Bug 770899

Summary: [abrt] kernel: WARNING: at fs/dcache.c:2458 prepend_path+0x18c/0x1a0()
Product: [Fedora] Fedora Reporter: Jeremy Rosengren <jeremy>
Component: kernelAssignee: Eric Sandeen <esandeen>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 16CC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:28ae179b3a0ecd47bfc3d2b0e8dc613dbe751dba
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-01-04 12:44:09 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Jeremy Rosengren 2011-12-30 03:47:34 UTC 
libreport version: 2.0.8
abrt_version:   2.0.7
cmdline:        BOOT_IMAGE=/vmlinuz-3.1.6-1.fc16.x86_64 root=/dev/mapper/vg_hippo-lv_root ro rd.md=0 rd.dm=0 rd.lvm.lv=vg_hippo/lv_swap KEYTABLE=us quiet SYSFONT=latarcyrheb-sun16 rhgb rd.luks=0 rd.lvm.lv=vg_hippo/lv_root LANG=en_US.UTF-8
comment:        I was typing in a gnome-terminal window.  I believe I had just run a "df -h" command.
kernel:         3.1.6-1.fc16.x86_64
reason:         WARNING: at fs/dcache.c:2458 prepend_path+0x18c/0x1a0()
time:           Thu 29 Dec 2011 09:46:09 PM CST

backtrace:
:WARNING: at fs/dcache.c:2458 prepend_path+0x18c/0x1a0()
:Hardware name: NY429AAR-ABA p6110y
:Root dentry has weird name <>
:Modules linked in: nfs fscache auth_rpcgss nfs_acl tcp_lp ppdev parport_pc lp parport fuse fcoe libfcoe libfc 8021q scsi_transport_fc scsi_tgt garp stp lockd llc binfmt_misc snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm iTCO_wdt r8169 snd_timer snd i2c_i801 mii iTCO_vendor_support soundcore snd_page_alloc serio_raw microcode sunrpc uinput usb_storage firewire_ohci firewire_core crc_itu_t i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
:Pid: 12032, comm: df Not tainted 3.1.6-1.fc16.x86_64 #1
:Call Trace:
: [<ffffffff8106b73f>] warn_slowpath_common+0x7f/0xc0
: [<ffffffff8106b836>] warn_slowpath_fmt+0x46/0x50
: [<ffffffff8118728c>] prepend_path+0x18c/0x1a0
: [<ffffffff8118a4a7>] sys_getcwd+0xf7/0x1e0
: [<ffffffff815dccc2>] system_call_fastpath+0x16/0x1b

