Bug 787171
| Summary: | WARNING: at fs/dcache.c:2458 prepend_path+0x18c/0x1a0() (sys_getcwd) | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Dmitri Skok <dima_skok> | ||||
| Component: | kernel | Assignee: | nfs-maint | ||||
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | unspecified | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 16 | CC: | allane, awilliam, dhowells, gansalmon, hk-vndr, ikent, itamar, jforbes, jonathan, kernel-maint, madhu.chinakonda, robn, rwheeler, tlindsay42, wendellcraigbaker | ||||
| Target Milestone: | --- | Keywords: | Reopened | ||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | abrt_hash:1e9306a1f48f43e683a7398d43d20e526ba4c46f first=3.3 tested=3.5 nfs | ||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2012-11-14 20:37:58 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Description
Dmitri Skok
2012-02-03 11:41:05 UTC
*** Bug 794692 has been marked as a duplicate of this bug. *** *** Bug 795195 has been marked as a duplicate of this bug. *** *** Bug 797056 has been marked as a duplicate of this bug. *** *** Bug 801142 has been marked as a duplicate of this bug. *** See also, bug 766277 Created attachment 568784 [details]
sudo tail -400 /var/log/messages
Also on the most recent kernel
Linux hippie 3.2.6-3.fc16.i686.PAE #1 SMP Mon Feb 13 20:44:23 UTC 2012 i686 i686 i386 GNU/Linux
I'm running autofs with a direct map on /
$ cat /etc/auto/direct
/vault -defaults,vers=3,rw server1:/vault
/work -defaults,vers=3,rw server2:/work
/srv -defaults,vers=3,rw server3:/srv
These faults occur when the network interface bounce under the control of NetworkManager.
The scene here was
a) cleaning up the /etc/sysconfig/network-scripts/ifcfg-* files to comply with the new NetworkManager that doesn't do aliases (the same way)
b) ifup wlan0
The machine is otherwise happy enough. nfs is running, automount does it's job.
the latest kernel update in testing has some extra debug patch to print out the mountpoint where the file lives, which might aid in debugging. *** Bug 805343 has been marked as a duplicate of this bug. *** Same nfs scheme as in Comment 6, different host, slightly different hardware. establishing a new version of ifcfg-em2 and route-em2 as (the moral equivalent of) sudo cp $pwd/{ifcfg,route}-em2 /etc/sysconfig/network-scripts/. This caused NetworkManager to bounce the interface and reestablish routes on it. FWIW, em2 is the WAN side with static IPv4 assignment and IPV6INIT=no per the guidance of https://bugzilla.redhat.com/show_bug.cgi?id=753482 on deepened ... the newer kernel. $ uname -a Linux deepened 3.3.0-4.fc16.i686 #1 SMP Tue Mar 20 18:45:14 UTC 2012 i686 i686 i386 GNU/Linux ... from /var/log/messages Mar 31 15:50:15 deepened kernel: [25783.213984] ------------[ cut here ]------------ Mar 31 15:50:15 deepened kernel: [25783.214008] WARNING: at fs/dcache.c:2536 prepend_path+0x184/0x190() Mar 31 15:50:15 deepened kernel: [25783.214063] Hardware name: Stylistic ST5011D Mar 31 15:50:15 deepened kernel: [25783.214072] Root dentry has weird name <> vfsmnt: fs:nfs Mar 31 15:50:15 deepened kernel: [25783.214078] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat xt_recent xt_geoip(O) nf_connt rack_ipv4 nf_defrag_ipv4 xt_multiport nfs fscache auth_rpcgss nfs_acl ppdev parport_pc lp parport lockd ip6t_REJECT nf_conntrack_ip v6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables 3c59x apanel input_polldev irda crc_ccitt snd_intel8x0m snd_inte l8x0 snd_ac97_codec ac97_bus snd_seq snd_seq_device fujitsu_tablet fujitsu_laptop snd_pcm mii tg3 snd_timer iTCO_wdt iTCO_vendor_su pport snd soundcore i2c_i801 snd_page_alloc uinput serio_raw sunrpc