[PATCH openEuler-22.03-LTS-SP1] clk: mediatek: clk-mt7629-eth: Add check for mtk_alloc_clk_data

From: Jiasheng Jiang jiasheng@iscas.ac.cn

stable inclusion from stable-v5.10.201 commit 96e9544a0c4faca616b3f9f4034dcd83a14e7f22 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RG0J CVE: CVE-2023-52876

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

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[ Upstream commit 0884393c63cc9a1772f7121a6645ba7bd76feeb9 ]

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

Fixes: 3b5e748615e7 ("clk: mediatek: add clock support for MT7629 SoC") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Link: https://lore.kernel.org/r/20230912093407.21505-4-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: Li Huafei lihuafei1@huawei.com --- drivers/clk/mediatek/clk-mt7629-eth.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/clk/mediatek/clk-mt7629-eth.c b/drivers/clk/mediatek/clk-mt7629-eth.c index 88279d0ea1a76..3ab7b672f8c70 100644 --- a/drivers/clk/mediatek/clk-mt7629-eth.c +++ b/drivers/clk/mediatek/clk-mt7629-eth.c @@ -83,6 +83,8 @@ static int clk_mt7629_ethsys_init(struct platform_device *pdev) int r;

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

mtk_clk_register_gates(node, eth_clks, CLK_ETH_NR_CLK, clk_data);

@@ -105,6 +107,8 @@ static int clk_mt7629_sgmiisys_init(struct platform_device *pdev) int r;

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

mtk_clk_register_gates(node, sgmii_clks[id++], CLK_SGMII_NR_CLK, clk_data);