harryr / ffff-dnsp2p Goto Github PK

Seems to be some memory corruption going on as the ctx->f4 memory is getting corrupted or freed and is no longer accessible at this point.

dotp2p@main-server:~/ffff-dnsp2p> LD_LIBRARY_PATH=../ffff-dnsp2p/event2/lib gdb --args ./dnsp2p.exe -D 192.168.1.252:12000 -A 192.168.1.252:12001 -P 192.168.1.252:12002 -s state.db -p publish.db -r peers
GNU gdb (GDB; openSUSE 11.1) 6.8.50.20081120-cvs
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
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This GDB was configured as "i586-suse-linux".
For bug reporting instructions, please see:
...
(gdb) run
Starting program: /home/dotp2p/ffff-dnsp2p/dnsp2p.exe -D 192.168.1.252:12000 -A 192.168.1.252:12001 -P 192.168.1.252:12002 -s state.db -p publish.db -r peers
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x0804b8ff in _f4dns_cb_dnsserver (req=0x8069c14, _ctx=0x805cd68) at dns.c:86
86              f4op_t *op = f4op_new(ctx->f4->op_ctx, F4OP_MODE_GET, op_id);
(gdb) bt
#0  0x0804b8ff in _f4dns_cb_dnsserver (req=0x8069c14, _ctx=0x805cd68)
    at dns.c:86
#1  0xb7fd45ff in server_port_read (s=0x8069520) at evdns.c:1194
#2  0xb7fd47df in server_port_ready_callback (fd=16, events=2, arg=0x8069520)
    at evdns.c:1433
#3  0xb7fb279f in event_base_loop (base=0x805c040, flags=)
    at event.c:1287
#4  0x0804a178 in run_stuff (ctx=0x805c3e8) at stub.c:13
#5  0x0804a4f5 in main (argc=13, argv=0xbffff544) at stub.c:92
(gdb) print ctx
$1 = (f4dns_ctx_t *) 0xbffff37e
(gdb) print ctx->f4
$2 = (f4_ctx_t *) 0xf3a40000
(gdb) print ctx->f4->op_ctx
Cannot access memory at address 0xf3a401cc

compiled on Ubuntu 10.04 64bit with self compiled libevent-2.0.9-rc and in stock libgcrypt11 (1.4.4) libtokyocabinet (1.4.23).
running as ./dnsp2p.exe -D 192.168.100.7:53 -A 192.168.100.7:8008 -P 192.168.100.7:21211 -s nodestate -p persistent
gives:
dnsp2p.exe: ffff.c:120: f4_init_peers: Assertion `ctx->peers_file != ((void *)0)' failed.