lkml.org 
[lkml]   [2013]   [Oct]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] befs: fix return value check in befs_iget()
From
On Mon, Oct 28, 2013 at 7:00 PM, Wei Yongjun <weiyj.lk@gmail.com> wrote:
> From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
>
> In case of error, the function iget_locked() returns NULL pointer
> not ERR_PTR(). The IS_ERR() test in the return value check should
> be replaced with NULL test.
>
> Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>

Good catch, thanks!

Acked-by: Kees Cook <keescook@chromium.org>

As an aside, Dan, how hard would this kind of mismatch be to detect with smatch?

-Kees

> ---
> fs/befs/linuxvfs.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
> index e9c75e2..d714dda 100644
> --- a/fs/befs/linuxvfs.c
> +++ b/fs/befs/linuxvfs.c
> @@ -319,8 +319,8 @@ static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
> befs_debug(sb, "---> befs_read_inode() " "inode = %lu", ino);
>
> inode = iget_locked(sb, ino);
> - if (IS_ERR(inode))
> - return inode;
> + if (!inode)
> + return ERR_PTR(-ENOMEM);
> if (!(inode->i_state & I_NEW))
> return inode;
>
>



--
Kees Cook
Chrome OS Security


\
 
 \ /
  Last update: 2013-10-30 19:21    [W:0.035 / U:6.808 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site