Red Hat Bugzilla – Bug 785556
qemu-nbd dies with nbd.c:nbd_receive_request():L460: read failed
Last modified: 2013-02-11 17:01:21 EST
Description of problem: qemu-nbd dies when trying to e.g. copy an entire filesystem off an LVM partition inside a disk image. This bug has been reported before against previous Fedora releases, and closed when they got EOLed, but what's new here is (a) this is on the latest Fedora, and (b) a reproducable test case. Version-Release number of selected component (if applicable): qemu-common-0.15.1-3.fc16.x86_64 How reproducible: Always Steps to Reproduce: 0. Obtain or create some Linux disk image, which below I've called rawhide.img because it contains a rawhide image 1. modprobe nbd max-part=63 2. qemu-nbd -t -v -c /dev/nbd0 rawhide.img Open a new terminal 3. vgchange -ay 4. mkdir /mnt/rawhide 5. mount -o noatime /dev/mapper/vg-lv_root /mnt/rawhide/ 6. /bin/cp -af /mnt/rawhide . Actual results: after about a minute: ... lots of lines like /bin/cp: `/mnt/rawhide': Input/output error and in the qemu-nbd terminal: connect(unix:/var/lock/qemu-nbd-nbd0): No such file or directory NBD device /dev/nbd0 is now connected to file rawhide.img nbd.c:nbd_receive_request():L460: read failed Expected results: No qemu-nbd crash
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
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Hi Robin, sorry this never got a response. Since F16 is going unsupported, closing as WONTFIX. If you can still reproduce against F18, please reopen. Thankfully though qemu-nbd went from barely maintained to very actively maintained between F16 and F18 qemu versions, so things should be better these days.