6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ Upstream commit bd54ccc0f147019dac38e7841876a7415459b875 ]
The mtk_clk_register_pll_ops() currently frees the "pll" parameter.
The function has two callers, mtk_clk_register_pll() and
mtk_clk_register_pllfh(). The first one, the _pll() function relies on
the free, but for the second _pllfh() function it causes a double free
bug.
Really the frees should be done in the caller because that's where
the allocation is.
Fixes: d7964de8a8ea ("clk: mediatek: Add new clock driver to handle FHCTL hardware")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Link: https://lore.kernel.org/r/cd7fa365-28cc-4c34-ac64-6da57c98baa6@moroto.mountain
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/clk/mediatek/clk-pll.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c
index a4eca5fd539c8..513ab6b1b3229 100644
--- a/drivers/clk/mediatek/clk-pll.c
+++ b/drivers/clk/mediatek/clk-pll.c
@@ -321,10 +321,8 @@ struct clk_hw *mtk_clk_register_pll_ops(struct mtk_clk_pll *pll,
ret = clk_hw_register(NULL, &pll->hw);
- if (ret) {
- kfree(pll);
+ if (ret)
return ERR_PTR(ret);
- }
return &pll->hw;
}
@@ -340,6 +338,8 @@ struct clk_hw *mtk_clk_register_pll(const struct mtk_pll_data *data,
return ERR_PTR(-ENOMEM);
hw = mtk_clk_register_pll_ops(pll, data, base, &mtk_pll_ops);
+ if (IS_ERR(hw))
+ kfree(pll);
return hw;
}
--
2.42.0
