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Date: Wed, 18 Sep 2013 14:50:35 +0200
From: Stefan Hajnoczi <stefanha@gmail.com>
Message-ID: <20130918125035.GF13359@stefanha-thinkpad.redhat.com>
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Subject: Re: [Qemu-devel] qemu-nbd segmentation fault
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To: "ing. Mario De Chenno" <mario.dechenno@unina2.it>
Cc: qemu-devel@nongnu.org

On Tue, Sep 17, 2013 at 02:53:51PM +0200, ing. Mario De Chenno wrote:
> I cannot use qemu-nbd to write files to a qcow2 disk image. It always exit
> after a while with a segmentation fault.

Hi Mario,
Thanks for providing the strace.  Is it possible for you to post a
backtrace?

The backtrace shows where exactly the segfault occurs.  Try this:

  $ gdb --args path/to/qemu-nbd test.img

When the qemu-nbd process crashes you will be at the gdb prompt and can
print the backtrace:

  (gdb) bt

Please post the gdb output.

Thanks,
Stefan