From: "Ulrich Wisser" <ulrich@wisser.se>
To: knot-dns-users@lists.nic.cz
Sent: Wednesday, September 16, 2015 10:41:37 PM
Subject: [knot-dns-users] Knot on Raspberry Pi (armhf)

Hello!

I have tried to get the latest version of Knot running on my Raspberry Pi 2.

Unfortunately does Raspian only have packages for an old version. I updated my Pi to debian jessie. There is actually a version of Raspian based on jessie. That version of Raspian does come with slightly newer packages, but still not up to date.

So I compiled my own version. 2.1.0-dev 

Everything works fine until the moment I try to start knotd. IT will crash with a segfault.

I did recompile with --enable-debug but I do not get any debug output in syslog.

I did run with gdb and got the following information

SYSLOG:

Sep 16 22:36:57 localhost knotd[3522]: info: Knot DNS 2.1.0-dev starting

Sep 16 22:36:57 localhost knotd[3522]: info: binding to interface '2001:470:28:193::53@53'

Sep 16 22:36:57 localhost knotd[3522]: info: configured 1 zones

Sep 16 22:36:57 localhost knotd[3522]: info: changing GID to '1003'

Sep 16 22:36:57 localhost knotd[3522]: info: changing UID to '1002'

Sep 16 22:36:57 localhost knotd[3522]: info: loading zones

Sep 16 22:36:57 localhost knotd[3522]: info: [example.com] zone will be loaded, serial 0

Sep 16 22:36:57 localhost knotd[3522]: info: starting server

GDB:

[New Thread 0x50baa200 (LWP 3526)]

[New Thread 0x50aaa200 (LWP 3527)]

Program received signal SIGSEGV, Segmentation fault.

[Switching to Thread 0x50baa200 (LWP 3526)]

scanner_process (scanner=0x50978008) at knot/zone/zonefile.c:152

152 if (zc->ret != KNOT_EOK) {

(gdb) bt

#0  scanner_process (scanner=0x50978008) at knot/zone/zonefile.c:152

#1  0x76d80a14 in ?? () from /usr/lib/arm-linux-gnueabihf/libzscanner.so.0

Backtrace stopped: previous frame identical to this frame (corrupt stack?)

(gdb) l

147

148 /*! \brief Creates RR from parser input, passes it to handling function. */

149 static void scanner_process(zs_scanner_t *scanner)

150 {

151 zcreator_t *zc = scanner->data;

152 if (zc->ret != KNOT_EOK) {

153 scanner->stop = true;

154 return;

155 }

156

(gdb) 

It seems that the scanner thread is somehow missing. But why? Anybody with experience with knot on armhf?

/Ulrich

--

Ulrich Wisser

ulrich@wisser.se

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