perf sched: Fix thread reference leaks in timehist_get_thread()

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timehist_get_thread() acquires a thread reference via
machine__findnew_thread() and an idle thread reference via
get_idle_thread() (which calls thread__get()).  Two error paths in
the idle_hist block return NULL without releasing these references:

 - When get_idle_thread() fails, the thread reference leaks.
 - When thread__priv(idle) returns NULL, both idle and thread leak.

Additionally, the idle thread reference acquired on the success path
is never released, leaking a reference on every sample when
--idle-hist is active.

Add thread__put() calls on both error paths and release the idle
reference after use on the success path.

Fixes: 5d8f17fb5822 ("perf sched timehist: Add -I/--idle-hist option")
Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Assisted-by: Claude:claude-opus-4.6
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Arnaldo Carvalho de Melo 2026-06-04 18:18:05 -03:00

parent 1e7921d722

commit fa20c1f8f4

1 changed files with 7 additions and 1 deletions

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tools/perf/builtin-sched.c

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