From 9f58a159d022c8f2533a27708aa267adf4f0e3ce Mon Sep 17 00:00:00 2001 From: Tom Zanussi Date: Tue, 24 Mar 2009 02:14:42 -0500 Subject: [PATCH] tracing/filters: disallow integer values for string filters and vice versa Impact: fix filter use boundary condition / crash Make sure filters for string fields don't use integer values and vice versa. Getting it wrong can crash the system or produce bogus results. Signed-off-by: Tom Zanussi Cc: Steven Rostedt Cc: =?ISO-8859-1?Q?Fr=E9d=E9ric?= Weisbecker LKML-Reference: <1237878882.8339.61.camel@charm-linux> Signed-off-by: Ingo Molnar --- kernel/trace/trace_events_filter.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 9fca8bb1c06b..026be412f356 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -237,9 +237,14 @@ int filter_add_pred(struct ftrace_event_call *call, struct filter_pred *pred) pred->offset = field->offset; if (is_string_field(field->type)) { + if (!pred->str_val) + return -EINVAL; pred->fn = filter_pred_string; pred->str_len = field->size; return __filter_add_pred(call, pred); + } else { + if (pred->str_val) + return -EINVAL; } switch (field->size) { -- 2.47.2