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Re: Re: reproducible kernel crash with quota

On Thu, 14 Apr 2022, J. Hannken-Illjes wrote:

Date: Thu, 14 Apr 2022 13:09:02 +0200
From: J. Hannken-Illjes <>
Cc:, Manuel Bouyer <>
Subject: [Extern] Re: reproducible kernel crash with quota

On 12. Apr 2022, at 08:52, wrote:


since I already have some open bugs with reproducible kernel crashes, I'm only writing this to the mailing list.

how to reproduce the crash: /etc/rc.d/quota restart


[   412.047595] panic: kernel diagnostic assertion "dq->dq_ump->um_quotas[dq->dq _type] != vp" failed: file "/usr/src/sys/ufs/ufs/ufs_quota.c", line 978
[   412.047595] cpu8: Begin traceback...
[   412.047595] vpanic() at netbsd:vpanic+0x156
[   412.057595] kern_assert() at netbsd:kern_assert+0x4b
[   412.057595] dqflush() at netbsd:dqflush+0x92
[   412.057595] quota1_handle_cmd_quotaoff() at netbsd:quota1_handle_cmd_quotaof f+0x120
[   412.057595] ufs_quotactl() at netbsd:ufs_quotactl+0x3d
[   412.057595] VFS_QUOTACTL() at netbsd:VFS_QUOTACTL+0x22
[   412.057595] vfs_quotactl_quotaoff() at netbsd:vfs_quotactl_quotaoff+0x1b
[   412.057595] do_sys_quotactl() at netbsd:do_sys_quotactl+0xf1
[   412.067595] sys___quotactl() at netbsd:sys___quotactl+0x2e
[   412.067595] syscall() at netbsd:syscall+0x196
[   412.067595] --- syscall (number 473) ---
[   412.067595] netbsd:syscall+0x196:
[   412.067595] cpu8: End traceback...

[   412.067595] dumping to dev 168,1 (offset=8, size=33425953):
[   412.067595] dump

(gdb) target kvm netbsd.1.core

I'm quite sure you have a /etc/fstab with "userquota,groupquota", yes?

with gdb:

frame 4 (dqflush())
print dq->dq_ump->um_quotas[0]
print dq->dq_ump->um_quotas[1]

gives the same vnode address for both fields, yes?

If this is the case the attached diff should help, since 2012-01-30
group quota got enabled on the user quota file.

As a workaround you could try to name the quota files in /etc/fstab
like "groupquota=XXX/".

You are right. I use groupquota and userquota in fstab. I tested the patch. With patch there is no crash. But the /etc/rc.d/quota restart leads to the blocking of the file system. You can only turn off the server. This also happens when I only use userquota in the fstab.

Thank you for your efforts


Maybe someone can fix the problem.

Thank you for your efforts


J. Hannken-Illjes -

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