4.19-stable review patch. If anyone has any objections, please let me know.
------------------ From: zhangyi (F) <[email protected]> commit e7f0c424d0806b05d6f47be9f202b037eb701707 upstream. Commit d716ff71dd12 ("tracing: Remove taking of trace_types_lock in pipe files") use the current tracer instead of the copy in tracing_open_pipe(), but it forget to remove the freeing sentence in the error path. There's an error path that can call kfree(iter->trace) after the iter->trace was assigned to tr->current_trace, which would be bad to free. Link: http://lkml.kernel.org/r/[email protected] Cc: [email protected] Fixes: d716ff71dd12 ("tracing: Remove taking of trace_types_lock in pipe files") Signed-off-by: zhangyi (F) <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- kernel/trace/trace.c | 1 - 1 file changed, 1 deletion(-) --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -5606,7 +5606,6 @@ out: return ret; fail: - kfree(iter->trace); kfree(iter); __trace_array_put(tr); mutex_unlock(&trace_types_lock);
