Segfault when rTorrent runs on pretty busy drive

[dmak]

I think the issue is promoted due to increased load on the drive where rTorrent stores the downloads. I have caught about 5 SIGSEGV within 24 hours:

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `rtorrent'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fe1629f88ee in ?? () from /lib/x86_64-linux-gnu/libgcc_s.so.1
[Current thread is 1 (Thread 0x7fe1611ff6c0 (LWP 1818046))]
#0  0x00007fe1629f88ee in ?? () from /lib/x86_64-linux-gnu/libgcc_s.so.1
#1  0x00007fe1629f9eb4 in _Unwind_RaiseException () from /lib/x86_64-linux-gnu/libgcc_s.so.1
#2  0x00007fe1626a90cb in __cxa_throw () from /lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007fe162a5c92e in torrent::Chunk::from_buffer (this=0x400000624b7be5, 
    buffer=0x7fe162a83e84 <torrent::FileList::create_chunk_part(__gnu_cxx::__normal_iterator<torrent::File**, std::vector<torrent::File*, std::allocator<torrent::File*> > >, unsigned long, unsigned int, int)+84>, position=7122944, length=51) at /usr/include/c++/11/ext/new_allocator.h:89
#4  0x11abd9e74f10ad00 in ?? ()
#5  0x00007fe100000000 in ?? ()
#6  0x0000000000004000 in ?? ()
#7  0x00005627fbc28d20 in ?? ()
#8  0x0000000000000040 in ?? ()
#9  0x00005627f949bb00 in ?? ()
#10 0x00005627fbc28d20 in ?? ()
#11 0x00005627f949aa00 in ?? ()
#12 0x00007fe162add43b in torrent::PeerConnection<(torrent::Download::ConnectionType)0>::read_message (this=0x5627fab9fd00, 
    this@entry=0x5627fbc28d20) at ./src/protocol/peer_connection_leech.cc:290
#13 0x00007fe162ae002c in torrent::PeerConnection<(torrent::Download::ConnectionType)0>::event_read (this=0x5627fbc28d20)
    at ./src/protocol/peer_connection_leech.cc:400
#14 0x00007fe162a77d3a in torrent::PollEPoll::perform (this=0x5627f9495350) at ./src/torrent/poll_epoll.cc:185
#15 0x00007fe162aa5195 in torrent::thread_base::event_loop (thread=0x5627f949aa00) at ./src/torrent/utils/thread_base.cc:174
#16 0x00005627f784ba4e in main (argc=<optimized out>, argv=0x7fffe2673de8) at main.cc:490

and a few SIGABRT:

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `rtorrent'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f910b0a9e2c in ?? () from /lib/x86_64-linux-gnu/libc.so.6
[Current thread is 1 (Thread 0x7f9109dff6c0 (LWP 2007934))]
#0  0x00007f910b0a9e2c in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f910b05afb2 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f910b045472 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#3  0x0000560db38ddcc2 in handle_sigbus (signum=<optimized out>, sa=0x7f9109dfe3f0, ptr=<optimized out>) at main.cc:588
#4  <signal handler called>
#5  0x00007f910ac8e845 in ?? () from /lib/x86_64-linux-gnu/libcrypto.so.3
#6  0x00007f910ac90592 in SHA1_Update () from /lib/x86_64-linux-gnu/libcrypto.so.3
#7  0x00007f910b6838d2 in torrent::Sha1::update (length=<optimized out>, data=<optimized out>, this=0x560db7fc9e18) at ./../utils/sha1.h:96
#8  torrent::HashChunk::perform_part (length=1048576, itr=..., this=0x560db7fc9e00) at ./src/data/hash_chunk.cc:92
#9  torrent::HashChunk::perform (this=this@entry=0x560db7fc9e00, length=<optimized out>, length@entry=4294967295, force=force@entry=true)
    at ./src/data/hash_chunk.cc:59
#10 0x00007f910b682ccc in torrent::HashCheckQueue::perform (this=0x560db4256700) at ./src/data/hash_check_queue.cc:130
#11 0x00007f910b67e1db in torrent::thread_base::event_loop (thread=0x560db4256080) at ./src/torrent/utils/thread_base.cc:141
#12 0x00007f910b0a8134 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#13 0x00007f910b1287dc in ?? () from /lib/x86_64-linux-gnu/libc.so.6

and a few SIGBUS:

