Re: kern/42205: kernel panic at activated userquota

[6bone%6bone.informatik.uni-leipzig.de@localhost]

The following reply was made to PR kern/42205; it has been noted by GNATS.

From: 6bone%6bone.informatik.uni-leipzig.de@localhost
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, 
netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/42205: kernel panic  at activated userquota
Date: Thu, 5 Nov 2009 07:55:41 +0100 (CET)

 qsync vp wihout ip: vnode @ 0xffff8000974df5f0, flags (10<MPSAFE>)
          tag VT_UFS(1), type VLNK(5), usecount 1, writecount 0, holdcount 
 0
          freelisthd 0x0, mount 0xffff800072988000, data 
 0xffff8000974e0dc0 lock 0xffff8000974df6f8 recursecnt 0
          tag VT_UFS, ino 55338475, on dev 19, 4 flags 0x0, effnlink 1, 
 nlink 1
          mode 0120775, owner 1007, group 100, size 31
 
 
 Regards
 Uwe
 
 
 On Fri, 
 30 Oct 2009, Manuel Bouyer wrote:
 
 > Date: Fri, 30 Oct 2009 15:30:05 +0000 (UTC)
 > From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
 > Reply-To: gnats-bugs%NetBSD.org@localhost
 > To: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
 >     netbsd-bugs%netbsd.org@localhost, 
 > 6bone%6bone.informatik.uni-leipzig.de@localhost
 > Subject: Re: kern/42205: kernel panic  at activated userquota
 > 
 > The following reply was made to PR kern/42205; it has been noted by GNATS.
 >
 > From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc: kern-bug-people%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
 > netbsd-bugs%NetBSD.org@localhost,
 >        6bone%6bone.informatik.uni-leipzig.de@localhost
 > Subject: Re: kern/42205: kernel panic  at activated userquota
 > Date: Fri, 30 Oct 2009 16:27:52 +0100
 >
 > --QTprm0S8XgL7H0Dt
 > Content-Type: text/plain; charset=us-ascii
 > Content-Disposition: inline
 >
 > On Fri, Oct 30, 2009 at 07:35:02AM +0000, 
 > 6bone%6bone.informatik.uni-leipzig.de@localhost wrote:
 > >  Hello
 > >
 > >  now a dump from the last panic:
 > >
 > >  uvm_fault(0xffffffff80c7a620, 0x0, 1) -> e
 > >  fatal page fault in supervisor mode
 > >  trap type 6 code 0 rip ffffffff803e4863 cs 8 rflags 10246 cr2  70 cpl 0
 > >  rsp fff0
 > >  kernel: page fault trap, code=0
 > >  Stopped in pid 0.61 (system) at netbsd:qsync+0x103:     movq
 > >  0x70(%rdx,%rax,8
 > >  ),%r14
 > >  db{2}> trace
 > >  qsync() at netbsd:qsync+0x103
 > >  ffs_sync() at netbsd:ffs_sync+0x2eb
 > >  VFS_SYNC() at netbsd:VFS_SYNC+0x33
 > >  sync_fsync() at netbsd:sync_fsync+0x85
 > >  VOP_FSYNC() at netbsd:VOP_FSYNC+0x71
 > >  sched_sync() at netbsd:sched_sync+0x15d
 >
 > So it's still VOTI(vp) being NULL.
 > Can you install the attached patch ? When it runs on a null inode here
 > it will print the associated vnode (and hopefully avoid the panic :)
 > Please monitor console output or dmesg and when the vprint fires,
 > report it there.
 >
 > --
 > Manuel Bouyer, LIP6, Universite Paris VI.           
 > Manuel.Bouyer%lip6.fr@localhost
 >      NetBSD: 26 ans d'experience feront toujours la difference
 > --
 >
 > --QTprm0S8XgL7H0Dt
 > Content-Type: text/plain; charset=us-ascii
 > Content-Disposition: attachment; filename="quota.diff"
 >
 > Index: ufs/ufs/ufs_quota.c
 > ===================================================================
 > RCS file: /cvsroot/src/sys/ufs/ufs/ufs_quota.c,v
 > retrieving revision 1.60.10.3
 > diff -u -p -u -r1.60.10.3 ufs_quota.c
 > --- ufs/ufs/ufs_quota.c      7 Aug 2009 05:59:44 -0000       1.60.10.3
 > +++ ufs/ufs/ufs_quota.c      30 Oct 2009 15:27:13 -0000
 > @@ -743,6 +743,14 @@ qsync(struct mount *mp)
 >                      }
 >                      continue;
 >              }
 > +            if (VTOI(vp) == NULL) {
 > +                    vprint("qsync vp wihout ip", vp);
 > +                    mutex_enter(&mntvnode_lock);
 > +                    vunmark(mvp);
 > +                    vlockmgr(vp->v_vnlock, LK_RELEASE);
 > +                    vrele(vp);
 > +                    goto again;
 > +            }
 >              for (i = 0; i < MAXQUOTAS; i++) {
 >                      dq = VTOI(vp)->i_dquot[i];
 >                      if (dq == NODQUOT)
 >
 > --QTprm0S8XgL7H0Dt--
 >
 >