| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 3.18 45/98] perf machine: Fix __machine__findnew_thread() error path | Date | Thu, 25 Oct 2018 10:18:00 -0400 |
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From: Namhyung Kim <namhyung@kernel.org>
[ Upstream commit 260d819e3abdbdaa2b88fb983d1314f1b263f9e2 ]
When thread__init_map_groups() fails, a new thread should be removed from the rbtree since it's gonna be freed. Also update last match cache only if the function succeeded.
Reported-by: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1420763892-15535-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- tools/perf/util/machine.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 34fc7c8672e4..84238a10c34b 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -389,7 +389,6 @@ static struct thread *__machine__findnew_thread(struct machine *machine, if (th != NULL) { rb_link_node(&th->rb_node, parent, p); rb_insert_color(&th->rb_node, &machine->threads); - machine->last_match = th; /* * We have to initialize map_groups separately @@ -400,9 +399,12 @@ static struct thread *__machine__findnew_thread(struct machine *machine, * leader and that would screwed the rb tree. */ if (thread__init_map_groups(th, machine)) { + rb_erase(&th->rb_node, &machine->threads); thread__delete(th); return NULL; } + + machine->last_match = th; } return th; -- 2.17.1
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