[GNUnet-developers] Deadlock due to `pthread_mutex_lock'.

[Ludovic Courtès]

Hello,

When running `gnunetd' (0.8.0b), I get the following error:

  # gnunetd -d --config gnunetd.conf -L DEBUG
  Aug 31 18:53:23 INFO: Loading transports `udp tcp http nat'
  Aug 31 18:53:23 INFO: Loaded transport `udp'
  Aug 31 18:53:23 INFO: Loaded transport `tcp'
  Aug 31 18:53:23 INFO: Loaded transport `http'
  Aug 31 18:53:23 INFO: Loaded transport `nat'
  Aug 31 18:53:23 FATAL: Deadlock due to `pthread_mutex_lock'.
  Aug 31 18:53:23 FATAL: Internal error: assertion failed at statuscalls.c:402.
  Aborted (core dumped)

Here's a back-trace of each of the 4 threads:

  (gdb) bt
  #0  0xffffe424 in __kernel_vsyscall ()
  #1  0xb7c1ec37 in raise () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libc.so.6
  #2  0xb7c20671 in abort () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libc.so.6
  #3  0xb7f41fa5 in GNUNET_mutex_lock_at_file_line_ () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #4  0xb7f3f919 in resetStatusCalls () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #5  0xb7f23a5a in GNUNET_GC_set_configuration_value_string () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #6  0xb7f241b2 in GNUNET_GC_set_configuration_value_number () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #7  0xb7f2435d in GNUNET_GC_get_configuration_value_number () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #8  0xb7f3fbd0 in resetStatusCalls () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #9  0xb7f23a5a in GNUNET_GC_set_configuration_value_string () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #10 0xb7f23dfc in GNUNET_GC_get_configuration_value_string () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #11 0xb7f3f8db in resetStatusCalls () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #12 0xb7f23a5a in GNUNET_GC_set_configuration_value_string () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #13 0xb7f241b2 in GNUNET_GC_set_configuration_value_number () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #14 0xb7f2435d in GNUNET_GC_get_configuration_value_number () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #15 0xb7f5099e in connectionConfigChangeCallback () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetcore.so.0
  #16 0xb7f50d28 in GNUNET_CORE_connection_init () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetcore.so.0
  #17 0x0804967f in gnunet_main ()
  #18 0x08049ae0 in main ()
  (gdb) info threads 
    4 process 3476  0xffffe424 in __kernel_vsyscall ()
    3 process 3477  0xffffe424 in __kernel_vsyscall ()
    2 process 3478  0xffffe424 in __kernel_vsyscall ()
  * 1 process 3475  0xffffe424 in __kernel_vsyscall ()
  (gdb) thread 2
  [Switching to thread 2 (process 3478)]#0  0xffffe424 in __kernel_vsyscall ()
  (gdb) bt
  #0  0xffffe424 in __kernel_vsyscall ()
  #1  0xb7d3ebb8 in recv () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libpthread.so.0
  #2  0xb71a650f in gaim_upnp_discover () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/GNUnet/libgnunetmodule_upnp.so
  #3  0xb71a4dd4 in discover_thread () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/GNUnet/libgnunetmodule_upnp.so
  #4  0xb7d3717b in start_thread () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libpthread.so.0
  #5  0xb7cbbcfe in clone () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libc.so.6
  (gdb) thread 3
  [Switching to thread 3 (process 3477)]#0  0xffffe424 in __kernel_vsyscall ()
  (gdb) bt
  #0  0xffffe424 in __kernel_vsyscall ()
  #1  0xb7d3f096 in nanosleep () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libpthread.so.0
  #2  0xb7f425a1 in GNUNET_thread_sleep () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #3  0xb7f27943 in cron_main_method () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #4  0xb7d3717b in start_thread () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libpthread.so.0
  #5  0xb7cbbcfe in clone () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libc.so.6
  (gdb) thread 4
  [Switching to thread 4 (process 3476)]#0  0xffffe424 in __kernel_vsyscall ()
  (gdb) bt
  #0  0xffffe424 in __kernel_vsyscall ()
  #1  0xb7cb4fd1 in select () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libc.so.6
  #2  0xb7f38cda in selectThread () from 
/nix/store/8gn0z686l3ajgb60zgngs2w1ip7nqvws-gnunet-0.8.0b/lib/libgnunetutil.so.3
  #3  0xb7d3717b in start_thread () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libpthread.so.0
  #4  0xb7cbbcfe in clone () from 
/nix/store/b2gmgy8y6nidjj7n34jx4sanrjdaxrw3-glibc-2.7/lib/libc.so.6

The `gnunetd.conf' file reads this:

  [PATHS]
  GNUNETD_HOME = /var/lib/gnunet

  [GNUNETD]
  APPLICATIONS = advertising getoption fs stats traffic
  TRANSPORTS = udp tcp http nat

And `/var/lib/gnunet' is empty.

Any idea what's wrong?

Thanks in advance,
Ludo'.