Introduce the concept of tests that will be ran one after the other.
This new test will send static message that will lead to the opening
of a PDP context. At this point one should use ping with a large
packet size and suspend/stop the emulator. Once the NS connection is
considered dead the SGSN will crash with a double free.
Reproduce:
0.) Add IMSI 901700000003094 to the ACL
1.) Stop/Suspend the emulation process so the NS Alive times out
2.) Use ping IP -s 2048
This will create a double free...
#4 0xb7bb2646 in talloc_abort_double_free () at talloc.c:175
#5 0xb7bbd41a in talloc_chunk_from_ptr (ptr=0x8091208) at talloc.c:190
#6 _talloc_free (ptr=0x8091208) at talloc.c:517
#7 talloc_free (ptr=ptr@entry=0x8091208) at talloc.c:990
#8 0xb7bb319b in msgb_free (m=m@entry=0x8091208) at msgb.c:72
#9 0x0804db54 in sndcp_send_ud_frag (fs=0xbfffcc6c) at gprs_sndcp.c:423
#10 sndcp_unitdata_req (msg=msg@entry=0x808eed8, lle=0x808fbc8, nsapi=5 '\005',
mmcontext=mmcontext@entry=0x80903e8) at gprs_sndcp.c:471
This will send a static message. It will trigger the GMM code
on the SGSN and might ask us for the IMEI/IMSI or send us an
accept. As we are not replying at all the SGSN needs to send new
requests and we can observe if the sequence number is increasing
like it should.
Holger Hans Peter Freyther