Re: [Xen-users] How to investigate xl double free or corruption?

[Charles <c@xxxxxxxxxxxxxxxxxxxx>]

On 21/02/17 18:09, Wei Liu wrote:
> On Sun, Feb 05, 2017 at 10:18:35AM +0530, Charles wrote:
> > Hello xen-users :-)
> >
> > How to investigate xl double free or corruption?
> >
> > After rebooting a Debian 7 server with Xen 4.1 tools, one DomU had not
> > autostarted.
> >
> > Tried to start it manually:
> >
> > root@<redacted>:/etc/xen# xl create <redacted>.cfg
> > Parsing config file <redacted>.cfg
> > *** glibc detected *** /usr/lib/xen-4.1/bin/xl: double free or corruption
> > (!prev): 0x0000000001649010 ***
> > ======= Backtrace: =========
> > /lib/x86_64-linux-gnu/libc.so.6(+0x75bb6)[0x7f2b30ee4bb6]
> > /lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7f2b30ee995c]
> > /lib/x86_64-linux-gnu/libc.so.6(fclose+0x14d)[0x7f2b30ed5afd]
> > /usr/lib/xen-4.1/bin/../lib/libxenlight.so(libxl_userdata_store+0x113)[0x7f2b3183f9a3]
> This already points to one libxl function, so it would be easy to track
> down the double free from there.
>
> Wei.
Thanks Wei

The cause was a full Dom0 /var file system as posted to the list 
05/02/17 12:15 IST
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