[PATCH 01/10] mm/damon/core: initialize ->esz_bp from damos_quota_init_priv()

SeongJae Park
2024-05-03T18:03:22Z

damos_quota_init_priv() function should initialize all private fields of
struct damos_quota. However, it is not initializing ->esz_bp field.
This could result in use of uninitialized variable from
damon_feed_loop_next_input() function. There is no such issue at the
moment because every caller of the function is passing damos_quota
object that already having the field zero value. But we cannot
guarantee the future, and the function is not doing what it is
promising. A bug is a bug. This fix is for preventing possible future
issues.

Fixes: 9294a037c015 ("mm/damon/core: implement goal-oriented feedback-driven quota auto-tuning")
Signed-off-by: SeongJae Park <sj@kernel.org>
---
mm/damon/core.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index 172095e68c5d..6392f1cc97a3 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -346,6 +346,7 @@ static struct damos_quota *damos_quota_init(struct damos_quota *quota)
quota->charged_from = 0;
quota->charge_target_from = NULL;
quota->charge_addr_from = 0;
+ quota->esz_bp = 0;
return quota;
}

--
2.39.2