device: 0.499
graphic: 0.466
vnc: 0.411
mistranslation: 0.402
other: 0.376
semantic: 0.373
instruction: 0.355
network: 0.350
boot: 0.315
socket: 0.293
assembly: 0.198
KVM: 0.109

qemu-nbd crash during using with chroot

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)



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

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.

Ok i try to get the informations

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