[Qemu-devel] [Bug 1635339] Re: qxl_pre_save assertion failure on vm "save"

[Dr. David Alan Gilbert]

An untested hack that might fail cleaner might be:

  error_report("Broken driver ..... migration failed");
  qemu_file_set_error(migrate_get_current()->to_dst_file, -EINVAL);

(untested, probably needs checking it works with savevm).

I must go around and add a return value to pre_save().

We probably also need to make sure some migration testing gets added to
the driver dev

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https://bugs.launchpad.net/bugs/1635339

Title:
  qxl_pre_save assertion failure on vm "save"

Status in QEMU:
  Confirmed

Bug description:
  When I try and save my Windows 10 VM, I see an assertion failure, and
  the machine is shut down.

  I see the following in the log:

  main_channel_handle_parsed: agent start
  qemu-system-x86_64: /build/qemu-Zwynhi/qemu-2.5+dfsg/hw/display/qxl.c:2101: 
qxl_pre_save: Assertion `d->last_release_offset < d->vga.vram_size' failed.
  2016-10-20 11:52:42.713+0000: shutting down

  Please let me know what other information would be relevant!

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