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[Bryce Harrington <1690836@xxxxxxxxxxxxxxxxxx>]

Xenial and trusty have reached end of standard support

** Changed in: libnl3 (Ubuntu Trusty)
       Status: Confirmed => Won't Fix

** Changed in: libnl3 (Ubuntu Xenial)
       Status: Confirmed => Won't Fix

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https://bugs.launchpad.net/bugs/1690836

Title:
  libnl-genl-3.0 memory leak

Status in libnl3 package in Ubuntu:
  Fix Released
Status in libnl3 source package in Trusty:
  Won't Fix
Status in libnl3 source package in Xenial:
  Won't Fix

Bug description:
  It seems that there is a memory leak in the libnl-genl-3.0 library.
  The memory-leak can be seen when the function genl_ctrl_resolve() fails.

  It seems that this function copy a buffer and forget to deallocate it properly:
    258         cb = nl_cb_clone(orig); // buffer copied not freed

  -----------------------------------------------------------------------------
  The following attached source-code can help you to reproduce this behavior on Ubuntu 14.04.
  It forces an issue on the genl_ctrl_resolve by asking an unknown netlink-family.

  To compile program:
  g++ -std=c++11 main.cpp $(pkg-config --cflags --libs libnl-3.0 libnl-genl-3.0) -o main

  To detect memory-leak using Valgrind:
  valgrind --leak-check=full ./main

  -----------------------------------------------------------------------------
  Executing it on Debian 8.0 shows "no memory leak":
  sylvain@debian:~/test$ lsb_release -rd
  Description:	Debian GNU/Linux 8.8 (jessie)
  Release:	8.8

  sylvain@debian:~/test$ g++ -std=c++11 main.cpp $(pkg-config --cflags --libs libnl-3.0 libnl-genl-3.0) -o main
  sylvain@debian:~/test$ valgrind --leak-check=full ./main
  ==26390== Memcheck, a memory error detector
  ==26390== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
  ==26390== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
  ==26390== Command: ./main
  ==26390==
  start test
  error: can't retrieve the netlink-family id
  end test
  ==26390==
  ==26390== HEAP SUMMARY:
  ==26390==     in use at exit: 0 bytes in 0 blocks
  ==26390==   total heap usage: 13 allocs, 13 frees, 22,142 bytes allocated
  ==26390==
  ==26390== All heap blocks were freed -- no leaks are possible
  ==26390==
  ==26390== For counts of detected and suppressed errors, rerun with: -v
  ==26390== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

  -----------------------------------------------------------------------------
  Executing it on Ubuntu 14.04 shows a memory leak:
  ubuntu@ubuntu:~$ lsb_release -rd
  Description:	Ubuntu 14.04.5 LTS
  Release:	14.04

  ubuntu@ubuntu:~$ g++ -std=c++11 main.cpp $(pkg-config --cflags --libs libnl-3.0 libnl-genl-3.0) -o main
  ubuntu@ubuntu:~$ valgrind --leak-check=full ./main
  ==37377== Memcheck, a memory error detector
  ==37377== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
  ==37377== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
  ==37377== Command: ./main
  ==37377==
  start test
  error: can't retrieve the netlink-family id
  end test
  ==37377==
  ==37377== HEAP SUMMARY:
  ==37377==     in use at exit: 224 bytes in 1 blocks
  ==37377==   total heap usage: 13 allocs, 12 frees, 22,142 bytes allocated
  ==37377==
  ==37377== 224 bytes in 1 blocks are definitely lost in loss record 1 of 1
  ==37377==    at 0x4C2CC70: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
  ==37377==    by 0x5048FAA: nl_cb_alloc (in /lib/x86_64-linux-gnu/libnl-3.so.200.16.1)
  ==37377==    by 0x504CB1E: nl_socket_alloc (in /lib/x86_64-linux-gnu/libnl-3.so.200.16.1)
  ==37377==    by 0x4012E3: A::Init() (in /home/ubuntu/main)
  ==37377==    by 0x401189: main (in /home/ubuntu/main)
  ==37377==
  ==37377== LEAK SUMMARY:
  ==37377==    definitely lost: 224 bytes in 1 blocks
  ==37377==    indirectly lost: 0 bytes in 0 blocks
  ==37377==      possibly lost: 0 bytes in 0 blocks
  ==37377==    still reachable: 0 bytes in 0 blocks
  ==37377==         suppressed: 0 bytes in 0 blocks
  ==37377==
  ==37377== For counts of detected and suppressed errors, rerun with: -v
  ==37377== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

  Thanks,
  Sylvain Trinquet

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