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `rtorrent'.
Program terminated with signal SIGBUS, Bus error.
#0  0x00007ff62855179d in ?? () from /lib/x86_64-linux-gnu/libc.so.6
[Current thread is 1 (Thread 0x7ff62738b980 (LWP 1799093))]
#0  0x00007ff62855179d in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ff6288c8aa2 in memcpy (__len=51, __src=0x5646909f637d, __dest=<optimized out>)
    at /usr/include/x86_64-linux-gnu/bits/string_fortified.h:29
#2  torrent::Chunk::from_buffer (this=0x56469057a000, buffer=0x5646909f637d, position=<optimized out>, length=length@entry=51)
    at ./src/data/chunk.cc:258
#3  0x00007ff6288fba22 in torrent::PeerConnectionBase::down_chunk_process (this=this@entry=0x564690d867b0, buffer=<optimized out>, 
    length=<optimized out>) at ./src/protocol/peer_connection_base.cc:632
#4  0x00007ff6288fba7e in torrent::PeerConnectionBase::down_chunk_from_buffer (this=0x564690d867b0)
    at ./src/protocol/peer_connection_base.cc:574
#5  0x00007ff6288ff603 in torrent::PeerConnection<(torrent::Download::ConnectionType)0>::read_message (this=this@entry=0x564690d867b0)
    at ./src/protocol/peer_connection_leech.cc:306
#6  0x00007ff62890202c in torrent::PeerConnection<(torrent::Download::ConnectionType)0>::event_read (this=0x564690d867b0)
    at ./src/protocol/peer_connection_leech.cc:400
#7  0x00007ff628899d3a in torrent::PollEPoll::perform (this=0x56468e7c3350) at ./src/torrent/poll_epoll.cc:185
#8  0x00007ff6288c7195 in torrent::thread_base::event_loop (thread=0x56468e7c8a00) at ./src/torrent/utils/thread_base.cc:174
#9  0x000056468cdd1a4e in main (argc=<optimized out>, argv=0x7ffc9a9f7b58) at main.cc:490

Whole list:

# coredumpctl --no-pager list
TIME                             PID UID   GID SIG     COREFILE EXE                 SIZE
Mon 2024-05-27 00:02:02 CEST 1790008 901 65534 SIGABRT present  /usr/bin/rtorrent  11.6M
Mon 2024-05-27 02:27:29 CEST 1799093 901 65534 SIGBUS  present  /usr/bin/rtorrent  22.0M
Mon 2024-05-27 05:22:30 CEST 1818044 901 65534 SIGSEGV present  /usr/bin/rtorrent  37.8M
Mon 2024-05-27 07:17:33 CEST 1836832 901 65534 SIGABRT present  /usr/bin/rtorrent  13.0M
Mon 2024-05-27 08:04:14 CEST 1849103 901 65534 SIGBUS  present  /usr/bin/rtorrent  11.5M
Mon 2024-05-27 08:57:31 CEST 1853949 901 65534 SIGBUS  present  /usr/bin/rtorrent  30.4M
Mon 2024-05-27 09:53:14 CEST 1859729 901 65534 SIGBUS  present  /usr/bin/rtorrent  56.9M
Mon 2024-05-27 10:51:00 CEST 1868376 901 65534 SIGABRT present  /usr/bin/rtorrent  20.4M
Mon 2024-05-27 11:35:32 CEST 1872128 901 65534 SIGSEGV present  /usr/bin/rtorrent  16.8M
Mon 2024-05-27 12:21:27 CEST 1877035 901 65534 SIGABRT present  /usr/bin/rtorrent  13.0M
Mon 2024-05-27 12:37:18 CEST 1882167 901 65534 SIGSEGV present  /usr/bin/rtorrent  12.4M
Mon 2024-05-27 13:02:19 CEST 1884195 901 65534 SIGABRT present  /usr/bin/rtorrent  12.2M
Mon 2024-05-27 14:02:43 CEST 1886962 901 65534 SIGABRT present  /usr/bin/rtorrent  14.9M
Mon 2024-05-27 14:41:12 CEST 1893585 901 65534 SIGSEGV present  /usr/bin/rtorrent  15.6M
Mon 2024-05-27 16:43:42 CEST 1897963 901 65534 SIGBUS  present  /usr/bin/rtorrent  26.0M
Mon 2024-05-27 18:00:11 CEST 1911632 901 65534 SIGABRT present  /usr/bin/rtorrent  19.5M
Mon 2024-05-27 20:43:32 CEST 1919986 901 65534 SIGBUS  present  /usr/bin/rtorrent  21.8M
Mon 2024-05-27 22:50:56 CEST 1957432 901 65534 SIGBUS  present  /usr/bin/rtorrent  22.0M

rTorrent v0.9.8-1