Segmentation Fault

[jgeboski]

Program received signal SIGSEGV, Segmentation fault.
0xb7cbe9b4 in gnutls_bye () from /usr/lib/libgnutls.so.28
(gdb) bt
#0  0xb7cbe9b4 in gnutls_bye () from /usr/lib/libgnutls.so.28
#1  0x8003a773 in ssl_disconnect (conn_=0x80278c50) at ssl_gnutls.c:454
#2  0xb76605af in fb_mqtt_close (mqtt=0x800c0830) at facebook-mqtt.c:239
#3  0xb766018c in fb_mqtt_dispose (obj=0x800c0830) at facebook-mqtt.c:63
#4  0xb7439c14 in g_object_unref (_object=0x800c0830) at /var/tmp/portage/dev-libs/glib-2.48.0/work/glib-2.48.0/gobject/gobject.c:3146
#5  0xb745292d in g_signal_emit_valist (instance=instance@entry=0x800c0830, signal_id=signal_id@entry=15, detail=detail@entry=0, var_args=<optimized out>, var_args@entry=0xbffff098 "\240\311\"\200\374\360\377\277\240\320\034\200f\252\375\267\211lf\267\060\b\f\200") at /var/tmp/portage/dev-libs/glib-2.48.0/work/glib-2.48.0/gobject/gsignal.c:3344
#6  0xb74533a9 in g_signal_emit_by_name (instance=0x800c0830, detailed_signal=0xb7666c1d "error") at /var/tmp/portage/dev-libs/glib-2.48.0/work/glib-2.48.0/gobject/gsignal.c:3481
#7  0xb76606e6 in fb_mqtt_error (mqtt=0x800c0830, error=FB_MQTT_ERROR_GENERAL, format=0xb7666c89 "Connection timed out") at facebook-mqtt.c:264
#8  0xb7660750 in fb_mqtt_cb_timeout (data=0x800c0830, fd=-1, cond=(unknown: 0)) at facebook-mqtt.c:275
#9  0x80030172 in b_event_passthrough (fd=-1, event=1, data=0x80180538) at events_libevent.c:143
#10 0xb7dfa1a4 in event_process_active_single_queue () from /usr/lib/libevent-2.1.so.5
#11 0xb7dfae93 in event_base_loop () from /usr/lib/libevent-2.1.so.5
#12 0xb7dfb181 in event_base_dispatch () from /usr/lib/libevent-2.1.so.5
#13 0x80030031 in b_main_run () at events_libevent.c:84
#14 0x8002db7b in main (argc=3, argv=0xbffff4b4) at unix.c:172

[dequis]

Decent valgrind log thanks to aam:

==9651== Invalid free() / delete / delete[] / realloc()
==9651==    at 0x4C2EDEB: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==9651==    by 0x1449BC: ssl_disconnect (ssl_gnutls.c:463)
==9651==    by 0x144741: ssl_handshake (ssl_gnutls.c:359)
==9651==    by 0x139CCB: gaim_io_invoke (events_glib.c:86)
==9651==    by 0x5390FD9: g_main_context_dispatch (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.0)
==9651==    by 0x539137F: ??? (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.0)
==9651==    by 0x53916A1: g_main_loop_run (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.0)
==9651==    by 0x139C3B: b_main_run (events_glib.c:59)
==9651==    by 0x1375DC: main (unix.c:178)
==9651==  Address 0x7d66150 is 0 bytes inside a block of size 56 free'd
==9651==    at 0x4C2EDEB: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==9651==    by 0x1449BC: ssl_disconnect (ssl_gnutls.c:463)
==9651==    by 0x83DEC19: fb_mqtt_close (facebook-mqtt.c:239)
==9651==    by 0x83DEC7F: fb_mqtt_dispose (facebook-mqtt.c:63)
==9651==    by 0x8BAFD24: g_object_unref (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x8BC5A11: g_signal_emit_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x8BC6554: g_signal_emit_by_name (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x83DEDA0: fb_mqtt_error (facebook-mqtt.c:264)
==9651==    by 0x83DEF15: fb_mqtt_cb_open (facebook-mqtt.c:568)
==9651==    by 0x144735: ssl_handshake (ssl_gnutls.c:357)
==9651==    by 0x139CCB: gaim_io_invoke (events_glib.c:86)
==9651==    by 0x5390FD9: g_main_context_dispatch (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.0)
==9651==  Block was alloc'd at
==9651==    at 0x4C2FB55: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==9651==    by 0x5396700: g_malloc0 (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.0)
==9651==    by 0x143F6B: ssl_connect (ssl_gnutls.c:116)
==9651==    by 0x83DEFB5: fb_mqtt_open (facebook-mqtt.c:588)
==9651==    by 0x8BADDBD: g_cclosure_marshal_VOID__BOXEDv (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x8BAB1D3: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x8BC59A5: g_signal_emit_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x8BC6554: g_signal_emit_by_name (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.4800.0)
==9651==    by 0x83DEDA0: fb_mqtt_error (facebook-mqtt.c:264)
==9651==    by 0x83DFC4D: fb_mqtt_cb_read (facebook-mqtt.c:358)
==9651==    by 0x139CCB: gaim_io_invoke (events_glib.c:86)
==9651==    by 0x5390FD9: g_main_context_dispatch (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.4800.0)

[dequis]

aam simulator 2016

diff --git a/lib/ssl_gnutls.c b/lib/ssl_gnutls.c
index d720095..9422340 100644
--- a/lib/ssl_gnutls.c
+++ b/lib/ssl_gnutls.c
@@ -344,16 +344,22 @@ static gboolean ssl_connected(gpointer data, gint source, b_input_condition cond
 static gboolean ssl_handshake(gpointer data, gint source, b_input_condition cond)
 {
    struct scd *conn = data;
    int st, stver;

    /* This function returns false, so avoid calling b_event_remove again */
    conn->inpa = -1;

+   if (rand() < (RAND_MAX * 0.5)) {
+       conn->func(conn->data, 0, NULL, cond);
+       ssl_disconnect(conn);
+       return FALSE;
+   }
+
    if ((st = gnutls_handshake(conn->session)) < 0) {
        if (st == GNUTLS_E_AGAIN || st == GNUTLS_E_INTERRUPTED) {
            conn->inpa = b_input_add(conn->fd, ssl_getdirection(conn),
                                     ssl_handshake, data);
        } else {
            conn->func(conn->data, 0, NULL, cond);

            ssl_disconnect(conn);

[andreimarcu]

ty

[dequis]

ty