Ruby

socket: use frozen string buffer when releasing GVL Using a non-frozen string buffer when GVL is released is dangerous because another thread may modify that buffer. This may lead to the contents of an invalid pointer being written to the socket. Follow the lead used with core io.c methods and duplicate the string to a temporary frozen buffer before writing. * ext/socket/ancdata.c (bsock_sendmsg_internal): use rb_str_tmp_frozen_{acquire/release} as with IO#write * internal.h (rb_str_tmp_frozen_acquire): export (rb_str_tmp_frozen_release): export 

related to [Bug #14195]