* [PATCH] tracing: Fix a potential NULL dereference
@ 2018-03-23 11:37 Dan Carpenter
2018-03-23 13:23 ` Tom Zanussi
0 siblings, 1 reply; 3+ messages in thread
From: Dan Carpenter @ 2018-03-23 11:37 UTC (permalink / raw)
To: Steven Rostedt, Tom Zanussi; +Cc: Ingo Molnar, linux-kernel, kernel-janitors
We forgot to set the error code on this path so we return ERR_PTR(0)
which is NULL. It results in a NULL dereference in the caller.
Fixes: 100719dcef44 ("tracing: Add simple expression support to hist triggers")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 4f027642ceef..a02bc09d765a 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -2776,6 +2776,7 @@ static struct hist_field *parse_expr(struct hist_trigger_data *hist_data,
expr->fn = hist_field_plus;
break;
default:
+ ret = -EINVAL;
goto free;
}
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] tracing: Fix a potential NULL dereference
2018-03-23 11:37 [PATCH] tracing: Fix a potential NULL dereference Dan Carpenter
@ 2018-03-23 13:23 ` Tom Zanussi
2018-03-23 15:14 ` Steven Rostedt
0 siblings, 1 reply; 3+ messages in thread
From: Tom Zanussi @ 2018-03-23 13:23 UTC (permalink / raw)
To: Dan Carpenter; +Cc: Steven Rostedt, Ingo Molnar, linux-kernel, kernel-janitors
Hi Dan,
On Fri, 2018-03-23 at 14:37 +0300, Dan Carpenter wrote:
> We forgot to set the error code on this path so we return ERR_PTR(0)
> which is NULL. It results in a NULL dereference in the caller.
>
> Fixes: 100719dcef44 ("tracing: Add simple expression support to hist triggers")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
> index 4f027642ceef..a02bc09d765a 100644
> --- a/kernel/trace/trace_events_hist.c
> +++ b/kernel/trace/trace_events_hist.c
> @@ -2776,6 +2776,7 @@ static struct hist_field *parse_expr(struct hist_trigger_data *hist_data,
> expr->fn = hist_field_plus;
> break;
> default:
> + ret = -EINVAL;
> goto free;
> }
>
Acked-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Thanks for catching this!
Tom
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] tracing: Fix a potential NULL dereference
2018-03-23 13:23 ` Tom Zanussi
@ 2018-03-23 15:14 ` Steven Rostedt
0 siblings, 0 replies; 3+ messages in thread
From: Steven Rostedt @ 2018-03-23 15:14 UTC (permalink / raw)
To: Tom Zanussi; +Cc: Dan Carpenter, Ingo Molnar, linux-kernel, kernel-janitors
On Fri, 23 Mar 2018 08:23:13 -0500
Tom Zanussi <tom.zanussi@linux.intel.com> wrote:
> Acked-by: Tom Zanussi <tom.zanussi@linux.intel.com>
>
> Thanks for catching this!
Thanks Dan, applied.
-- Steve
^ permalink raw reply [flat|nested] 3+ messages in thread
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2018-03-23 13:23 ` Tom Zanussi
2018-03-23 15:14 ` Steven Rostedt
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