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FS#173 - Double Free -- Crash/Coredump and possible security vulnerability User who did this - Bayan Towfiq (btowfiq)

---------- I also had a crash with dlgnewref -- it was not during shutdown:

Program terminated with signal 11, Segmentation fault. #0 0x00007f11fb8bbe61 in dlg_lookup (h_entry=9097, h_id=1731333290) at dlg_hash.c:442 442 if (h_entry>=d_table->size) (gdb) bt #0 0x00007f11fb8bbe61 in dlg_lookup (h_entry=9097, h_id=1731333290) at dlg_hash.c:442 #1 0x00007f11fb8b2bf5 in unref_dlg_from_cb (t=<value optimized out>, type=1731333290, param=0x7fffb1193a40) at dlg_handlers.c:964 #2 0x00007f1200dea164 in run_trans_callbacks_internal (cb_lst=<value optimized out>, type=32768, trans=0x7f11eb1e1750, params=0x7fffb1193a40) at t_hooks.c:290 #3 0x00007f1200dea503 in run_trans_callbacks (type=32768, trans=<value optimized out>, req=<value optimized out>, rpl=0x0, code=0) at t_hooks.c:317 #4 0x00007f1200dcfc9a in free_cell (dead_cell=0x7f11eb1e1750) at h_table.c:152 #5 0x00007f1200dcfe68 in free_hash_table () at h_table.c:443 #6 0x00007f1200ddff15 in tm_shutdown () at t_funcs.c:126 #7 0x00000000004e25af in destroy_modules () at sr_module.c:783 #8 0x00000000004616ff in cleanup (show_status=1) at main.c:564 #9 0x000000000046236b in shutdown_children (show_status=1, sig=<value optimized out>) at main.c:706 #10 0x0000000000463382 in handle_sigs () at main.c:797 #11 0x000000000046451e in main_loop () at main.c:1741 #12 0x0000000000465f98 in main (argc=11, argv=0x7fffb1193ef8) at main.c:2508

(gdb) bt full #0 0x00007f11fb8bbe61 in dlg_lookup (h_entry=9097, h_id=1731333290) at dlg_hash.c:442 dlg = <value optimized out> d_entry = <value optimized out> #1 0x00007f11fb8b2bf5 in unref_dlg_from_cb (t=<value optimized out>, type=1731333290, param=0x7fffb1193a40) at dlg_handlers.c:964 dlg = <value optimized out> iuid = 0x2389 #2 0x00007f1200dea164 in run_trans_callbacks_internal (cb_lst=<value optimized out>, type=32768, trans=0x7f11eb1e1750, params=0x7fffb1193a40) at t_hooks.c:290 cbp = 0x7f11eb1b8620 backup_from = 0x8cb110 backup_to = 0x8cb118 backup_dom_from = 0x8cb120 backup_dom_to = 0x8cb128 backup_uri_from = 0x8cb100 backup_uri_to = 0x8cb108 backup_xavps = 0x8cb210 #3 0x00007f1200dea503 in run_trans_callbacks (type=32768, trans=<value optimized out>, req=<value optimized out>, rpl=0x0, code=0) at t_hooks.c:317 params = {req = 0x0, rpl = 0x0, param = 0x7f11eb1b8630, code = 0, flags = 0, branch = 0, t_rbuf = 0x0, dst = 0x0, send_buf = {s = 0x0, len = 0}} #4 0x00007f1200dcfc9a in free_cell (dead_cell=0x7f11eb1e1750) at h_table.c:152 b = <value optimized out> i = <value optimized out> rpl = <value optimized out> tt = <value optimized out> foo = <value optimized out> cbs = <value optimized out> __FUNCTION__ = "free_cell" #5 0x00007f1200dcfe68 in free_hash_table () at h_table.c:443 p_cell = 0x2389 tmp_cell = 0x7f11eaee5dc8 i = 598 __FUNCTION__ = "free_hash_table" #6 0x00007f1200ddff15 in tm_shutdown () at t_funcs.c:126 No locals. #7 0x00000000004e25af in destroy_modules () at sr_module.c:783 t = <value optimized out> foo = 0x7f12028fe0f0 __FUNCTION__ = "destroy_modules" #8 0x00000000004616ff in cleanup (show_status=1) at main.c:564 memlog = <value optimized out> __FUNCTION__ = "cleanup" #9 0x000000000046236b in shutdown_children (show_status=1, sig=<value optimized out>) at main.c:706 No locals. #10 0x0000000000463382 in handle_sigs () at main.c:797 chld = 0 chld_status = 134 memlog = <value optimized out> #11 0x000000000046451e in main_loop () at main.c:1741 i = 8 pid = <value optimized out> si = 0x0 si_desc = "udp receiver child=7 sock=70.167.xxx.xxx:5160\000\000\000\000\000@\020", '\000' <repeats 12 times>, "\016\b\000\000\000\000\000\000\000=\206=\220]֛&\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\300\v\215\000\000\000\000\000"\000\000\000\000\000\000\000\000\000@\020", '\000' <repeats 11 times> #12 0x0000000000465f98 in main (argc=11, argv=0x7fffb1193ef8) at main.c:2508 cfg_stream = <value optimized out> c = <value optimized out> r = <value optimized out> tmp = 0x7fffb1195e83 "" ---Type <return> to continue, or q <return> to quit--- tmp_len = 0 port = <value optimized out> proto = <value optimized out> ret = <value optimized out> seed = 3986280357 rfd = <value optimized out> debug_save = 272629760 debug_flag = 34 dont_fork_cnt = 0 n_lst = 0x10400000 p = <value optimized out> ----------

More information can be found at the following URL: http://sip-router.org/tracker/index.php?do=details&task_id=173#comment40...

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