linux-kernel - Re: [PATCH 1/1] nilfs2: fix potential memory overrun on inode

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Date:	Sat, 21 Feb 2015 11:37:03 +0900 (JST)
From:	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-nilfs@...r.kernel.org,
	Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Matt Turner <mattst88@...il.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [PATCH 1/1] nilfs2: fix potential memory overrun on inode

On Fri, 20 Feb 2015 18:00:55 -0800, Andrew Morton wrote:
> On Sat, 21 Feb 2015 10:13:28 +0900 (JST) Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp> wrote:
> 
>> I've got a warning from 0day kernel testing backend:
>> 
>>     fs/nilfs2/btree.c: In function 'nilfs_btree_root_broken':
>> >> fs/nilfs2/btree.c:394:3: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'ino_t' [-Wformat=]
>>        pr_crit("NILFS: bad btree root (inode number=%lu): level = %d, 
>> flags = 0x%x, nchildren = %d\n",
>>        ^
>> 
>> This is output for s390 arch since ino_t doesn't mean "unsigned long"
>> in s390.
> 
> alpha uses uint for ino_t as well.
> 
> It seems a bit pointless - neither arch uses ino_t in ./arch/ code.  I
> suspect both could switch to ulong, which would make the world a
> slightly better place.

I entirely agree.

Regards,
Ryusuke Konishi
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