Synchronet now requires the libarchive development package (e.g. libarchive-dev on Debian-based Linux distros, libarchive.org for more info) to build successfully.

  • rswindell's avatar
    Implement a simple bound-checker in RingBufWrite(): · e3892691
    rswindell authored
    if the ringbuf is shared among multiple threads (e.g. the sbbs->outbuf is
    shared between output_thread() and passthru_thread()) - it was possible
    for a race condition to occur between the caller would call RingBufFree
    to determine the available space in the ringbuf and the call to RingBufWrite
    which would happily overflow the allocated buffer if more data was
    written to the ringbuf (by another thread) in the unprotected time between the
    RingBufFree and RingBufWrite calls.
    
    Now, RingBufWrite() can perform short-writes and will return a length less
    than what was requested to write when there is not enough available space
    to write the requested length.
    
    Hopefully this resolves the corruption/crash issue Deuce is seeing in
    sbbs's passthru_thread().
    e3892691
ringbuf.c 7.63 KB