[Qemu-devel] [Bug 779151] [NEW] qemu-nbd crash during using with chroot

[Qemu-devel] [Bug 779151] [NEW] qemu-nbd crash during using with chroot

[Guillaume Smaha]

Public bug reported:

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)

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  New

Bug description:
  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)

[Qemu-devel] [Bug 779151] Re: qemu-nbd crash during using with chroot

[Guillaume Smaha]

** Attachment added: "dmesg command"
   https://bugs.launchpad.net/bugs/779151/+attachment/2118648/+files/dmesg.log

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Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  New

Bug description:
  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)

[Qemu-devel] [Bug 779151] Re: qemu-nbd crash during using with chroot

[Guillaume Smaha]

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

** Attachment added: "dmesg command"
   https://bugs.launchpad.net/qemu/+bug/779151/+attachment/2118652/+files/dmesg2.log

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Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  New

Bug description:
  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)

[Qemu-devel] [Bug 779151] Re: qemu-nbd crash during using with chroot

[Michael Tokarev]

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.

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Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  New

Bug description:
  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)

[Qemu-devel] [Bug 779151] Re: qemu-nbd crash during using with chroot

[Guillaume Smaha]

Ok i try to get the informations

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Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  New

Bug description:
  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)

[Qemu-devel] [Bug 779151] Re: qemu-nbd crash during using with chroot

[Thomas Huth]

** Changed in: qemu
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/779151

Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  Incomplete

Bug description:
  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)

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[Qemu-devel] [Bug 779151] Re: qemu-nbd crash during using with chroot

[Launchpad Bug Tracker]

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

** Changed in: qemu
       Status: Incomplete => Expired

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Title:
  qemu-nbd crash during using with chroot

Status in QEMU:
  Expired

Bug description:
  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)

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