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Date: Thu, 23 Jul 2009 08:30:05 GMT
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To: freebsd-fs@FreeBSD.org
From: Thomas Backman <serenity@exscape.org>
Cc: 
Subject: Re: kern/132337: [zfs] [panic] kernel panic in zfs_fuid_create_cred
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The following reply was made to PR kern/132337; it has been noted by GNATS.

From: Thomas Backman <serenity@exscape.org>
To: bug-followup@FreeBSD.org,
 freebsd@r.zeeb.org
Cc: freebsd-fs@freebsd.org,
 FreeBSD current <freebsd-current@freebsd.org>
Subject: Re: kern/132337: [zfs] [panic] kernel panic in zfs_fuid_create_cred
Date: Thu, 23 Jul 2009 10:22:13 +0200

 Hey all,
 Unfortunately, this PR appears to still be unfixed. Is anyone looking  
 at this?
 I tried to set up a diskless client over NFS yesterday, running ZFS  
 on /, and ran in to this panic (exact same backtrace as the PR (see  
 bottom the this mail)) a lot of times. In the end, I created a ZVOL  
 with UFS on it, and the panics disappeared as expected - since it no  
 longer has to work directly with files on a ZFS *filesystem*.
 It seems to be pretty easy to trigger, as I couldn't finish the boot  
 process on the diskless client more than once until I went with UFS.  
 Since then I've gotten 0 panics.
 
 FWIW, my /etc/exports (I know now R/W NFS root isn't a good idea, but  
 it might be relevant):
 /diskless -maproot=0 -alldirs 192.168.1.6
 
 Regards,
 Thomas
 
 Backtrace:
 
 panic: zfs_fuid_create_cred
 cpuid = x
 KDB: stack backtrace:
 db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
 panic() at panic+0x182
 zfs_fuid_create_cred() at zfs_fuid_create_cred+0x56
 zfs_perm_init() at zfs_perm_init+0x84
 zfs_mknode() at zfs_mknode+0x24e
 zfs_freebsd_create() at zfs_freebsd_create+0x617
 VOP_CREATE_APV() at VOP_CREATE_APV+0xb3
 nfsrv_create() at nfsrv_create+0x909
 nfssvc_program() at nfssvc_program+0x1a1
 svc_run_internal() at svc_run_internal+0x62b
 svc_thread_start() at svc_thread_start+0xb
 fork_exit() at fork_exit+0x12a
 fork_trampoline() at fork_trampoline+0xe