Re: NFSv4 WARNING: at linux/fs/inode.c:280 drop_nlink+0x23/0x44()

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On 2012-08-18 13:57 -0400, Nick Bowler wrote:
> I just noticed the following WARNING in my logs.  Looking through the
> older logs, I see quite a few of these going (at least) all the way back
> to 3.3.x days.  The process which triggers the warning always seems to
> be the same (icecat).
> 
> This is on a Linux 3.5.2 NFSv4 client machine using sec=krb5.  Other
> than the log noise, there seems to be no adverse effects.

FWIW, I'm still seeing this on 3.7.0; this time on a machine with NFSv3
mounts and sec=sys.  Still apparently caused by firefox/icecat.

> ------------[ cut here ]------------
> WARNING: at /home/nbowler/misc/linux/fs/inode.c:280 drop_nlink+0x23/0x44()
> Hardware name: System Product Name
> Modules linked in: sha1_ssse3 sha1_generic hmac aes_x86_64 aes_generic cbc cts rpcsec_gss_krb5 nfs lockd auth_rpcgss nfs_acl sunrpc ipv6 nls_iso8859_1 nls_cp437 vfat fat w83627ehf hwmon_vid snd_pcm_oss snd_mixer_oss acpi_cpufreq mperf i915 drm_kms_helper drm snd_hda_codec_hdmi snd_hda_codec_realtek arc4 ath9k mac80211 ath9k_common ath9k_hw intel_agp i2c_algo_bit intel_gtt snd_hda_intel snd_hda_codec snd_pcm snd_timer coretemp agpgart hwmon kvm_intel snd ath cfg80211 soundcore snd_page_alloc i2c_i801 r8169 mii psmouse kvm evdev video sg
> Pid: 1995, comm: icecat Not tainted 3.5.2 #46
> Call Trace:
>  [<ffffffff8102b8b3>] warn_slowpath_common+0x80/0x98
>  [<ffffffff8102b8e0>] warn_slowpath_null+0x15/0x17
>  [<ffffffff810c5195>] drop_nlink+0x23/0x44
>  [<ffffffffa03aa2a1>] nfs_dentry_iput+0x35/0x4d [nfs]
>  [<ffffffff810c25d0>] dentry_kill+0x149/0x171
>  [<ffffffff810c2850>] dput+0xed/0xfe
>  [<ffffffff810b2ff4>] fput+0x1a5/0x1bd
>  [<ffffffff810b0454>] filp_close+0x6b/0x76
>  [<ffffffff810b04f1>] sys_close+0x92/0xd4
>  [<ffffffff8131efa2>] system_call_fastpath+0x16/0x1b
> ---[ end trace b160c7dc08b4910c ]---
> 
> Please let me know if you need any more info,
-- 
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)
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