Thread (38 messages) flat view 38 messages, 4 authors, 2026-08-04
COLD51d REVIEWED: 1 (0M)

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[PATCH 04/32] clk: mediatek: mt8135: fix memory leak on module removal

From: Akari Tsuyukusa <hidden>
Date: 2026-08-03 14:17:55
Also in: linux-clk, linux-mediatek, lkml, netdev, stable
Subsystem: common clk framework, the rest · Maintainers: Stephen Boyd, Brian Masney, Jerome Brunet, Linus Torvalds

clk_mt8135_apmixed_probe() in clk-mt8135-apmixedsys.c does not call
platform_set_drvdata(), but clk_mt8135_apmixed_remove() callback calls
platform_get_drvdata().
This results in platform_get_drvdata() returning NULL,
which leads to calling kfree(NULL) in mtk_free_clk_data(NULL).
This leaves clk_data unreleased, causing a memory leak.

Fix this by calling platform_set_drvdata() during probe.

Fixes: 54b7026f011e ("clk: mediatek: mt8135-apmixedsys: Convert to platform_driver and module")
Cc: stable@vger.kernel.org
Signed-off-by: Akari Tsuyukusa <redacted>
Reviewed-by: Brian Masney <redacted>
---
 drivers/clk/mediatek/clk-mt8135-apmixedsys.c | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/drivers/clk/mediatek/clk-mt8135-apmixedsys.c b/drivers/clk/mediatek/clk-mt8135-apmixedsys.c
index 19e4ee489ec3..e3b7dc13b458 100644
--- a/drivers/clk/mediatek/clk-mt8135-apmixedsys.c
+++ b/drivers/clk/mediatek/clk-mt8135-apmixedsys.c
@@ -66,6 +66,8 @@ static int clk_mt8135_apmixed_probe(struct platform_device *pdev)
 	if (ret)
 		goto unregister_plls;
 
+	platform_set_drvdata(pdev, clk_data);
+
 	return 0;
 
 unregister_plls:
-- 
2.55.0

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