Updating to git's v2.1.x to go on a post-Easter bughunt and found the following accounting packet[1] seems to segfault freeradius: ---- tcpdump: listening on bond0, link-type EN10MB (Ethernet), capture size 65535 bytes 11:30:34.398885 IP6 (hlim 51, next-header UDP (17) payload length: 258) 2001:630:1:128::185.42390 > 2001:630:1b:6003:90c0:802a:d873:c284.1813: [bad udp cksum 51b1!] RADIUS, length: 250 Accounting Request (4), id: 0x1b, Authenticator: 44b81fb81af404cb48816ad0c2afc497 NAS IP Address Attribute (4), length: 6, Value: 128.86.129.105 Accounting Status Attribute (40), length: 6, Value: Stop Username Attribute (1), length: 19, Value: 223313@soas.ac.uk NAS Port Attribute (5), length: 6, Value: 0 NAS Port Type Attribute (61), length: 6, Value: Wireless - IEEE 802.11 Accounting Session ID Attribute (44), length: 27, Value: 223313@s7CC5376FE7E3-C189 Accounting Input Octets Attribute (42), length: 6, Value: 42426 Accounting Output Octets Attribute (43), length: 6, Value: 351596 Accounting Input Packets Attribute (47), length: 6, Value: 301 Accounting Output Packets Attribute (48), length: 6, Value: 379 Accounting Termination Cause Attribute (49), length: 6, Value: Idle Timeout Framed IP Address Attribute (8), length: 6, Value: 128.86.184.37 Calling Station Attribute (31), length: 14, Value: 7CC5376FE7E3 Called Station Attribute (30), length: 14, Value: 000B860E5100 Accounting Session Time Attribute (46), length: 6, Value: 06:40 min Accounting Delay Attribute (41), length: 6, Value: 00 secs Vendor Specific Attribute (26), length: 15, Value: Vendor: Unknown (14823) Vendor Attribute: 5, Length: 7, Value: eduroam Vendor Specific Attribute (26), length: 11, Value: Vendor: Unknown (14823) Vendor Attribute: 6, Length: 3, Value: N/A Vendor Specific Attribute (26), length: 20, Value: Vendor: Unknown (14823) Vendor Attribute: 1, Length: 12, Value: pre-employee Vendor Specific Attribute (26), length: 12, Value: Vendor: Unknown (14823) Vendor Attribute: 2, Length: 4, Value: .... Unknown Attribute (103), length: 6, Value: Proxy State Attribute (33), length: 20, Value: OSC-Extended-Id=27 ---- The gdb backtrace is: ---- Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x42b7b470 (LWP 9963)] 0x402dc2bc in strnlen () from /lib/libc.so.6 (gdb) where #0 0x402dc2bc in strnlen () from /lib/libc.so.6 #1 0x403075d8 in fnmatch () from /lib/libc.so.6 #2 0x409da598 in do_detail (instance=0x114e50, request=0x43443240, packet=0x43446dd8, compat=<value optimized out>) at rlm_detail.c:301 #3 0x00022110 in call_modsingle (component=3, c=<value optimized out>, request=0x43443240) at modcall.c:297 #4 modcall (component=3, c=<value optimized out>, request=0x43443240) at modcall.c:670 #5 0x0001ec94 in indexed_modcall (comp=3, idx=0, request=0x43443240) at modules.c:737 #6 0x0000eefc in rad_accounting (request=0x43443240) at acct.c:93 #7 0x0002f16c in radius_handle_request (request=0x43443240, fun=0xee60 <rad_accounting>) at event.c:3780 #8 0x00026a4c in request_handler_thread (arg=<value optimized out>) at threads.c:525 #9 0x400818cc in start_thread () from /lib/libpthread.so.0 #10 0x40330bdc in clone () from /lib/libc.so.6 #11 0x40330bdc in clone () from /lib/libc.so.6 Backtrace stopped: previous frame identical to this frame (corrupt stack?) ---- If you need the FreeRADIUS -X malarkey, then do ask, it is just tricker to get on a production box... :) Cheers [1] http://stuff.digriz.org.uk/freeradius-acct-segfault.pcap -- Alexander Clouter .sigmonster says: Preserve the old, but know the new.