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| author | Tom Zanussi <zanussi@kernel.org> | 2020-02-14 16:56:40 -0600 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2020-02-20 16:24:17 -0500 |
| commit | 3843083772dc2afde790a6d7160658b00a808da1 (patch) | |
| tree | ca972426f71e8b20539a41afb22ef3be5ed3d753 /kernel | |
| parent | 1d9d4c90194a8c3b2f7da9f4bf3f8ba2ed810656 (diff) | |
| download | lwn-3843083772dc2afde790a6d7160658b00a808da1.tar.gz lwn-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.c | 14 |
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; |