[Qemu-devel] [Bug 1357445] Re: qemu-img: 'amend -o compat=0.10' command failed with segfault on the fuzzed image

[Max Reitz]

Hi,

being on 2d591ce2aeebf, I rather receive "qemu-img: Error while amending
options: File too large". Judging from the traces, though, this issue
(the segfault at least) should be fixed by my "[PATCH v3 0/7]
block/qcow2: Improve zero cluster expansion" series anyway (when merged
eventually).

Max

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https://bugs.launchpad.net/bugs/1357445

Title:
  qemu-img: 'amend -o compat=0.10' command failed with segfault on the
  fuzzed image

Status in QEMU:
  New

Bug description:
  qemu-img amend -o compat=0.10' failed with a segmentation fault on the
  fuzzed image.

  Sequence:
   1. Unpack the attached archive, make a copy of test.img
   2. Put copy.img and backing_img.qed in the same directory
   3. Execute
     qemu-img amend -o compat=0.10 -f qcow2 copy.img

  Result: qemu-img was killed by SIGSEGV.

  Traces can be found in the attached archive.

  qemu.git HEAD 2d591ce2aeebf

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