[Bug 1848556] Re: qemu-img check failing on remote image in Eoan

[Christian Ehrhardt ]

Quick checks:
- does not depend on the exact image, e.g. 
https://cloud-images.ubuntu.com/eoan/current/eoan-server-cloudimg-amd64.img or 
https://download.fedoraproject.org/pub/fedora/linux/releases/30/Cloud/x86_64/images/Fedora-Cloud-Base-30-1.2.x86_64.qcow2
 hang as well
- the former qemu 3.1 based qemu-utils work fine

Maybe that helps to identify a known patch that might already exist.
Even it if doesn't the simple repro in comment #2 should still help.

If there is no immediate idea out of the data we have let me know, this
seems bisectable to me.

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1848556

Title:
  qemu-img check failing on remote image in Eoan

Status in QEMU:
  Confirmed
Status in qemu package in Ubuntu:
  New

Bug description:
  The "qemu-img check" function is failing on remote (HTTP-hosted)
  images, beginning with Ubuntu 19.10 (qemu-utils version 1:4.0+dfsg-
  0ubuntu9). With previous versions, through Ubuntu 19.04/qemu-utils
  version 1:3.1+dfsg-2ubuntu3.5, the following worked:

  $ /usr/bin/qemu-img check  
http://10.193.37.117/cloud/eoan-server-cloudimg-amd64.img
  No errors were found on the image.
  19778/36032 = 54.89% allocated, 90.34% fragmented, 89.90% compressed clusters
  Image end offset: 514064384

  The 10.193.37.117 server holds an Apache server that hosts the cloud
  images on a LAN. Beginning with Ubuntu 19.10/qemu-utils 1:4.0+dfsg-
  0ubuntu9, the same command never returns. (I've left it for up to an
  hour with no change.) I'm able to wget the image from the same server
  and installation on which qemu-img check fails. I've tried several
  .img files on the server, ranging from Bionic to Eoan, with the same
  results with all of them.

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