Closed
Description
We have recently upgraded from an old libevent 2.0.x to new 2.1.x libevent.
We're using ssl bufferevent with an additional underlying ssl bufferevent (ssl -> ssl tunnel).
The underlying bufferevent is released manually by our code. In other words, the flag "BEV_OPT_CLOSE_ON_FREE" is unused, instead something of this sort is executed in our code:
while (m_bev)
{
SSL *ssl;
if ((ssl = bufferevent_openssl_get_ssl(m_bev)) != NULL)
{
// SSL_shutdown...
}
struct bufferevent *m_underlyingBev = bufferevent_get_underlying(m_bev);
bufferevent_free(m_bev);
m_bev = m_underlyingBev;
if (m_bev != NULL)
{
// disable buffer event.
}
}
I suspect commit 8939676 is the root cause of the issue we're observing.
Regardless, I now wonder if the underlying bufferevent must become NULL after bufferevent_free is called (especially if "BEV_OPT_CLOSE_ON_FREE" is not used).
Observing the unlink code "bev_ssl->underlying = NULL" is commented out (why?).
Maybe it's still required in the "else" section?
In addition, why was "bufferevent_unsuspend_read_" added to the else? (This is probably what's causing our issue).
static void
be_openssl_unlink(struct bufferevent *bev)
{
struct bufferevent_openssl *bev_ssl = upcast(bev);
if (bev_ssl->bev.options & BEV_OPT_CLOSE_ON_FREE) {
if (bev_ssl->underlying) {
if (BEV_UPCAST(bev_ssl->underlying)->refcnt < 2) {
event_warnx("BEV_OPT_CLOSE_ON_FREE set on an "
"bufferevent with too few references");
} else {
bufferevent_free(bev_ssl->underlying);
/* We still have a reference to it, via our
* BIO. So we don't drop this. */
// bev_ssl->underlying = NULL;
}
}
} else {
if (bev_ssl->underlying) {
if (bev_ssl->underlying->errorcb == be_openssl_eventcb)
bufferevent_setcb(bev_ssl->underlying,
NULL,NULL,NULL,NULL);
bufferevent_unsuspend_read_(bev_ssl->underlying,
BEV_SUSPEND_FILT_READ);
}
}
}
I'm not very familiar with the libevent code. Therefore, I may be completely off. Any feedback/ideas would be appreciated.
The following is an example of an observed stack trace:
_#0 0x00007fc06f7601df in bufferevent_suspend_read_ () from /usr/lib64/libevent-2.1.so.6
#1 0x00007fc06f9b0c20 in stop_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#2 0x00007fc06f9b0f1c in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#3 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#4 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#5 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#6 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#7 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#8 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#9 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#10 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#11 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#12 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#13 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#14 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#15 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#16 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#17 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#18 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#19 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#20 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#21 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#22 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#23 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#24 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#25 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#26 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#27 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#28 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#29 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#30 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#31 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#32 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#33 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#34 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#35 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#36 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#37 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#38 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#39 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#40 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#41 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#42 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#43 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#44 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#45 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#46 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#47 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#48 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#49 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#50 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#51 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#52 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#53 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#54 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#55 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#56 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#57 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#58 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#59 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#60 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#61 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#62 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#63 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#64 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#65 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#66 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#67 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#68 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#69 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#70 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#71 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#72 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#73 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#74 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#75 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#76 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#77 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#78 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#79 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#80 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#81 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#82 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#83 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#84 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#85 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#86 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#87 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#88 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#89 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#90 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#91 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#92 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#93 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#94 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#95 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#96 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#97 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#98 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#99 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#100 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#101 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#102 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#103 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#104 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#105 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#106 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#107 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#108 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#109 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#110 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#111 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#112 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#113 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#114 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#115 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#116 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#117 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#118 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#119 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#120 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#121 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#122 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#123 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#124 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#125 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#126 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#127 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#128 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#129 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#130 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#131 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#132 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#133 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#134 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#135 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#136 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#137 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#138 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#139 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#140 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#141 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#142 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#143 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#144 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#145 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#146 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#147 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#148 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#149 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#150 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#151 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#152 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#153 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#154 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#155 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#156 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#157 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#158 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#159 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#160 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#161 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#162 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#163 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#164 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#165 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#166 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#167 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#168 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#169 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#170 0x00007fc06f9b24fa in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#171 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#172 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#173 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#174 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#175 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#176 0x00007fc06f9b241e in be_openssl_enable () from
6574
/usr/lib64/libevent_openssl-2.1.so.6
#177 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#178 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#179 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#180 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#181 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#182 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#183 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#184 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#185 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#186 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#187 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#188 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#189 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#190 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#191 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#192 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#193 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#194 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#195 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#196 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#197 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#198 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#199 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#200 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#201 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#202 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#203 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#204 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#205 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#206 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#207 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#208 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#209 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#210 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#211 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#212 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#213 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#214 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#215 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#216 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#217 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#218 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#219 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#220 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#221 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#222 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#223 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#224 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#225 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#226 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#227 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#228 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#229 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#230 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#231 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#232 0x00007fc06f9b0ab2 in start_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#233 0x00007fc06f9b241e in be_openssl_enable () from /usr/lib64/libevent_openssl-2.1.so.6
#234 0x00007fc06f76033a in bufferevent_unsuspend_read_ () from /usr/lib64/libevent-2.1.so.6
#235 0x00007fc06f9b0c85 in stop_writing () from /usr/lib64/libevent_openssl-2.1.so.6
#236 0x00007fc06f9b0f28 in conn_closed () from /usr/lib64/libevent_openssl-2.1.so.6
#237 0x00007fc06f9b12bd in do_read () from /usr/lib64/libevent_openssl-2.1.so.6
#238 0x00007fc06f9b1874 in consider_reading () from /usr/lib64/libevent_openssl-2.1.so.6
#239 0x00007fc06f9b1b93 in be_openssl_readcb () from /usr/lib64/libevent_openssl-2.1.so.6
#240 0x00007fc06f7606a7 in bufferevent_run_deferred_callbacks_locked () from /usr/lib64/libevent-2.1.so.6
#241 0x00007fc06f76cc4f in event_process_active_single_queue () from /usr/lib64/libevent-2.1.so.6
#242 0x00007fc06f76d1c0 in event_process_active () from /usr/lib64/libevent-2.1.so.6
#243 0x00007fc06f76d924 in event_base_loop () from /usr/lib64/libevent-2.1.so.6
#244 0x00007fc06f76d250 in event_base_dispatch () from /usr/lib64/libevent-2.1.so.6_