microcode firewire_ohci firewire_core yenta_socket crc_itu_t i9 15 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] Mar 31 15:50:15 deepened kernel: [25783.214231] Pid: 3561, comm: lmesg Tainted: G W O 3.3.0-4.fc16.i686 #1 Mar 31 15:50:15 deepened kernel: [25783.214239] Call Trace: Mar 31 15:50:15 deepened kernel: [25783.214258] [<c04373b2>] warn_slowpath_common+0x72/0xa0 Mar 31 15:50:15 deepened kernel: [25783.214270] [<c0548254>] ? prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.214281] [<c0548254>] ? prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.214294] [<c0437483>] warn_slowpath_fmt+0x33/0x40 Mar 31 15:50:15 deepened kernel: [25783.214305] [<c0548254>] prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.214320] [<c054a080>] sys_getcwd+0xc0/0x170 Mar 31 15:50:15 deepened kernel: [25783.214335] [<c092e7b4>] syscall_call+0x7/0xb Mar 31 15:50:15 deepened kernel: [25783.214345] ---[ end trace c24797e104c4e1d6 ]--- Mar 31 15:50:15 deepened kernel: [25783.287778] ------------[ cut here ]------------ Mar 31 15:50:15 deepened kernel: [25783.287797] WARNING: at fs/dcache.c:2536 prepend_path+0x184/0x190() Mar 31 15:50:15 deepened kernel: [25783.287802] Hardware name: Stylistic ST5011D Mar 31 15:50:15 deepened kernel: [25783.287807] Root dentry has weird name <> vfsmnt: fs:nfs Mar 31 15:50:15 deepened kernel: [25783.287811] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat xt_recent xt_geoip(O) nf_connt rack_ipv4 nf_defrag_ipv4 xt_multiport nfs fscache auth_rpcgss nfs_acl ppdev parport_pc lp parport lockd ip6t_REJECT nf_conntrack_ip v6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables 3c59x apanel input_polldev irda crc_ccitt snd_intel8x0m snd_inte l8x0 snd_ac97_codec ac97_bus snd_seq snd_seq_device fujitsu_tablet fujitsu_laptop snd_pcm mii tg3 snd_timer iTCO_wdt iTCO_vendor_su pport snd soundcore i2c_i801 snd_page_alloc uinput serio_raw sunrpc microcode firewire_ohci firewire_core yenta_socket crc_itu_t i9 15 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] Mar 31 15:50:15 deepened kernel: [25783.287908] Pid: 3561, comm: sudo Tainted: G W O 3.3.0-4.fc16.i686 #1 Mar 31 15:50:15 deepened kernel: [25783.287914] Call Trace: Mar 31 15:50:15 deepened kernel: [25783.287927] [<c04373b2>] warn_slowpath_common+0x72/0xa0 Mar 31 15:50:15 deepened kernel: [25783.287934] [<c0548254>] ? prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.287941] [<c0548254>] ? prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.287948] [<c0437483>] warn_slowpath_fmt+0x33/0x40 Mar 31 15:50:15 deepened kernel: [25783.287955] [<c0548254>] prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.287965] [<c054a080>] sys_getcwd+0xc0/0x170 Mar 31 15:50:15 deepened kernel: [25783.287975] [<c092e7b4>] syscall_call+0x7/0xb Mar 31 15:50:15 deepened kernel: [25783.287981] ---[ end trace c24797e104c4e1d7 ]--- Mar 31 15:50:15 deepened kernel: [25783.362999] ------------[ cut here ]------------ Mar 31 15:50:15 deepened kernel: [25783.362999] ------------[ cut here ]------------ Mar 31 15:50:15 deepened kernel: [25783.363062] WARNING: at fs/dcache.c:2536 prepend_path+0x184/0x190() Mar 31 15:50:15 deepened kernel: [25783.363067] Hardware name: Stylistic ST5011D Mar 31 15:50:15 deepened kernel: [25783.363072] Root dentry has weird name <> vfsmnt: fs:nfs Mar 31 15:50:15 deepened kernel: [25783.363077] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat xt_recent xt_geoip(O) nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport nfs fscache auth_rpcgss nfs_acl ppdev parport_pc lp parport lockd ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables 3c59x apanel input_polldev irda crc_ccitt snd_intel8x0m