Help debugging core dump

General
1

I have a core dump on v1.1.0 that occurs under VideoRoom production load. It occurred twice before I reverted back to an older version. I ran GDB on it and got the following: PasteBin

It occurs at janus.c:3872, which is in janus_plugin_handle_sdp():

if(!have_msid) {
	g_free(medium->msid);

Unfortunately, my GDB skill is quite limited. What should I do to identify the issue? I can provide the binary and the core, or even the login to the box.

2

Based on the error message and the provided context, it seems that the issue is related to the shared libraries on the Linux system. The error message indicates that some shared libraries could not be loaded, and there may be a version mismatch between the shared library being loaded and the expected version.

One possible solution could be to check the system’s installed shared libraries and their versions to ensure that they are compatible with Janus server. You can use the ldd command to check the shared library dependencies of the Janus server and verify that all the required shared libraries are installed and accessible.

It is also possible that Janus Server was built with an incompatible or outdated version of a shared library, which could cause the segmentation fault error. In this case, you may need to rebuild the Janus program with the correct version of the shared libraries.

Another possibility is that there may be a problem with the installation of the shared libraries themselves. In this case, you may need to reinstall the shared libraries or upgrade to a newer version of the operating system that includes updated shared libraries.

Without more specific information about the system, Janus installation used and the shared libraries in question, provide more details in that regards , that’s my 2 cents .
Thanks

3

Thanks for the suggestions there. I forgot to explain my setup: I’m running Janus inside a slimmed-down docker container, which didn’t have anything for debugging. So I copied the core, and binary, out to the host environment (CentOS 7), and ran GDB there. The host env is also a production system, so it didn’t have any libraries. I’ll try to find the original box it was built on, and run it there.

4

ok noted, will hear from you as much

5

If you suspect a bug in Janus, try with a recent commit and enable AddressSanitizer.
In case it’s confirmed please open an issue on github.