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perf tools: Always bail out when config_attr function fails 

Not sure why we allowed the fail state, but it's wrong.  Wrong type for
'name' term can cause segfault, and there's probably more fun hidden.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1429729824-13932-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2015-04-22 21:10:18 +02:00 committed by Arnaldo Carvalho de Melo
parent 6297d42372
commit c056ba6a17
1 changed files with 11 additions and 4 deletions
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15
tools/perf/util/parse-events.c
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@ -549,6 +549,12 @@ do { \
} while (0) } while (0)
switch (term->type_term) { switch (term->type_term) {
case PARSE_EVENTS__TERM_TYPE_USER:
/*
* Always succeed for sysfs terms, as we dont know
* at this point what type they need to have.
*/
return 0;
case PARSE_EVENTS__TERM_TYPE_CONFIG: case PARSE_EVENTS__TERM_TYPE_CONFIG:
CHECK_TYPE_VAL(NUM); CHECK_TYPE_VAL(NUM);
attr->config = term->val.num; attr->config = term->val.num;
@ -583,12 +589,12 @@ do { \
} }
static int config_attr(struct perf_event_attr *attr, static int config_attr(struct perf_event_attr *attr,
struct list_head *head, int fail) struct list_head *head)
{ {
struct parse_events_term *term; struct parse_events_term *term;
list_for_each_entry(term, head, list) list_for_each_entry(term, head, list)
if (config_term(attr, term) && fail) if (config_term(attr, term))
return -EINVAL; return -EINVAL;
return 0; return 0;
@ -605,7 +611,7 @@ int parse_events_add_numeric(struct list_head *list, int *idx,
attr.config = config; attr.config = config;
if (head_config && if (head_config &&
config_attr(&attr, head_config, 1)) config_attr(&attr, head_config))
return -EINVAL; return -EINVAL;
return add_event(list, idx, &attr, NULL); return add_event(list, idx, &attr, NULL);
@ -659,7 +665,8 @@ int parse_events_add_pmu(struct list_head *list, int *idx,
* Configure hardcoded terms first, no need to check * Configure hardcoded terms first, no need to check
* return value when called with fail == 0 ;) * return value when called with fail == 0 ;)
*/ */
config_attr(&attr, head_config, 0); if (config_attr(&attr, head_config))
return -EINVAL;
if (perf_pmu__config(pmu, &attr, head_config)) if (perf_pmu__config(pmu, &attr, head_config))
return -EINVAL; return -EINVAL;