snd_intel8x0 snd_ac97_codec ac97_bus snd_seq snd_seq_device fujitsu_tablet fujitsu_laptop snd_pcm mii tg3 snd_timer iTCO_wdt iTCO_vendor_support snd soundcore i2c_i801 snd_page_alloc uinput serio_raw sunrpc microcode firewire_ohci firewire_core yenta_socket crc_itu_t i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan] Mar 31 15:50:15 deepened kernel: [25783.363173] Pid: 3561, comm: sudo Tainted: G W O 3.3.0-4.fc16.i686 #1 Mar 31 15:50:15 deepened kernel: [25783.363178] Call Trace: Mar 31 15:50:15 deepened kernel: [25783.363190] [<c04373b2>] warn_slowpath_common+0x72/0xa0 Mar 31 15:50:15 deepened kernel: [25783.363198] [<c0548254>] ? prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.363204] [<c0548254>] ? prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.363212] [<c0437483>] warn_slowpath_fmt+0x33/0x40 Mar 31 15:50:15 deepened kernel: [25783.363219] [<c0548254>] prepend_path+0x184/0x190 Mar 31 15:50:15 deepened kernel: [25783.363228] [<c054a080>] sys_getcwd+0xc0/0x170 Mar 31 15:50:15 deepened kernel: [25783.363239] [<c092e7b4>] syscall_call+0x7/0xb Mar 31 15:50:15 deepened kernel: [25783.363248] [<c092007b>] ? wakeup_secondary_cpu_via_nmi+0x25/0xe6 Mar 31 15:50:15 deepened kernel: [25783.363254] ---[ end trace c24797e104c4e1d8 ]--- After the incident, autofs was wedged (wouldn't mount anything). sudo systemctl restart autofs.service returned autofs to service. The machine didn't have to be rebooted after stability. *** Bug 825631 has been marked as a duplicate of this bug. *** This seems to be fixed in 3.4 judging by the lack of new reports. Just saw this on 3.5.2-3.fc17.x86_64: [1260288.254188] WARNING: at fs/dcache.c:2622 prepend_path+0x1bc/0x1d0() [1260288.259271] Hardware name: X7DW3 [1260288.264366] Root dentry has weird name <> vfsmnt: fs:nfs [1260288.269520] Modules linked in: nfs nfs_acl auth_rpcgss fscache lockd sunrpc nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack igb ptp pps_core lpc_ich mfd_core coretemp i5400_edac ioatdma i2c_i801 edac_core dca i5k_amb shpchp serio_raw kvm_intel kvm microcode binfmt_misc radeon i2c_algo_bit drm_kms_helper ttm drm i2c_core [last unloaded: scsi_wait_scan] [1260288.286189] Pid: 20816, comm: fuser Tainted: G W 3.5.2-3.fc17.x86_64 #1 [1260288.291560] Call Trace: [1260288.296784] [<ffffffff810584bf>] warn_slowpath_common+0x7f/0xc0 [1260288.301961] [<ffffffff810585b6>] warn_slowpath_fmt+0x46/0x50 [1260288.307046] [<ffffffff8119c5cc>] prepend_path+0x1bc/0x1d0 [1260288.312108] [<ffffffff812d8c01>] ? vsnprintf+0x51/0x600 [1260288.317197] [<ffffffff8119c63c>] path_with_deleted+0x5c/0xa0 [1260288.322269] [<ffffffff8119d5f5>] d_path+0xa5/0xe0 [1260288.327343] [<ffffffff811a8a21>] seq_path+0x51/0xd0 [1260288.332403] [<ffffffff811e700d>] show_map_vma+0x14d/0x270 [1260288.337478] [<ffffffff810657b2>] ? ptrace_may_access+0x32/0x50 [1260288.342550] [<ffffffff811e737c>] show_map+0x2c/0x90 [1260288.347594] [<ffffffff811e7413>] show_pid_map+0x13/0x20 [1260288.352614] [<ffffffff811a8850>] seq_read+0x230/0x3b0 [1260288.357615] [<ffffffff81188339>] vfs_read+0xa9/0x180 [1260288.362562] [<ffffffff8118845a>] sys_read+0x4a/0x90 [1260288.367492] [<ffffffff81614969>] system_call_fastpath+0x16/0x1b [1260288.372424] ---[ end trace d2645d2dbebf2d22 ]--- The system is in a weird state; autofs has gone and made some strange directory: dr-xr-xr-x. 2 root root 0 Aug 30 19:31 /home/tibbs that I can't access: ls: cannot open directory /home/tibbs: Too many levels of symbolic links autofs isn't even running at this point. In trying to make that directory go away (unmounting it, unmounting /home) I'm getting the above kernel spew. # Mass update to all open bugs. Kernel 