[Qemu-devel] [Bug 1355697] Re: qemu-img: Segfault on a fuzzed image with large values of L1/L2 entries

[Max Reitz]

Hi,

Okay, so this image has the same “issue” (it's intentionally broken, so
it's not really an issue) as the one in bug 1355738: There are corrupted
L2 entries which are impossible for qemu to repair. Therefore, we could
only ask the user to use qemu-img convert and that's all we can do.
Therefore, I'm marking this fixed as well.

Max

** Changed in: qemu
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1355697

Title:
  qemu-img: Segfault on a fuzzed image with large values of L1/L2
  entries

Status in QEMU:
  Fix Committed

Bug description:
  'qemu-img check -r all/leaks' failed with a segmentation fault on the
  fuzzed image with L1/L2 entry values having UINT64 border values.

  Sequence:
   1. Unpack the attached archive, make a copy of test.img
   2. Put copy.img and backing_img.raw in the same directory
   3. Execute
     
  qemu-img check -f qcow2 -r all copy.img

  Result: qemu-img was killed by SIGSEGV.

  The qemu-img execution log can be found in the attached archive.

  
  qemu.git HEAD 2d591ce2aeebf

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