5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
[ Upstream commit 0d6e24b422a2166a9297a8286ff2e6ab9a5e8cd3 ]
Add the check for the return value of mtk_alloc_clk_data() in order to
avoid NULL pointer dereference.
Fixes: e9862118272a ("clk: mediatek: Add MT2701 clock support")
Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230901024658.23405-1-jiasheng@xxxxxxxxxxx
Reviewed-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
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-mt2701.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/clk/mediatek/clk-mt2701.c b/drivers/clk/mediatek/clk-mt2701.c
index 695be0f774270..c67cd73aca171 100644
--- a/drivers/clk/mediatek/clk-mt2701.c
+++ b/drivers/clk/mediatek/clk-mt2701.c
@@ -675,6 +675,8 @@ static int mtk_topckgen_init(struct platform_device *pdev)
return PTR_ERR(base);
clk_data = mtk_alloc_clk_data(CLK_TOP_NR);
+ if (!clk_data)
+ return -ENOMEM;
mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
clk_data);
@@ -742,6 +744,8 @@ static void __init mtk_infrasys_init_early(struct device_node *node)
if (!infra_clk_data) {
infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR);
+ if (!infra_clk_data)
+ return;
for (i = 0; i < CLK_INFRA_NR; i++)
infra_clk_data->clks[i] = ERR_PTR(-EPROBE_DEFER);
@@ -768,6 +772,8 @@ static int mtk_infrasys_init(struct platform_device *pdev)
if (!infra_clk_data) {
infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR);
+ if (!infra_clk_data)
+ return -ENOMEM;
} else {
for (i = 0; i < CLK_INFRA_NR; i++) {
if (infra_clk_data->clks[i] == ERR_PTR(-EPROBE_DEFER))
@@ -896,6 +902,8 @@ static int mtk_pericfg_init(struct platform_device *pdev)
return PTR_ERR(base);
clk_data = mtk_alloc_clk_data(CLK_PERI_NR);
+ if (!clk_data)
+ return -ENOMEM;
mtk_clk_register_gates(node, peri_clks, ARRAY_SIZE(peri_clks),
clk_data);
--
2.42.0
