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

[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

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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

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

[yuchenlin]

I have submitted a patch to prevent hanging in binary search.
See: http://lists.nongnu.org/archive/html/qemu-devel/2018-12/msg05453.html?fbclid=IwAR0ObsaZ4kVMVv6MWIdq0ZCAN5tGhDsd9GmFv8_v7HBTl94Cu5EkRZ3z4n4

Thanks,
Yu-Chen Lin

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You received this bug notification because you are a member of qemu-
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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

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

[Julio Faracco]

I'm almost sure that we need other improvements beyond fixing binary
search deadlock.

It is returning read errors when you apply your patch.

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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

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

[yuchenlin]

Because of lacking zero chunk table, reading zero sector will return EIO.
I have submitted a series to fix this problem.

Please refer to this series: http://lists.nongnu.org/archive/html/qemu-
devel/2018-12/msg05637.html

Thanks,
Yu-Chen Lin

-- 
You received this bug notification because you are a member of qemu-
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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

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

[Julio Faracco]

Hi Yu-Chen.

The series looks good. It fixed the problems related to zero chunk. Nice
work!

I added a comment that I reviewed your patch considering my scenarios
here. At least, It contributes to merge your changes.

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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

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

[Julio Faracco]

Additional info: tested with version 3.0.0. So, before pushing my
commits. Conclusion: This is not a new bug.

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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

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

[Julio Faracco]

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

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https://bugs.launchpad.net/bugs/1809304

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

Status in QEMU:
  Fix Committed

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

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

[Thomas Huth]

Since QEMU 4.0 has been released now, I assume we can close this ticket
as "Fix released"? Or is there still anything left to do here?

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1809304

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

Status in QEMU:
  Fix Committed

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

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

[yuchenlin]

I re-test the dmg img with QEMU 4.0 again, and it works.

In my opinion, the bug can be closed as "Fix released".

Thanks.

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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:
  Fix Committed

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

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

[Thomas Huth]

Thanks for testing. So I'm marking this now as "Fix released".

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

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You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1809304

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

Status in QEMU:
  Fix Released

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