From: Josh Law <objecting@objecting.org>
To: sj@kernel.org, akpm@linux-foundation.org
Cc: damon@lists.linux.dev, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, Josh Law <objecting@objecting.org>
Subject: [PATCH 1/4] mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure
Date: Thu, 19 Mar 2026 15:57:39 +0000 [thread overview]
Message-ID: <20260319155742.186627-2-objecting@objecting.org> (raw)
In-Reply-To: <20260319155742.186627-1-objecting@objecting.org>
When damon_sysfs_new_test_ctx() fails in damon_sysfs_commit_input(),
param_ctx is leaked because the early return skips the cleanup at the
out label. Destroy param_ctx before returning.
Signed-off-by: Josh Law <objecting@objecting.org>
---
mm/damon/sysfs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 576d1ddd736b..b573b9d60784 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1524,8 +1524,10 @@ static int damon_sysfs_commit_input(void *data)
if (IS_ERR(param_ctx))
return PTR_ERR(param_ctx);
test_ctx = damon_sysfs_new_test_ctx(kdamond->damon_ctx);
- if (!test_ctx)
+ if (!test_ctx) {
+ damon_destroy_ctx(param_ctx);
return -ENOMEM;
+ }
err = damon_commit_ctx(test_ctx, param_ctx);
if (err)
goto out;
--
2.34.1
next prev parent reply other threads:[~2026-03-19 15:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-19 15:57 [PATCH 0/4] mm/damon/sysfs: fix resource leak and NULL pointer dereferences Josh Law
2026-03-19 15:57 ` Josh Law [this message]
2026-03-20 2:00 ` [PATCH 1/4] mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx() failure SeongJae Park
2026-03-19 15:57 ` [PATCH 2/4] mm/damon/sysfs: check contexts->nr before clear_schemes_tried_regions Josh Law
2026-03-20 2:13 ` SeongJae Park
2026-03-20 7:06 ` Josh Law
2026-03-20 14:47 ` SeongJae Park
2026-03-20 15:14 ` Josh Law
2026-03-20 15:51 ` SeongJae Park
2026-03-20 15:56 ` Josh Law
2026-03-19 15:57 ` [PATCH 3/4] mm/damon/sysfs: check contexts->nr in update_schemes_tried_regions Josh Law
2026-03-20 2:15 ` SeongJae Park
2026-03-19 15:57 ` [PATCH 4/4] mm/damon/sysfs: check contexts->nr in repeat_call_fn Josh Law
2026-03-20 2:06 ` SeongJae Park
2026-03-19 19:24 ` [PATCH 0/4] mm/damon/sysfs: fix resource leak and NULL pointer dereferences Josh Law
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