I found the bug: in the package iproute2 version 2-4.3, in the file
ip/ipnetns.c, line 175 must read:
c = malloc(sizeof(*c) + strlen(name) + 1);
instead of:
c = malloc(sizeof(*c) + strlen(name));
** Changed in: iproute2 (Ubuntu)
Status: Expired => In Progress
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https://bugs.launchpad.net/bugs/1615209
Title:
ip crashes after a few times adding and removing network namespaces
Status in iproute2 package in Ubuntu:
In Progress
Bug description:
# which ip
/sbin/ip
# valgrind ip netns add black2
==22804== Memcheck, a memory error detector
==22804== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==22804== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==22804== Command: ip netns add black2
==22804==
==22804== Invalid write of size 1
==22804== at 0x4031F43: memcpy (in
/usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==22804== by 0x8059C83: ??? (in /bin/ip)
==22804== by 0x805AF9A: netns_map_init (in /bin/ip)
==22804== by 0x805B01F: do_netns (in /bin/ip)
==22804== by 0x804DF67: ??? (in /bin/ip)
==22804== by 0x804DA11: main (in /bin/ip)
==22804== Address 0x4227094 is 0 bytes after a block of size 28 alloc'd
==22804== at 0x402D17C: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==22804== by 0x8059C5E: ??? (in /bin/ip)
==22804== by 0x805AF9A: netns_map_init (in /bin/ip)
==22804== by 0x805B01F: do_netns (in /bin/ip)
==22804== by 0x804DF67: ??? (in /bin/ip)
==22804== by 0x804DA11: main (in /bin/ip)
==22804==
Cannot create namespace file "/var/run/netns/black2": File exists
==22804==
==22804== HEAP SUMMARY:
==22804== in use at exit: 28 bytes in 1 blocks
==22804== total heap usage: 2 allocs, 1 frees, 32,824 bytes allocated
==22804==
==22804== LEAK SUMMARY:
==22804== definitely lost: 0 bytes in 0 blocks
==22804== indirectly lost: 0 bytes in 0 blocks
==22804== possibly lost: 0 bytes in 0 blocks
==22804== still reachable: 28 bytes in 1 blocks
==22804== suppressed: 0 bytes in 0 blocks
==22804== Rerun with --leak-check=full to see details of leaked memory
==22804==
==22804== For counts of detected and suppressed errors, rerun with: -v
==22804== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
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