[to-be-updated] mm-damon-stat-deallocate-damon_call-failure-leaking-damon_ctx.patch removed from -mm tree

[to-be-updated] mm-damon-stat-deallocate-damon_call-failure-leaking-damon_ctx.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/damon/stat: deallocate damon_call() failure leaking damon_ctx
has been removed from the -mm tree.  Its filename was
     mm-damon-stat-deallocate-damon_call-failure-leaking-damon_ctx.patch

This patch was dropped because an updated version will be issued

------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/stat: deallocate damon_call() failure leaking damon_ctx
Date: Wed, 1 Apr 2026 18:04:55 -0700

DAMON_STAT does not deallocate its dynamically allocated damon_ctx object
when damon_call() is failed.  As a result, the memory is leaked.  Check
the failure and deallocate the damon_ctx object.

The issue was discovered [1] by sashiko.


Link: https://lkml.kernel.org/r/20260402010457.66860-1-sj@kernel.org
Link: https://lore.kernel.org/20260401012428.86694-1-sj@kernel.org [1]
Fixes: 405f61996d9d ("mm/damon/stat: use damon_call() repeat mode instead of damon_callback")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> # 6.17.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/stat.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/mm/damon/stat.c~mm-damon-stat-deallocate-damon_call-failure-leaking-damon_ctx
+++ a/mm/damon/stat.c
@@ -254,7 +254,12 @@ static int damon_stat_start(void)
 
 	damon_stat_last_refresh_jiffies = jiffies;
 	call_control.data = damon_stat_context;
-	return damon_call(damon_stat_context, &call_control);
+	err = damon_call(damon_stat_context, &call_control);
+	if (err) {
+		damon_destroy_ctx(damon_stat_context);
+		damon_stat_context = NULL;
+	}
+	return err;
 }
 
 static void damon_stat_stop(void)
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-sysfs-dealloc-repeat_call_control-if-damon_call-fails.patch
mm-damon-core-fix-damon_call-vs-kdamond_fn-exit-race.patch
mm-damon-core-fix-damos_walk-vs-kdamond_fn-exit-race.patch
mm-damon-core-validate-damos_quota_goal-nid-for-node_mem_usedfree_bp.patch
mm-damon-core-validate-damos_quota_goal-nid-for-node_memcg_usedfree_bp.patch
mm-damon-core-use-time_in_range_open-for-damos-quota-window-start.patch
docs-admin-guide-mm-damon-reclaim-warn-commit_inputs-vs-param-updates-race.patch
docs-admin-guide-mm-damon-lru_sort-warn-commit_inputs-vs-param-updates-race.patch