qemu-nbd crash during using with chroot

[Guillaume Smaha]

I use qemu-nbd to mount my image. And after some times, qemu-nbd crashes and so the chroot freeze.

ps aux | grep qemu :
root 2223 0.0 0.0 9776 548 ? Ss 18:03 0:00 qemu-nbd --connect=/dev/nbd0 /chroots/test/virtual.img
root 2224 0.0 0.0 10800 544 ? D 18:03 0:00 qemu-nbd --connect=/dev/nbd0 /chroots/test/virtual.img
root 2227 0.0 0.0 0 0 ? Z 18:03 0:00 [qemu-nbd] <defunct>
root 2357 0.0 0.0 5212 768 pts/0 D+ 18:07 0:00 grep qemu

mount :
/dev/nbd0p1 on /chroots/test/amd64 type ext3 (rw,errors=remount-ro,commit=0)
/dev on /chroots/test/amd64/dev type devtmpfs (rw,mode=0755)
/dev/pts on /chroots/test/amd64/dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
/proc on /chroots/test/amd64/proc type proc (rw)
/sys on /chroots/test/amd64/sys type sysfs (rw,noexec,nosuid,nodev)

[Guillaume Smaha (guillaume-smaha)]

After reboot and mount the image, qemu-nbd crashes directly.

[Michael Tokarev (mjt+launchpad-tls)]

Please provide some gdb backtrace from the failing qemu-nbd process, ie, show the root cause of the problem instead of showing multiple symptoms.

Run qemu-nbd under gdb and when it crashes, run "bt" command. Before doing so, ensure you've debugging symbols for your qemu-nbd binary.

And the most important part - what's the format of the image you're running qemu-nbd against, and what version of qemu-nbd you're using?

Without all this, your bugreport is useless.

Thanks.

[Guillaume Smaha (guillaume-smaha)]

Ok i try to get the informations

[Launchpad Janitor (janitor)]

[Expired for QEMU because there has been no activity for 60 days.]