Re: [PATCH] ntb: fix possible NULL dereference

["Jiang, Dave" <dave.jiang@intel.com>]

On Thu, 2016-03-10 at 17:51 +0530, Sudip Mukherjee wrote:
> kmalloc can fail and we should check for NULL before using the
> pointer
> returned by kmalloc.
> 
> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Acked-by: Dave Jiang <dave.jiang@intel.com>

Thanks!

> ---
>  drivers/ntb/test/ntb_perf.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/ntb/test/ntb_perf.c
> b/drivers/ntb/test/ntb_perf.c
> index c8a37ba..b21e647 100644
> --- a/drivers/ntb/test/ntb_perf.c
> +++ b/drivers/ntb/test/ntb_perf.c
> @@ -541,6 +541,8 @@ static ssize_t debugfs_run_read(struct file
> *filp, char __user *ubuf,
>  		return 0;
>  
>  	buf = kmalloc(64, GFP_KERNEL);
> +	if (!buf)
> +		return -ENOMEM;
>  	out_offset = snprintf(buf, 64, "%d\n", perf->run);
>  	ret = simple_read_from_buffer(ubuf, count, offp, buf,
> out_offset);
>  	kfree(buf);