Segementation Fault

[apowers313]

Running the 'simple_capture' example on OSX causes a segmentation fault. I've narrowed down the error to this line:

pcap_session.findalldevs().forEach(function (dev) {

If I comment out that block of code, the resulting packet capture runs successfully.

[mranney]

Do you get a stack in the core file?

[apowers313]

Didn’t get a core file… it’s been a while since I played this game, but I think there’s a kernel setting / env variable to enable the creation of core files. Let me look into it, and I’ll upload the core if I can create one.

On Thu, Oct 2, 2014 at 1:49 PM, Matt Ranney notifications@github.com
wrote:

Do you get a stack in the core file?

Reply to this email directly or view it on GitHub:
#113 (comment)

[mranney]

Try ulimit -c unlimited

Without a core file it's hard to get a stack, and without a stack, we don't know where it actually crashed.

[apowers313]

See attached for a log with a trace. Since the crash seems to happen while listing the devices, I through in an ifconfig -a as well.

Let me know if you need anything else.

Thanks for looking into it.

Adam

On Thu, Oct 2, 2014 at 4:00 PM, Matt Ranney notifications@github.com
wrote:

Try ulimit -c unlimited

Without a core file it's hard to get a stack, and without a stack, we don't know where it actually crashed.

Reply to this email directly or view it on GitHub:
#113 (comment)

[mranney]

I don't see the log. Can you put it in a gist and paste the link?

[apowers313]

Sorry, I forgot the attachment. :)

Gist is here:

https://gist.github.com/apowers313/94b872a9f9d4c0d0db30#file-gistfile1-txt

On Fri, Oct 3, 2014 at 10:59 AM, Matt Ranney notifications@github.com
wrote:

I don't see the log. Can you put it in a gist and paste the link?

Reply to this email directly or view it on GitHub:
#113 (comment)

[mranney]

If I knew x86 asm, I guess we'd have a better idea of what data is missing here. If you feel adventurous, you could modify the code here:

https://github.com/mranney/node_pcap/blob/master/pcap_binding.cc#L23

And have it print key as a string.

Then go here:

https://github.com/mranney/node_pcap/blob/master/pcap_binding.cc#L37

And see if address is coming back as a valid value. Now that I look at this code, it's pretty bad that we don't check the return value here. So maybe that's something.

Maybe let's see if I can repro. Are you running this program as root? What node version and OSX version are you using?

[mranney]

I'm going to close this issue, but if you come up with a way to repro, please re-open, and I'll take a look.