Description of problem: QEMU cannot read the qcow format in version 0.9.1. Creating a virtual machine with the qcow format and then trying to work against it results in: qemu: could not open disk image TheImageName.img (Use the qcow2 format to avoid this) Version-Release number of selected component (if applicable): qemu-0.9.1-5.fc9.i386 How reproducible: Very Steps to Reproduce: 1. qemu-img create -f qcow c.img 3G 2. qemu -cdrom /dev/cdrom -hda c.img -m 256 -boot d Expected results: qemu starting up the virtual machine as usual. Actual results: qemu: could not open disk image c.img Additional info: Quoted without permission (from #qemu@freenode): [Wed May 21 2008] [22:24:16] <danpb_ltop> it could be the security patch we added to validate disk size extents that broke qcow A, hopefully useful, hex dump of a qcow image created with the version of QEMU which has this bug: 0000000 4651 fb49 0000 0100 0000 0000 0000 0000 0000010 0000 0000 0000 0000 0000 0000 00c0 0000 0000020 090c 0000 0000 0000 0000 0000 0000 3000 0000030 0000 0000 0000 0000 0000 0000 0000 0000 * 0003030
Should this be really be set to severity/priority "low"? My F9 box is utterly unable to run my qcow images from another host. I cannot imagine I'm the only one.
Re: [Wed May 21 2008] [22:24:16] <danpb_ltop> it could be the security patch we added to validate disk size extents that broke qcow I can confirm that rebuilding without the "block-rw-range-check" patch seems to make the problem go away. Had a quick glance at the code, but couldn't really figure out why the patch would break things.
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