WARNING: at /build/buildd/linux-3.0.0/fs/dcache.c:1360 d_set_d_op+0xb1/0xc0()

[edab]

I upgraded to the latest version of VirtualBox (4.18) ~ 2 days ago, I saw the following entry in my syslog. My VBox guest is Ubuntu 11.10 running on a Windows7 host. The hardware is a Compaq Presario CQ62 laptop with 8GB of RAM, AMD Athlon II Dual-Core P320 (Caspian) processor. The following events which I assume are Vox related.

Jun 23 11:17:01 eddie-vb CRON[3576]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Jun 23 11:45:02 eddie-vb kernel: [14326.695807] ------------[ cut here ]------------
Jun 23 11:45:02 eddie-vb kernel: [14326.695819] WARNING: at /build/buildd/linux-3.0.0/fs/dcache.c:1356 d_set_d_op+0x8e/0xc0()
Jun 23 11:45:02 eddie-vb kernel: [14326.695822] Hardware name: VirtualBox
Jun 23 11:45:02 eddie-vb kernel: [14326.695823] Modules linked in: vboxsf bnep des_generic rfcomm bluetooth md4 vboxvideo drm vesafb nls_utf8 xt_hl cifs ip6t_rt binfmt_misc snd_intel8x0 snd_ac97_codec nf_conntrack_ipv6 nf_defrag_ipv6 ac97_bus ipt_REJECT snd_pcm xt_multiport xt_limit snd_seq_midi xt_tcpudp xt_addrtype snd_rawmidi snd_seq_midi_event snd_seq xt_state ppdev snd_timer ip6table_filter ip6_tables snd_seq_device nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp snd nf_nat soundcore nf_conntrack_ipv4 nf_defrag_ipv4 joydev nf_conntrack_ftp nf_conntrack vboxguest snd_page_alloc parport_pc i2c_piix4 psmouse serio_raw iptable_filter lp parport ip_tables x_tables usbhid hid ahci libahci e1000
Jun 23 11:45:02 eddie-vb kernel: [14326.695874] Pid: 3889, comm: vim Not tainted 3.0.0-22-generic #36-Ubuntu
Jun 23 11:45:02 eddie-vb kernel: [14326.695877] Call Trace:
Jun 23 11:45:02 eddie-vb kernel: [14326.695883]  [<ffffffff8105e91f>] warn_slowpath_common+0x7f/0xc0
Jun 23 11:45:02 eddie-vb kernel: [14326.695887]  [<ffffffff8105e97a>] warn_slowpath_null+0x1a/0x20
Jun 23 11:45:02 eddie-vb kernel: [14326.695890]  [<ffffffff8117d21e>] d_set_d_op+0x8e/0xc0
Jun 23 11:45:02 eddie-vb kernel: [14326.695896]  [<ffffffffa02f623d>] sf_instantiate.isra.1+0xcd/0x180 [vboxsf]
Jun 23 11:45:02 eddie-vb kernel: [14326.695900]  [<ffffffffa02f649f>] sf_create_aux+0x1af/0x250 [vboxsf]
Jun 23 11:45:02 eddie-vb kernel: [14326.695905]  [<ffffffffa02f6573>] sf_create+0x13/0x20 [vboxsf]
Jun 23 11:45:02 eddie-vb kernel: [14326.695909]  [<ffffffff81174fa4>] vfs_create+0xb4/0x120
Jun 23 11:45:02 eddie-vb kernel: [14326.695912]  [<ffffffff81176329>] do_last+0x649/0x730
Jun 23 11:45:02 eddie-vb kernel: [14326.695915]  [<ffffffff81177f8a>] path_openat+0xca/0x3f0
Jun 23 11:45:02 eddie-vb kernel: [14326.695918]  [<ffffffff811783b2>] do_filp_open+0x42/0xa0
Jun 23 11:45:02 eddie-vb kernel: [14326.695923]  [<ffffffff812f7051>] ? strncpy_from_user+0x31/0x40
Jun 23 11:45:02 eddie-vb kernel: [14326.695927]  [<ffffffff8117373a>] ? do_getname+0x10a/0x180
Jun 23 11:45:02 eddie-vb kernel: [14326.695931]  [<ffffffff815f4e2e>] ? _raw_spin_lock+0xe/0x20
Jun 23 11:45:02 eddie-vb kernel: [14326.695934]  [<ffffffff81185827>] ? alloc_fd+0xf7/0x150
Jun 23 11:45:02 eddie-vb kernel: [14326.695939]  [<ffffffff81167eed>] do_sys_open+0xed/0x220
Jun 23 11:45:02 eddie-vb kernel: [14326.695942]  [<ffffffff8116d6da>] ? sys_readlinkat+0x7a/0xb0
Jun 23 11:45:02 eddie-vb kernel: [14326.695945]  [<ffffffff81168040>] sys_open+0x20/0x30
Jun 23 11:45:02 eddie-vb kernel: [14326.695949]  [<ffffffff815fd2c2>] system_call_fastpath+0x16/0x1b