smolt_data:
:
:
:General
:=================================
:UUID: 6d55702f-0546-4b2b-a4be-0ba3f6d79c35
:OS: Fedora release 16 (Verne)
:Default run level: Unknown
:Language: en_US.UTF-8
:Platform: x86_64
:BogoMIPS: 5199.96
:CPU Vendor: GenuineIntel
:CPU Model: Pentium(R) Dual-Core  CPU      E5300  @ 2.60GHz
:CPU Stepping: 10
:CPU Family: 6
:CPU Model Num: 23
:Number of CPUs: 2
:CPU Speed: 2600
:System Memory: 5961
:System Swap: 7999
:Vendor: HP-Pavilion
:System: NY429AAR-ABA p6110y 
:Form factor: Desktop
:Kernel: 3.1.6-1.fc16.x86_64
:SELinux Enabled: 0
:SELinux Policy: targeted
:SELinux Enforce: Unknown
:MythTV Remote: Unknown
:MythTV Role: Unknown
:MythTV Theme: Unknown
:MythTV Plugin: 
:MythTV Tuner: -1
:
:
:Devices
:=================================
:(32902:10518:4156:10863) pci, None, PCI/ISA, 82801IR (ICH9R) LPC Interface Controller
:(32902:10544:4156:10863) pci, i801_smbus, SERIAL, 82801I (ICH9 Family) SMBus Controller
:(4545:22545:4156:10863) pci, firewire_ohci, FIREWIRE, FW322/323
:(4332:33128:4156:10863) pci, r8169, ETHERNET, RTL8111/8168B PCI Express Gigabit Ethernet controller
:(32902:10690:4156:10863) pci, i915, VIDEO, 82G33/G31 Express Integrated Graphics Controller
:(32902:10530:4156:10863) pci, ahci, STORAGE, 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA AHCI Controller
:(32902:10560:4156:10863) pci, pcieport, PCI/PCI, 82801I (ICH9 Family) PCI Express Port 1
:(32902:10562:4156:10863) pci, pcieport, PCI/PCI, 82801I (ICH9 Family) PCI Express Port 2
:(32902:10558:4156:10863) pci, snd_hda_intel, MULTIMEDIA, 82801I (ICH9 Family) HD Audio Controller
:(32902:10564:4156:10863) pci, pcieport, PCI/PCI, 82801I (ICH9 Family) PCI Express Port 3
:(32902:10549:4156:10863) pci, uhci_hcd, USB, 82801I (ICH9 Family) USB UHCI Controller #2
:(32902:9294:4156:10863) pci, None, PCI/PCI, 82801 PCI Bridge
:(4545:1584:4545:1584) pci, None, SIMPLE, N/A
:(32902:10548:4156:10863) pci, uhci_hcd, USB, 82801I (ICH9 Family) USB UHCI Controller #1
:(32902:10551:4156:10863) pci, uhci_hcd, USB, 82801I (ICH9 Family) USB UHCI Controller #4
:(32902:10552:4156:10863) pci, uhci_hcd, USB, 82801I (ICH9 Family) USB UHCI Controller #5
:(32902:10688:4156:10863) pci, agpgart-intel, HOST/PCI, 82G33/G31/P35/P31 Express DRAM Controller
:(32902:10550:4156:10863) pci, uhci_hcd, USB, 82801I (ICH9 Family) USB UHCI Controller #3
:(32902:10553:4156:10863) pci, uhci_hcd, USB, 82801I (ICH9 Family) USB UHCI Controller #6
:(32902:10554:4156:10863) pci, ehci_hcd, USB, 82801I (ICH9 Family) USB2 EHCI Controller #1
:(32902:10556:4156:10863) pci, ehci_hcd, USB, 82801I (ICH9 Family) USB2 EHCI Controller #2
:
:
:Filesystem Information
:=================================
:device mtpt type bsize frsize blocks bfree bavail file ffree favail
:-------------------------------------------------------------------
:/dev/mapper/vg_hippo-lv_root / ext4 4096 4096 12901535 11616212 11485185 3276800 3103960 3103960
:/dev/sda2 /boot ext4 1024 1024 495844 408944 383344 128016 127744 127744
:/dev/mapper/vg_hippo-lv_home /home ext4 4096 4096 138780140 120759032 113709407 35250176 35241327 35241327
:
Comment 1 Dave Jones 2011-12-30 19:41:19 UTC 
was this after a hibernate/suspend ?
Comment 2 Jeremy Rosengren 2011-12-30 20:08:10 UTC 
I had recently resumed after a suspend, yes, maybe a few minutes after resuming.
Comment 3 Eric Sandeen 2011-12-30 23:23:44 UTC 
bug #766277 was similar but the reporter closed it.

2455         if (IS_ROOT(dentry) &&
2456             (dentry->d_name.len != 1 || dentry->d_name.name[0] != '/')) {
2457                 WARN(1, "Root dentry has weird name <%.*s>\n",
2458                      (int) dentry->d_name.len, dentry->d_name.name);
2459         }

you got ":Root dentry has weird name <>" i.e. a 0-length string, same as the other reporter.  Not sure offhand what might cause this, I'm still suspecting memory corruption via hibernate somehow.
Comment 4 Josh Boyer 2012-01-04 12:44:09 UTC 

*** This bug has been marked as a duplicate of bug 766277 ***