Buffer Overflow When Syncing Bitcoin SV Mainnet

[etscrivner]

WHAT HAPPENED
Buffer overflow caused the Bitcoin Unlimited process to terminate when attempting to sync mainnet Bitcoin SV fork.

libc terminated the process with the following error message: *** buffer overflow detected ***: /app/bitcoind terminated

This does not appear to happen deterministically as sometimes it does fully sync. So seems like a buffer overflow bug that is largely path dependent.

OS: Linuxkit 4.9.125 64-bit
Version: bucash 1.5.1.0

LOGS

  | January 22nd 2019, 20:25:43.978 | /app/bitcoind[0x68c30e]

  | January 22nd 2019, 20:25:43.978 | /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7ff2ad9c941d]

  | January 22nd 2019, 20:25:43.978 | /app/bitcoind[0x4ad98f]

  | January 22nd 2019, 20:25:43.978 | /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7ff2adc936ba]

  | January 22nd 2019, 20:25:43.978 | /app/bitcoind[0x4af19d]

  | January 22nd 2019, 20:25:43.978 | /usr/lib/x86_64-linux-gnu/libboost_thread.so.1.58.0(+0x115d5)[0x7ff2afa305d5]

  | January 22nd 2019, 20:25:43.978 | /app/bitcoind[0x4ba3d3]

  | January 22nd 2019, 20:25:43.978 | /app/bitcoind[0x4adeb7]

  | January 22nd 2019, 20:25:43.978 | /app/bitcoind[0x4ba49e]

  | January 22nd 2019, 20:25:43.977 | /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x5c)[0x7ff2ad9db15c]

  | January 22nd 2019, 20:25:43.977 | /lib/x86_64-linux-gnu/libc.so.6(+0x117160)[0x7ff2ad9d9160]

  | January 22nd 2019, 20:25:43.977 | ======= Backtrace: =========

  | January 22nd 2019, 20:25:43.977 | /app/bitcoind[0x688f08]

  | January 22nd 2019, 20:25:43.977 | 2019-01-23 04:25:43 Acceptable block: ver:20000002 time:1493403775 size: 998140 Tx:2608 Sig:5308

  | January 22nd 2019, 20:25:43.977 | /lib/x86_64-linux-gnu/libc.so.6(+0x1190a7)[0x7ff2ad9db0a7]

  | January 22nd 2019, 20:25:43.977 | /lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7ff2ad9397e5]

  | January 22nd 2019, 20:25:43.976 | *** buffer overflow detected ***: /app/bitcoind terminated

  | January 22nd 2019, 20:25:43.976 | 2019-01-23 04:25:43 UpdateTip: new best=000000000000000000ffa002684abf896651e7cadcfdd405878758ea23373e6b  height=462882 bits=402791539 log2_work=86.315554  tx=215156477  date=2017-04-21 16:37:01 progress=0.595330  cache=5033.1MiB(36084861txo)

  | January 22nd 2019, 20:25:43.976 | 2019-01-23 04:25:43 Acceptable block: ver:20000002 time:1493403074 size: 998106 Tx:2854 Sig:5379

  | January 22nd 2019, 20:25:43.679 | 2019-01-23 04:25:43 UpdateTip: new best=00000000000000000002cf3cc6a4d844fb941b345e0070919f5b90e86144a203  height=462879 bits=402791539 log2_work=86.315453  tx=215149142  date=2017-04-21 16:05:10 progress=0.595309  cache=5032.5MiB(36079970txo)

  | January 22nd 2019, 20:25:43.679 | 2019-01-23 04:25:43 UpdateTip: new best=000000000000000000e05ac7331c8714e63a8323ca7382a11aa8b60a5ce249c1  height=462881 bits=402791539 log2_work=86.315521  tx=215154199  date=2017-04-21 16:21:53 progress=0.595323  cache=5033.0MiB(36083412txo)

CONFIGURATION FILE

datadir=/data
bind=0.0.0.0
listen=1
port=8332
bantime=15
rpcport=8332
rpcallowip=0.0.0.0/0
rpcthreads=8
rpcworkqueue=32
consensus.forkNov2018Time=0
consensus.svForkNov2018Time=1
printtoconsole=1
disablewallet=1
txindex=1
rpcauth=...
zmqpubhashtx=tcp://0.0.0.0:28332
zmqpubhashblock=tcp://0.0.0.0:28332

[etscrivner]

