000042504d in check_config_validity () at src/cfgparse.c:7122 #262038 0x0000000000408e9c in init (argc=<optimized out>, argv=<optimized out>, argv@entry=0x7fffffffe628) at src/haproxy.c:713 #262039 0x000000000040746c in main (argc=<optimized out>, argv=0x7fffffffe628) at src/haproxy.c:1355
