kern/79665: [panic] "unmount: dangling vnode" on amd activit

[Nate Smith]

The following reply was made to PR kern/79665; it has been noted by GNATS.

From: Nate Smith <nate at netapp.com>
To: bug-followup at FreeBSD.org, nate at netapp.com
Cc:  
Subject: Re: kern/79665: [panic] "unmount: dangling vnode" on amd activit
Date: Tue, 8 Nov 2005 20:27:49 -0800 (PST)

 This is also reproduceable under FreeBSD 5.3-RELEASE-p23 with updated am-utils
 from the ports collection:
 
 # uname -a
 FreeBSD xxxxx.eng.netapp.com 5.3-RELEASE-p23 FreeBSD 5.3-RELEASE-p23 #7: Wed Nov  2 18:04:49 PST 2005     root at xxxxx.eng.netapp.com:/usr/obj/usr/src/sys/SMP  i386
 
 # more info.3
 Good dump found on device /dev/da0s1b
    Architecture: i386
    Architecture version: 1
    Dump length: 1610350592B (1535 MB)
    Blocksize: 512
    Dumptime: Tue Nov  8 19:37:29 2005
    Hostname: xxxxx.eng.netapp.com
    Versionstring: FreeBSD 5.3-RELEASE-p23 #7: Wed Nov  2 18:04:49 PST 2005
      root at xxxxx.eng.netapp.com:/usr/obj/usr/src/sys/SMP
    Panicstring: unmount: dangling vnode
    Bounds: 3
 
 similar backtrace:
 
 #0  doadump () at pcpu.h:159
 #1  0xc060d54f in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:397
 #2  0xc060d875 in panic (fmt=0xc0821eb7 "unmount: dangling vnode")
      at /usr/src/sys/kern/kern_shutdown.c:553
 #3  0xc065bd11 in vfs_mount_destroy (mp=0xc2f52c00, td=0xc3420c80)
      at /usr/src/sys/kern/vfs_mount.c:523
 #4  0xc065d2d8 in dounmount (mp=0xc2f52c00, flags=0, td=0xc3420c80)
      at /usr/src/sys/kern/vfs_mount.c:1160
 #5  0xc065cf14 in unmount (td=0xc3420c80, uap=0xe816ad14)
      at /usr/src/sys/kern/vfs_mount.c:1068
 #6  0xc07bb33f in syscall (frame=
        {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 0, tf_esi = 136871872, tf_eb                        p = -1077941512, tf_isp = -401166988, tf_ebx = -2012650824, tf_edx = 135024768,                         tf_ecx = 134711040, tf_eax = 22, tf_trapno = 22, tf_err = 2, tf_eip = -201226967                        3, tf_cs = 31, tf_eflags = 662, tf_esp = -1077941556, tf_ss = 47})
      at /usr/src/sys/i386/i386/trap.c:1001
 #7  0xc07a8acf in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:201
 #8  0x0000002f in ?? ()
 #9  0x0000002f in ?? ()
 #10 0x0000002f in ?? ()
 #11 0x00000000 in ?? ()
 #12 0x08287fc0 in ?? ()
 #13 0xbfbfeaf8 in ?? ()
 ---Type <return> to continue, or q <return> to quit---
 #14 0xe816ad74 in ?? ()
 #15 0x880962b8 in ?? ()
 #16 0x080c5080 in ?? ()
 #17 0x08078700 in ?? ()
 #18 0x00000016 in ?? ()
 #19 0x00000016 in ?? ()
 #20 0x00000002 in ?? ()
 #21 0x880f3397 in ?? ()
 #22 0x0000001f in ?? ()
 #23 0x00000296 in ?? ()
 #24 0xbfbfeacc in ?? ()
 #25 0x0000002f in ?? ()
 #26 0x8806a3d8 in ?? ()
 #27 0x00000000 in ?? ()
 #28 0x88053868 in ?? ()
 #29 0x8805169b in ?? ()
 #30 0x307b6000 in ?? ()
 #31 0xc35ab388 in ?? ()
 #32 0xc3420c80 in ?? ()
 #33 0xe816aa6c in ?? ()
 #34 0xe816aa54 in ?? ()
 #35 0xc2bc2190 in ?? ()
 #36 0xc061db57 in sched_switch (td=0x8287fc0, newtd=0x880962b8, flags=Cannot access memory at address 0xbfbfeb08
 )
 ---Type <return> to continue, or q <return> to quit---
      at /usr/src/sys/kern/sched_4bsd.c:865
 Previous frame inner to this frame (corrupt stack?)
 
 
 # /usr/sbin/amd -v
 Copyright (c) 1997-2005 Erez Zadok
 Copyright (c) 1990 Jan-Simon Pendry
 Copyright (c) 1990 Imperial College of Science, Technology & Medicine
 Copyright (c) 1990 The Regents of the University of California.
 am-utils version 6.1.2.1 (build 1).
 Report bugs to https://bugzilla.am-utils.org/ or am-utils at am-utils.org.
 Configured by root at xxxxx.eng.netapp.com on date Tue Nov  8 17:35:46 PST 2005.
 Built by root at xxxxx.eng.netapp.com on date Tue Nov 8 17:39:11 PST 2005.
 cpu=i386 (little-endian), arch=i386, karch=i386.
 full_os=freebsd5.3, os=freebsd5, osver=5.3, vendor=portbld, distro=none.
 domain=eng.netapp.com, host=xxxxx, hostd=xxxxx.eng.netapp.com.
 Map support for: root, passwd, hesiod, union, nis, file, exec, error.
 AMFS: nfs, link, nfsx, nfsl, host, linkx, program, union, ufs, cdfs,
        pcfs, auto, direct, toplvl, error, inherit.
 FS: cd9660, nfs, nfs3, msdosfs, ufs, unionfs.
 Network 1: wire="10.56.112.0" (netnumber=10.56.112).
 Network 2: wire="10.56.8.0" (netnumber=10.56.8).
 
 
 --
 -Nate Smith <nate at netapp.com>