[PATCH openEuler-22.03-LTS-SP1] clk: mediatek: clk-mt6765: Add check for mtk_alloc_clk_data

From: Jiasheng Jiang jiasheng@iscas.ac.cn

stable inclusion from stable-v5.10.201 commit 2617aa8ceaf30e41d3eb7f5fef3445542bef193a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RG0H CVE: CVE-2023-52870

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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[ Upstream commit b82681042724924ae3ba0f2f2eeec217fa31e830 ]

Add the check for the return value of mtk_alloc_clk_data() in order to avoid NULL pointer dereference.

Fixes: 1aca9939bf72 ("clk: mediatek: Add MT6765 clock support") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Link: https://lore.kernel.org/r/20230912093407.21505-1-jiasheng@iscas.ac.cn Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: sanglipeng sanglipeng1@jd.com Signed-off-by: Zheng Zucheng zhengzucheng@huawei.com --- drivers/clk/mediatek/clk-mt6765.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt6765.c b/drivers/clk/mediatek/clk-mt6765.c index d77ea5aff292..17352342b698 100644 --- a/drivers/clk/mediatek/clk-mt6765.c +++ b/drivers/clk/mediatek/clk-mt6765.c @@ -785,6 +785,8 @@ static int clk_mt6765_apmixed_probe(struct platform_device *pdev) }

clk_data = mtk_alloc_clk_data(CLK_APMIXED_NR_CLK); + if (!clk_data) + return -ENOMEM;

mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);

@@ -820,6 +822,8 @@ static int clk_mt6765_top_probe(struct platform_device *pdev) }

clk_data = mtk_alloc_clk_data(CLK_TOP_NR_CLK); + if (!clk_data) + return -ENOMEM;

mtk_clk_register_fixed_clks(fixed_clks, ARRAY_SIZE(fixed_clks), clk_data); @@ -860,6 +864,8 @@ static int clk_mt6765_ifr_probe(struct platform_device *pdev) }

clk_data = mtk_alloc_clk_data(CLK_IFR_NR_CLK); + if (!clk_data) + return -ENOMEM;

mtk_clk_register_gates(node, ifr_clks, ARRAY_SIZE(ifr_clks), clk_data);