Re: [PATCH 1/2] ftrace: Fix NULL pointer dereference in t_probe_next()

[Steven Rostedt]

On Thu,  4 Jul 2019 20:04:41 +0530
"Naveen N. Rao" <naveen.n.rao@xxxxxxxxxxxxxxxxxx> wrote:


>  kernel/trace/ftrace.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index 7b037295a1f1..0791eafb693d 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -3093,6 +3093,10 @@ t_probe_next(struct seq_file *m, loff_t *pos)
>  		hnd = &iter->probe_entry->hlist;
>  
>  	hash = iter->probe->ops.func_hash->filter_hash;
> +
> +	if (!hash)
> +		return NULL;
> +
>  	size = 1 << hash->size_bits;
>  
>   retry:

OK, I added this, but I'm also adding this on top:

-- Steve