Help on debugging Freeradius

Wed Dec 16 10:35:54 CET 2009

Hi,

I can view thread information of radiusd process by attaching its process ID
into gdb as follows

gdb -q - 19201

After that

(gdb) bt
#0  0x00000037ed8cc4c2 in select () from /lib64/libc.so.6
#1  0x00002aefb56dd817 in fr_event_loop (el=0x72848a0) at event.c:378
#2  0x000000000041a877 in main (argc=<value optimized out>, argv=0x3ec) at
radiusd.c:398

Does it have any implication on Radius crashes that happened before?

Regards,

Dinh

On Wed, Dec 16, 2009 at 4:13 PM, Dinh Pham Cong <dinhpc at vega.com.vn> wrote:

> Hi all,
>
> My Freeradiusd 2.1.7 got crashed a lot of times today so I decided to run
> radiusd in gdb
>
> /etc/init.d/radiusd stop
> # gdb /usr/local/sbin/radiusd
> GNU gdb Fedora (6.8-27.el5)
> Copyright (C) 2008 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <
> http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-redhat-linux-gnu"...
> (gdb) set logging file gdb-radiusd.log
> (gdb) set logging on
> Copying output to gdb-radiusd.log.
> (gdb) run
> Starting program: /usr/local/sbin/radiusd
> [Thread debugging using libthread_db enabled]
> [New Thread 0x2b34e4b7fe10 (LWP 27411)]
> [New Thread 0x41c8b940 (LWP 27414)]
> [Thread 0x41c8b940 (LWP 27414) exited]
> Detaching after fork from child process 27416.
>
> Program exited normally.
> (gdb)
> (gdb)
> (gdb)
> (gdb) info threads
> No registers.
> (gdb) thread apply all bt full
> No registers.
> (gdb) info threads
> No registers.
> (gdb) bt
> No stack.
>
> I already re-compiled FreeRadius with -enable-developer and set
> allows_core_dump = yes in the configuration file. But I don't know why I can
> not get the back trace when the segmentation fault happens
>
> Dec 16 13:10:01 MobileTV-6 kernel: radiusd[1639]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aabfeef5180 error 4
> Dec 16 15:14:06 MobileTV-6 kernel: radiusd[5486]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aab4b7d6180 error 4
> Dec 16 15:14:06 MobileTV-6 kernel: radiusd[11466]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aaf2c785180 error 4
> Dec 16 15:27:16 MobileTV-6 kernel: radiusd[16567]: segfault at
> 0000000000000098 rip 0000003daee530f1 rsp 00002aacc4820180 error 4
> Dec 16 15:27:16 MobileTV-6 kernel: radiusd[24913]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aae33d64180 error 4
> Dec 16 15:31:42 MobileTV-6 kernel: radiusd[26558]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aab453bb150 error 6
> Dec 16 15:31:42 MobileTV-6 kernel: radiusd[27347]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aad3da66150 error 6
> Dec 16 15:31:42 MobileTV-6 kernel: radiusd[27322]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aad2e04d150 error 6
> Dec 16 15:31:42 MobileTV-6 kernel: radiusd[26487]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aab18d74150 error 6
> Dec 16 15:32:21 MobileTV-6 kernel: radiusd[30883]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aabc3896150 error 6
> Dec 16 15:32:21 MobileTV-6 kernel: radiusd[31407]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aad1742f150 error 6
> Dec 16 15:32:21 MobileTV-6 kernel: radiusd[31156]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aac6e3a7150 error 6
> Dec 16 15:32:21 MobileTV-6 kernel: radiusd[31460]: segfault at
> 0000000000000002 rip 0000003daee51b35 rsp 00002aad38665150 error 6
> Dec 16 15:35:53 MobileTV-6 kernel: radiusd[32595]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aab7740b180 error 4
> Dec 16 15:43:55 MobileTV-6 kernel: radiusd[4822]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aac53f7c780 error 4
> Dec 16 15:44:07 MobileTV-6 kernel: radiusd[14485]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aaecf241180 error 4
> Dec 16 15:44:20 MobileTV-6 kernel: radiusd[15346]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aab2ff99180 error 4
> Dec 16 15:44:33 MobileTV-6 kernel: radiusd[18676]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aae233e5180 error 4
> Dec 16 15:57:44 MobileTV-6 kernel: radiusd[27191]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aae381a2180 error 4
> Dec 16 15:57:56 MobileTV-6 kernel: radiusd[31469]: segfault at
> 00000000000000c8 rip 0000003daee5306b rsp 00002aaacbef9180 error 4
>
>
> uname -a
> Linux MobileTV-6 2.6.18-128.el5 #1 SMP Wed Jan 21 10:41:14 EST 2009 x86_64
> x86_64 x86_64 GNU/Linux
>
> free -m
>              total       used       free     shared    buffers     cached
> Mem:         16044       4825      11219          0        158       3332
> -/+ buffers/cache:       1334      14710
> Swap:         2047          0       2047
>
> ulimit -a
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 137216
> max locked memory       (kbytes, -l) 32
> max memory size         (kbytes, -m) unlimited
> open files                      (-n) 100000
> pipe size            (512 bytes, -p) 8
> POSIX message queues     (bytes, -q) 819200
> real-time priority              (-r) 0
> stack size              (kbytes, -s) 10240
> cpu time               (seconds, -t) unlimited
> max user processes              (-u) 137216
> virtual memory          (kbytes, -v) unlimited
> file locks                      (-x) unlimited
>
> Could you kindly point me the right direction?
>
> Thanks,
>
> Dinh
>
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