3.6.2-1.fc16 has just been pushed to updates. This update is a significant rebase from the previous version. Please retest with this kernel, and let us know if your problem has been fixed. In the event that you have upgraded to a newer release and the bug you reported is still present, please change the version field to the newest release you have encountered the issue with. Before doing so, please ensure you are testing the latest kernel update in that release and attach any new and relevant information you may have gathered. If you are not the original bug reporter and you still experience this bug, please file a new report, as it is possible that you may be seeing a different problem. (Please don't clone this bug, a fresh bug referencing this bug in the comment is sufficient). With no response, we are closing this bug under the assumption that it is no longer an issue. If you still experience this bug, please feel free to reopen the bug report. Hi, Just started getting this on a very recent kernel: cat /proc/version Linux version 3.6.7-4.fc16.x86_64 (mockbuild.fedoraproject.org) (gcc version 4.6.3 20120306 (Red Hat 4.6.3-2) (GCC) ) #1 SMP Tue Nov 20 20:33:31 UTC 2012 Dec 1 22:33:30 zurich kernel: [47181.650103] ------------[ cut here ]------------ Dec 1 22:33:30 zurich kernel: [47181.650110] WARNING: at fs/dcache.c:2630 prepend_path+0x1e1/0x1f0() Dec 1 22:33:30 zurich kernel: [47181.650112] Hardware name: SX58 Dec 1 22:33:30 zurich kernel: [47181.650114] Root dentry has weird name <> vfsmnt: fs:nfs Dec 1 22:33:30 zurich kernel: [47181.650115] Modules linked in: tcp_lp ppdev parport_pc lp parport nfsv3 nfs_acl nfsv4 auth_rpcgss nfs fscache dns_resolver lockd tpm_bios fuse nvidia(PO) snd_hda_codec_hdmi snd_hda_codec_realtek i7core_edac edac_core snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc r8169 mii sunrpc iTCO_wdt iTCO_vendor_support lpc_ich coretemp serio_raw i2c_i801 i2c_core mfd_core kvm_intel kvm uinput microcode mxm_wmi crc32c_intel wmi Dec 1 22:33:30 zurich kernel: [47181.650155] Pid: 27382, comm: gnome-system-mo Tainted: P W O 3.6.7-4.fc16.x86_64 #1 Dec 1 22:33:30 zurich kernel: [47181.650157] Call Trace: Dec 1 22:33:30 zurich kernel: [47181.650163] [<ffffffff8105c69f>] warn_slowpath_common+0x7f/0xc0 Dec 1 22:33:30 zurich kernel: [47181.650166] [<ffffffff8105c796>] warn_slowpath_fmt+0x46/0x50 Dec 1 22:33:30 zurich kernel: [47181.650170] [<ffffffff811a2d91>] prepend_path+0x1e1/0x1f0 Dec 1 22:33:30 zurich kernel: [47181.650175] [<ffffffff812dfd01>] ? bstr_printf+0x371/0x3a0 Dec 1 22:33:30 zurich kernel: [47181.650178] [<ffffffff811a2dfc>] path_with_deleted+0x5c/0xa0 Dec 1 22:33:30 zurich kernel: [47181.650182] [<ffffffff811a35eb>] d_path+0xab/0xe0 Dec 1 22:33:30 zurich kernel: [47181.650186] [<ffffffff811af4b1>] seq_path+0x51/0xc0 Dec 1 22:33:30 zurich kernel: [47181.650192] [<ffffffff811ee26b>] show_map_vma+0x15b/0x290 Dec 1 22:33:30 zurich kernel: [47181.650195] [<ffffffff811ee421>] show_smap+0x81/0x1f0 Dec 1 22:33:30 zurich kernel: [47181.650199] [<ffffffff811ef620>] ? smaps_pte_entry+0x210/0x210 Dec 1 22:33:30 zurich kernel: [47181.650203] [<ffffffff811ee5c3>] show_pid_smap+0x13/0x20 Dec 1 22:33:30 zurich kernel: [47181.650206] [<ffffffff811af1cb>] seq_read+0x16b/0x400 Dec 1 22:33:30 zurich kernel: [47181.650211] [<ffffffff8118df20>] vfs_read+0xb0/0x180 Dec 1 22:33:30 zurich kernel: [47181.650214] [<ffffffff8118e03a>] sys_read+0x4a/0x90 Dec 1 22:33:30 zurich kernel: [47181.650219] [<ffffffff81621ce9>] system_call_fastpath+0x16/0x1b Dec 1 22:33:30 zurich kernel: [47181.650221] ---[ end trace 7efe48ede83b6720 ]--- Please let me know what other info you may need. Thanks, Henry |