[tor-dev] Tor crash debug

[Tim Wilson-Brown - teor]

> On 29 Apr 2016, at 14:05, Nurmi, Juha <juha.nurmi at ahmia.fi> wrote:
> 
> Hi,
> 
> I have been running Tor on tor2web mode[1] and now it has started to crash.
> 
> See error on /log
> http://nzxj65x32vh2fkhk.onion/pwnzwpknl
> 
> To understand the bug I re-installed Tor in Tor2web mode for debbuing:
> 
> make clean && CFLAGS="-ggdb3 -O0" LDFLAGS="-ggdb3" ./configure --disab
> le-asciidoc --enable-tor2web-mode && make && make install
> 
> And running it
> 
> gdb tor
> (gdb) run
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00005555555c02d6 in rend_client_get_random_intro_impl (
>    entry=0x5555555bf1bf <rend_client_fetch_v2_desc+114>, strict=0, warnings=0)
>    at src/or/rendclient.c:1353
> 1353      smartlist_add_all(usable_nodes, entry->parsed->intro_nodes);
> 
> Any ideas what is the problem? Is there anything more I could do to debug this?

Looks like either "entry" or "parsed" is NULL.

You could tell us what version of tor you're running (it's not master, the line numbers are wrong), and give us the last few log messages before the crash.

> [1] https://github.com/globaleaks/Tor2web/wiki/Installation-Guide
> 
> Best,
> Juha
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Tim Wilson-Brown (teor)

teor2345 at gmail dot com
PGP 968F094B
ricochet:ekmygaiu4rzgsk6n



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