Was able to observe a second buffer overflow crash adding data below:

  | January 23rd 2019, 14:02:05.801 | 7f080118f000-7f080c000000 r--s 00000000 ca:20 55320517                   /data/blocks/index/044765.ldb
  | January 23rd 2019, 14:02:05.801 | 7f07fc000000-7f07ff77a000 rw-p 00000000 00:00 0

  | January 23rd 2019, 14:02:05.800 | 7f07ec000000-7f07ef1e4000 rw-p 00000000 00:00 0

  | January 23rd 2019, 14:02:05.800 | 00bd2000-00d1f000 rw-p 00000000 00:00 0

  | January 23rd 2019, 14:02:05.800 | 00bd0000-00bd2000 rw-p 005d0000 ca:05 2634549                            /app/bitcoind

  | January 23rd 2019, 14:02:05.800 | 00400000-009cf000 r-xp 00000000 ca:05 2634549                            /app/bitcoind

  | January 23rd 2019, 14:02:05.800 | 7f07f4000000-7f07f7b1c000 rw-p 00000000 00:00 0

  | January 23rd 2019, 14:02:05.800 | 7f07ef1e4000-7f07f0000000 ---p 00000000 00:00 0

  | January 23rd 2019, 14:02:05.800 | 0122f000-050fc000 rw-p 00000000 00:00 0                                  [heap]

  | January 23rd 2019, 14:02:05.800 | 00bcf000-00bd0000 r--p 005cf000 ca:05 2634549                            /app/bitcoind

  | January 23rd 2019, 14:02:05.799 | /app/bitcoind[0x4adeb7]

  | January 23rd 2019, 14:02:05.799 | /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f0bbe1e441d]

  | January 23rd 2019, 14:02:05.799 | /app/bitcoind[0x4ad98f]

  | January 23rd 2019, 14:02:05.799 | /app/bitcoind[0x4ba49e]

  | January 23rd 2019, 14:02:05.799 | /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7f0bbe4ae6ba]

  | January 23rd 2019, 14:02:05.799 | /app/bitcoind[0x4ba3d3]

  | January 23rd 2019, 14:02:05.799 | /usr/lib/x86_64-linux-gnu/libboost_thread.so.1.58.0(+0x115d5)[0x7f0bc024b5d5]

  | January 23rd 2019, 14:02:05.799 | /app/bitcoind[0x68c30e]

  | January 23rd 2019, 14:02:05.799 | ======= Memory map: ========

  | January 23rd 2019, 14:02:05.799 | /app/bitcoind[0x4af19d]

  | January 23rd 2019, 14:02:05.798 | /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x5c)[0x7f0bbe1f615c]

  | January 23rd 2019, 14:02:05.798 | /app/bitcoind[0x688f08]

  | January 23rd 2019, 14:02:05.798 | /lib/x86_64-linux-gnu/libc.so.6(+0x117160)[0x7f0bbe1f4160]

  | January 23rd 2019, 14:02:05.798 | /lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7f0bbe1547e5]

  | January 23rd 2019, 14:02:05.798 | 2019-01-23 22:02:05 UpdateTip: new best=000000000000000000e38492349fa80f05c5577234940bc8c85fd74f3b63384a  height=546236 bits=402780741 log2_work=87.575295  tx=257066345  date=2018-09-03 07:59:18 progress=0.709277  cache=4365.0MiB(30745621txo)

  | January 23rd 2019, 14:02:05.798 | /lib/x86_64-linux-gnu/libc.so.6(+0x1190a7)[0x7f0bbe1f60a7]

  | January 23rd 2019, 14:02:05.798 | *** buffer overflow detected ***: /app/bitcoind terminated

  | January 23rd 2019, 14:02:05.798 | 2019-01-23 22:02:05 Acceptable block: ver:20000000 time:1536559523 size: 77134 Tx:75 Sig:458

  | January 23rd 2019, 14:02:05.798 | ======= Backtrace: =========

  | January 23rd 2019, 14:02:05.797 | 2019-01-23 22:02:05 Acceptable block: ver:20000000 time:1536152939 size: 1799869 Tx:8233 Sig:10047

  | January 23rd 2019, 14:02:05.797 | 2019-01-23 22:02:05 UpdateTip: new best=00000000000000000056d4b3f6d9024c6e0fa9b32a35fd8f65ad4d879d048c03  height=546235 bits=402780255 log2_work=87.57528  tx=257062425  date=2018-09-03 07:56:43 progress=0.709266  cache=4364.6MiB(30742434txo)

  | January 23rd 2019, 14:02:05.797 | 2019-01-23 22:02:05 Acceptable block: ver:20000000 time:1536558985 size: 17323 Tx:36 Sig:65