[Qemu-devel] [Bug 1809304] [NEW] qemu-img convert is freezing for some DMG files.

[Julio Faracco]

Public bug reported:

Recently, I created a file using hdiutil from MacOS (using Zlib
compression):

$ hdiutil create -volname MyVolName -srcfolder /path/to/my/vol/ -ov
-format UDZO myvolname.dmg

But, when I try to convert this volume using qemu-img convert, this
command is freezing.

I'm using the upstream version to test it.

It is freezing inside the binary search method to retrieve the chunk.

But, I still don't know why.

I'm attaching the file as an example.

It can be mounted using MacOS or other Linux apps like hfsleuth and
darling-dmg.

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: dmg qemu-img

** Attachment added: "Firefox-Zlib.dmg"
   
https://bugs.launchpad.net/bugs/1809304/+attachment/5223852/+files/Firefox-Zlib.dmg

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1809304

Title:
  qemu-img convert is freezing for some DMG files.

Status in QEMU:
  New

Bug description:
  Recently, I created a file using hdiutil from MacOS (using Zlib
  compression):

  $ hdiutil create -volname MyVolName -srcfolder /path/to/my/vol/ -ov
  -format UDZO myvolname.dmg

  But, when I try to convert this volume using qemu-img convert, this
  command is freezing.

  I'm using the upstream version to test it.

  It is freezing inside the binary search method to retrieve the chunk.

  But, I still don't know why.

  I'm attaching the file as an example.

  It can be mounted using MacOS or other Linux apps like hfsleuth and
  darling-dmg.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1809304/+subscriptions