linux-kernel - Re: fs/ntfs/super.c:2717:1-14: alloc with no test

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Message-ID: <20120826093113.GA11809@localhost>
Date:	Sun, 26 Aug 2012 17:31:13 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	"devendra.aaru" <devendra.aaru@...il.com>
Cc:	Anton Altaparmakov <anton@...era.com>,
	kernel-janitors@...r.kernel.org,
	linux-ntfs-dev@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: fs/ntfs/super.c:2717:1-14: alloc with no test

On Sun, Aug 26, 2012 at 02:42:12PM +0530, devendra.aaru wrote:
> On Sun, Aug 26, 2012 at 2:34 PM, Fengguang Wu <fengguang.wu@...el.com> wrote:
> >
> > Hi Anton,
> >
> > FYI, coccinelle warns about
> >
> > fs/ntfs/super.c:2717:1-14: alloc with no test, possible model on line 2718
> >
> > vim +2717 fs/ntfs/super.c
> >   2714          sb->s_flags |= MS_RDONLY;
> >   2715  #endif /* ! NTFS_RW */
> >   2716          /* Allocate a new ntfs_volume and place it in sb->s_fs_info. */
> >> 2717          sb->s_fs_info = kmalloc(sizeof(ntfs_volume), GFP_NOFS);
> 
> That's i think a false alarm.
> 
> >   2718          vol = NTFS_SB(sb);
> 
> The NTFS_SB(buf) {
>       buf->s_fs_info;
>  }
> 
> so we are validating the allocated pointer s_fs_info.

Yes, it is. Sorry for the noise!

Thanks,
Fengguang

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