From: Steven Rostedt (Google) Date: Tue, 31 Jan 2023 14:52:37 +0000 (-0500) Subject: tracing: Fix trace_event_raw_event_synth() if else statement X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9971c3f944489ff7aacb9d25e0cde841a5f6018a;p=linux.git tracing: Fix trace_event_raw_event_synth() if else statement The test to check if the field is a stack is to be done if it is not a string. But the code had: } if (event->fields[i]->is_stack) { and not } else if (event->fields[i]->is_stack) { which would cause it to always be tested. Worse yet, this also included an "else" statement that was only to be called if the field was not a string and a stack, but this code allows it to be called if it was a string (and not a stack). Also fixed some whitespace issues. Link: https://lore.kernel.org/all/202301302110.mEtNwkBD-lkp@intel.com/ Link: https://lore.kernel.org/linux-trace-kernel/20230131095237.63e3ca8d@gandalf.local.home Cc: Tom Zanussi Fixes: 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") Reported-by: kernel test robot Signed-off-by: Steven Rostedt (Google) Acked-by: Masami Hiramatsu (Google) --- diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c index adb630633f319..306c89e0ce55e 100644 --- a/kernel/trace/trace_events_synth.c +++ b/kernel/trace/trace_events_synth.c @@ -564,8 +564,8 @@ static notrace void trace_event_raw_event_synth(void *__data, event->fields[i]->is_dynamic, data_size, &n_u64); data_size += len; /* only dynamic string increments */ - } if (event->fields[i]->is_stack) { - long *stack = (long *)(long)var_ref_vals[val_idx]; + } else if (event->fields[i]->is_stack) { + long *stack = (long *)(long)var_ref_vals[val_idx]; len = trace_stack(entry, event, stack, data_size, &n_u64);