Re: [Qemu-devel] [Bug 1191606] Re: qemu crashes with iscsi initiator (libiscsi) when using virtio

[Stefan Hajnoczi]

On Tue, Jun 18, 2013 at 02:26:19PM +0200, Laszlo Ersek wrote:
> On 06/18/13 11:38, Stefan Hajnoczi wrote:
> > On Mon, Jun 17, 2013 at 05:37:57PM -0000, Klaus Hochlehnert wrote:
> >> Without debug information I just can provide this (on that server I
> >> can't recompile qemu with debugging information):
> >>
> >> warning: no loadable sections found in added symbol-file system-supplied 
> >> DSO at 0x7fffe67fe000
> >> 0x00007f1bca857313 in poll () from /lib/x86_64-linux-gnu/libc.so.6
> >> (gdb) c
> >> Continuing.
> >> [New Thread 0x7f1bb9a64700 (LWP 36180)]
> >> [Thread 0x7f1bb9a64700 (LWP 36180) exited]
> >> [New Thread 0x7f1bb9a64700 (LWP 36181)]
> >> [Thread 0x7f1bb9a64700 (LWP 36181) exited]
> >> [New Thread 0x7f1bb9a64700 (LWP 36207)]
> >>
> >> Program received signal SIGABRT, Aborted.
> >> 0x00007f1bca7a5425 in raise () from /lib/x86_64-linux-gnu/libc.so.6
> > 
> > The program invoked abort(3).  This is a deliberate fatal error case.
> > 
> > If you're using distro packages, please do the backtrace without symbols
> > ("bt" and "info proc mappings") when gdb stops with SIGABRT and post the
> > package version and distro you are using.
> > 
> > Then I'll download the debuginfo packages from the distro and look up
> > the symbols manually.
> > 
> > If you're using a QEMU built from source then I would need the symbols
> > from you.
> 
> Yes. Yesterday I started responding to this report along the same lines
> -- SIGABRT + raise() is assert() or abort(), but there was no error
> message, hence abort().
> 
> Also, the reporter said in the opening comment that he used
> 
>   Host OS: Ubuntu 12.04 with 13.04-Kernel (3.8)
> 
> which does ship a debuginfo package for qemu-kvm ("qemu-kvm-dbgsym"),
> just some extra repos are needed:
> 
>   https://wiki.ubuntu.com/DebuggingProgramCrash#Debug_Symbol_Packages
> 
> Thus I wanted to recommend the reporter to install the debuginfo package
> and reproduce the crash (as this would not require him to rebuild anything).
> 
> And that's when I noticed
> 
>   qemu version 1.5.0
> 
> (which is not Ubuntu's pristine version in the 12.04 release, ie. it's
> probably a manual build), *with*
> 
>   on that server I can't recompile qemu with debugging information
> 
> and decided it was a lost cause and deleted my email.

I don't think it's a lost cause, we can figure it out but effort will be
required on all sides.

Stefan