summaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorTom Zanussi <zanussi@kernel.org>2020-02-14 16:56:40 -0600
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2020-02-20 16:24:17 -0500
commit3843083772dc2afde790a6d7160658b00a808da1 (patch)
treeca972426f71e8b20539a41afb22ef3be5ed3d753 /kernel
parent1d9d4c90194a8c3b2f7da9f4bf3f8ba2ed810656 (diff)
downloadlinux-3843083772dc2afde790a6d7160658b00a808da1.tar.gz
linux-3843083772dc2afde790a6d7160658b00a808da1.tar.bz2
linux-3843083772dc2afde790a6d7160658b00a808da1.zip
tracing: Check that number of vals matches number of synth event fields
Commit 7276531d4036('tracing: Consolidate trace() functions') inadvertently dropped the synth_event_trace() and synth_event_trace_array() checks that verify the number of values passed in matches the number of fields in the synthetic event being traced, so add them back. Link: http://lkml.kernel.org/r/32819cac708714693669e0dfe10fe9d935e94a16.1581720155.git.zanussi@kernel.org Signed-off-by: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_events_hist.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 6a380fb83864..45622194a34d 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1878,6 +1878,11 @@ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...)
return ret;
}
+ if (n_vals != state.event->n_fields) {
+ ret = -EINVAL;
+ goto out;
+ }
+
va_start(args, n_vals);
for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) {
u64 val;
@@ -1914,7 +1919,7 @@ int synth_event_trace(struct trace_event_file *file, unsigned int n_vals, ...)
}
}
va_end(args);
-
+out:
__synth_event_trace_end(&state);
return ret;
@@ -1953,6 +1958,11 @@ int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
return ret;
}
+ if (n_vals != state.event->n_fields) {
+ ret = -EINVAL;
+ goto out;
+ }
+
for (i = 0, n_u64 = 0; i < state.event->n_fields; i++) {
if (state.event->fields[i]->is_string) {
char *str_val = (char *)(long)vals[i];
@@ -1984,7 +1994,7 @@ int synth_event_trace_array(struct trace_event_file *file, u64 *vals,
n_u64++;
}
}
-
+out:
__synth_event_trace_end(&state);
return ret;