Re: [uml-devel] [PATCH] Fix stack corruption

["Christopher S. Aker" <caker@theshore.net>]

> The fix is obvious:
>
> Index: 2.6.10/arch/um/kernel/skas/process.c
> ===================================================================
> --- 2.6.10.orig/arch/um/kernel/skas/process.c 2005-01-12 11:17:22.000000000 -0500
> +++ 2.6.10/arch/um/kernel/skas/process.c 2005-01-12 11:18:03.000000000 -0500
> @@ -323,9 +323,10 @@
>   block_signals();
>   if(sigsetjmp(fork_buf, 1) == 0)
>   new_thread_proc(stack, handler);
> - set_signals(flags);
>
>   remove_sigstack();
> +
> + set_signals(flags);
>  }
>
>  void thread_wait(void *sw, void *fb)

Just a follow up on this for the sake of a paper trail...  This doesn't fix the
test-case below:

http://www.theshore.net/~caker/uml/crashkit-no-console-output/

readme.txt:
----
All you need is an UML guest assigned an IP on your network, iptables, and
the two files below in the same directory.  Run the script, while ping-flooding
the UML's IP address from the host, or another machine on your network.

This script works best with a 2.6 based UML.  I can recreate the crash easily using
2.6.9-linode9 (based on -bb4), also available on this website.
----

I believe we've figured out that this is skas3 specific.  Once you start
ping-flooding the UML, it crashes within a second.

-Chris



-------------------------------------------------------
The SF.Net email is sponsored by: Beat the post-holiday blues
Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek.
It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel