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commit b5884002dc39fac45941ec408cd20d7a04f7b9c7
parent f5d582777bcb1c7ff19a5a2343f66ea01de401c6
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed, 12 Dec 2018 18:15:29 -0800

Merge tag 'trace-v4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "While running various ftrace tests on new development code, the
  kmemleak detector found some allocations that were not freed
  correctly.

  This fixes a couple of leaks in the event trigger code as well as in
  adding function trace filters in trace instances"

* tag 'trace-v4.20-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix memory leak of instance function hash filters
  tracing: Fix memory leak in set_trigger_filter()
  tracing: Fix memory leak in create_filter()

Diffstat:
Mkernel/trace/ftrace.c | 1+
Mkernel/trace/trace_events_filter.c | 5++++-
Mkernel/trace/trace_events_trigger.c | 6++++--
3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c @@ -5460,6 +5460,7 @@ void ftrace_destroy_filter_files(struct ftrace_ops *ops) if (ops->flags & FTRACE_OPS_FL_ENABLED) ftrace_shutdown(ops, 0); ops->flags |= FTRACE_OPS_FL_DELETED; + ftrace_free_filter(ops); mutex_unlock(&ftrace_lock); } diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c @@ -570,11 +570,13 @@ predicate_parse(const char *str, int nr_parens, int nr_preds, } } + kfree(op_stack); + kfree(inverts); return prog; out_free: kfree(op_stack); - kfree(prog_stack); kfree(inverts); + kfree(prog_stack); return ERR_PTR(ret); } @@ -1718,6 +1720,7 @@ static int create_filter(struct trace_event_call *call, err = process_preds(call, filter_string, *filterp, pe); if (err && set_str) append_filter_err(pe, *filterp); + create_filter_finish(pe); return err; } diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c @@ -732,8 +732,10 @@ int set_trigger_filter(char *filter_str, /* The filter is for the 'trigger' event, not the triggered event */ ret = create_event_filter(file->event_call, filter_str, false, &filter); - if (ret) - goto out; + /* + * If create_event_filter() fails, filter still needs to be freed. + * Which the calling code will do with data->filter. + */ assign: tmp = rcu_access_pointer(data->filter);