Jun 23 11:45:02 eddie-vb kernel: [14326.695952] ---[ end trace 3143457a90365bdb ]---
Jun 23 11:45:02 eddie-vb kernel: [14326.695954] ------------[ cut here ]------------
Jun 23 11:45:02 eddie-vb kernel: [14326.695957] WARNING: at /build/buildd/linux-3.0.0/fs/dcache.c:1360 d_set_d_op+0xb1/0xc0()
Jun 23 11:45:02 eddie-vb kernel: [14326.695959] Hardware name: VirtualBox
Jun 23 11:45:02 eddie-vb kernel: [14326.695960] Modules linked in: vboxsf bnep des_generic rfcomm bluetooth md4 vboxvideo drm vesafb nls_utf8 xt_hl cifs ip6t_rt binfmt_misc snd_intel8x0 snd_ac97_codec nf_conntrack_ipv6 nf_defrag_ipv6 ac97_bus ipt_REJECT snd_pcm xt_multiport xt_limit snd_seq_midi xt_tcpudp xt_addrtype snd_rawmidi snd_seq_midi_event snd_seq xt_state ppdev snd_timer ip6table_filter ip6_tables snd_seq_device nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp snd nf_nat soundcore nf_conntrack_ipv4 nf_defrag_ipv4 joydev nf_conntrack_ftp nf_conntrack vboxguest snd_page_alloc parport_pc i2c_piix4 psmouse serio_raw iptable_filter lp parport ip_tables x_tables usbhid hid ahci libahci e1000
Jun 23 11:45:02 eddie-vb kernel: [14326.695995] Pid: 3889, comm: vim Tainted: G        W   3.0.0-22-generic #36-Ubuntu
Jun 23 11:45:02 eddie-vb kernel: [14326.695997] Call Trace:
Jun 23 11:45:02 eddie-vb kernel: [14326.696000]  [<ffffffff8105e91f>] warn_slowpath_common+0x7f/0xc0
Jun 23 11:45:02 eddie-vb kernel: [14326.696004]  [<ffffffff8105e97a>] warn_slowpath_null+0x1a/0x20
Jun 23 11:45:02 eddie-vb kernel: [14326.696007]  [<ffffffff8117d241>] d_set_d_op+0xb1/0xc0
Jun 23 11:45:02 eddie-vb kernel: [14326.696011]  [<ffffffffa02f623d>] sf_instantiate.isra.1+0xcd/0x180 [vboxsf]
Jun 23 11:45:02 eddie-vb kernel: [14326.696015]  [<ffffffffa02f649f>] sf_create_aux+0x1af/0x250 [vboxsf]
Jun 23 11:45:02 eddie-vb kernel: [14326.696019]  [<ffffffffa02f6573>] sf_create+0x13/0x20 [vboxsf]
Jun 23 11:45:02 eddie-vb kernel: [14326.696022]  [<ffffffff81174fa4>] vfs_create+0xb4/0x120
Jun 23 11:45:02 eddie-vb kernel: [14326.696025]  [<ffffffff81176329>] do_last+0x649/0x730
Jun 23 11:45:02 eddie-vb kernel: [14326.696028]  [<ffffffff81177f8a>] path_openat+0xca/0x3f0
Jun 23 11:45:02 eddie-vb kernel: [14326.696031]  [<ffffffff811783b2>] do_filp_open+0x42/0xa0
Jun 23 11:45:02 eddie-vb kernel: [14326.696034]  [<ffffffff812f7051>] ? strncpy_from_user+0x31/0x40
Jun 23 11:45:02 eddie-vb kernel: [14326.696037]  [<ffffffff8117373a>] ? do_getname+0x10a/0x180
Jun 23 11:45:02 eddie-vb kernel: [14326.696040]  [<ffffffff815f4e2e>] ? _raw_spin_lock+0xe/0x20
Jun 23 11:45:02 eddie-vb kernel: [14326.696043]  [<ffffffff81185827>] ? alloc_fd+0xf7/0x150
Jun 23 11:45:02 eddie-vb kernel: [14326.696046]  [<ffffffff81167eed>] do_sys_open+0xed/0x220
Jun 23 11:45:02 eddie-vb kernel: [14326.696049]  [<ffffffff8116d6da>] ? sys_readlinkat+0x7a/0xb0
Jun 23 11:45:02 eddie-vb kernel: [14326.696053]  [<ffffffff81168040>] sys_open+0x20/0x30
Jun 23 11:45:02 eddie-vb kernel: [14326.696056]  [<ffffffff815fd2c2>] system_call_fastpath+0x16/0x1b
Jun 23 11:45:02 eddie-vb kernel: [14326.696058] ---[ end trace 3143457a90365bdc ]---
Jun 23 12:00:01 eddie-vb CRON[3985]: (eddie) CMD (/home/eddie/bin/disktest.sh > /dev/null 2>&1; echo "disktest.sh RC = $?  $(date)" > /tmp/disktest.log)
Jun 23 12:00:01 eddie-vb postfix/pickup[3536]: DE6F6C0111: uid=1000 from=<eddie>