linux-kernel - Re: WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop

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Date:	Thu, 26 Nov 2015 17:26:14 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Vegard Nossum <vegard.nossum@...cle.com>
Cc:	Richard Weinberger <richard@....at>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop_nlink+0x4b/0x50()

Vegard Nossum <vegard.nossum@...cle.com> writes:

> On 11/25/2015 10:54 PM, OGAWA Hirofumi wrote:
>> Vegard Nossum <vegard.nossum@...cle.com> writes:
>>
>>> On 11/23/2015 11:21 PM, Richard Weinberger wrote:
>>>> Am 23.11.2015 um 08:55 schrieb Vegard Nossum:
>>>>> With the attached vfat disk image (fuzzed), I get the following WARNING:
>>>>>
>>>>> WARNING: CPU: 0 PID: 913 at fs/inode.c:275 drop_nlink+0x4b/0x50()
>
> [...]
>
>>
>> Can you try this one?
>>
>
> That seems to fix the problem here, thanks!
>
> The last potential issue I'm seeing (completely unrelated to your patch) 
> is this:
>
> [  340.610000] VFS: Lookup of '1' in vfat loop0 would have caused loop
> [  354.360000] d_splice_alias: 1104 callbacks suppressed
> [  354.360000] VFS: Lookup of '1' in vfat loop0 would have caused loop
>
> Is that worth investigating closer?

It looks like corruption detected with ratelimited printk (at vfs
level. dir is hardlink of ancestor). IOW, it looks like intended
behavior.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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