Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions).
As found with Coccinelle[1], add __counted_by for struct clk_hw_onecell_data. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Michael Turquette <mturque...@baylibre.com> Cc: Stephen Boyd <sb...@kernel.org> Cc: Joel Stanley <j...@jms.id.au> Cc: Andrew Jeffery <and...@aj.id.au> Cc: Taichi Sugaya <sugaya.tai...@socionext.com> Cc: Takao Orito <orito.ta...@socionext.com> Cc: Qin Jian <qinj...@cqplus1.com> Cc: Andrew Lunn <and...@lunn.ch> Cc: Gregory Clement <gregory.clem...@bootlin.com> Cc: Sebastian Hesselbarth <sebastian.hesselba...@gmail.com> Cc: Andy Gross <agr...@kernel.org> Cc: Bjorn Andersson <anders...@kernel.org> Cc: Konrad Dybcio <konrad.dyb...@linaro.org> Cc: Sergio Paracuellos <sergio.paracuel...@gmail.com> Cc: Matthias Brugger <matthias....@gmail.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delre...@collabora.com> Cc: Maxime Ripard <mrip...@kernel.org> Cc: Chen-Yu Tsai <w...@csie.org> Cc: Jernej Skrabec <jernej.skra...@gmail.com> Cc: David Airlie <airl...@gmail.com> Cc: Daniel Vetter <dan...@ffwll.ch> Cc: Samuel Holland <sam...@sholland.org> Cc: Vinod Koul <vk...@kernel.org> Cc: Kishon Vijay Abraham I <kis...@kernel.org> Cc: linux-...@vger.kernel.org Cc: linux-arm-ker...@lists.infradead.org Cc: linux-asp...@lists.ozlabs.org Cc: linux-arm-...@vger.kernel.org Cc: linux-media...@lists.infradead.org Cc: dri-devel@lists.freedesktop.org Cc: linux-su...@lists.linux.dev Cc: linux-...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/clk/clk-aspeed.c | 3 +-- drivers/clk/clk-ast2600.c | 2 +- drivers/clk/clk-gemini.c | 2 +- drivers/clk/clk-milbeaut.c | 3 +-- drivers/clk/clk-sp7021.c | 3 +-- drivers/clk/mvebu/cp110-system-controller.c | 2 +- drivers/clk/qcom/clk-cpu-8996.c | 2 +- drivers/clk/ralink/clk-mt7621.c | 3 +-- drivers/gpu/drm/sun4i/sun8i_tcon_top.c | 3 +-- drivers/phy/qualcomm/phy-qcom-edp.c | 2 +- include/linux/clk-provider.h | 2 +- 11 files changed, 11 insertions(+), 16 deletions(-) diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c index 284710adaef5..ff84191d0fe8 100644 --- a/drivers/clk/clk-aspeed.c +++ b/drivers/clk/clk-aspeed.c @@ -701,6 +701,7 @@ static void __init aspeed_cc_init(struct device_node *np) GFP_KERNEL); if (!aspeed_clk_data) return; + aspeed_clk_data->num = ASPEED_NUM_CLKS; /* * This way all clocks fetched before the platform device probes, @@ -732,8 +733,6 @@ static void __init aspeed_cc_init(struct device_node *np) aspeed_ast2500_cc(map); else pr_err("unknown platform, failed to add clocks\n"); - - aspeed_clk_data->num = ASPEED_NUM_CLKS; ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_clk_data); if (ret) pr_err("failed to add DT provider: %d\n", ret); diff --git a/drivers/clk/clk-ast2600.c b/drivers/clk/clk-ast2600.c index f9e27f95a967..909c3137c428 100644 --- a/drivers/clk/clk-ast2600.c +++ b/drivers/clk/clk-ast2600.c @@ -839,6 +839,7 @@ static void __init aspeed_g6_cc_init(struct device_node *np) ASPEED_G6_NUM_CLKS), GFP_KERNEL); if (!aspeed_g6_clk_data) return; + aspeed_g6_clk_data->num = ASPEED_G6_NUM_CLKS; /* * This way all clocks fetched before the platform device probes, @@ -860,7 +861,6 @@ static void __init aspeed_g6_cc_init(struct device_node *np) } aspeed_g6_cc(map); - aspeed_g6_clk_data->num = ASPEED_G6_NUM_CLKS; ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, aspeed_g6_clk_data); if (ret) pr_err("failed to add DT provider: %d\n", ret); diff --git a/drivers/clk/clk-gemini.c b/drivers/clk/clk-gemini.c index a23fa6d47ef1..2572d15aadd0 100644 --- a/drivers/clk/clk-gemini.c +++ b/drivers/clk/clk-gemini.c @@ -404,6 +404,7 @@ static void __init gemini_cc_init(struct device_node *np) GFP_KERNEL); if (!gemini_clk_data) return; + gemini_clk_data->num = GEMINI_NUM_CLKS; /* * This way all clock fetched before the platform device probes, @@ -457,7 +458,6 @@ static void __init gemini_cc_init(struct device_node *np) gemini_clk_data->hws[GEMINI_CLK_APB] = hw; /* Register the clocks to be accessed by the device tree */ - gemini_clk_data->num = GEMINI_NUM_CLKS; of_clk_add_hw_provider(np, of_clk_hw_onecell_get, gemini_clk_data); } CLK_OF_DECLARE_DRIVER(gemini_cc, "cortina,gemini-syscon", gemini_cc_init); diff --git a/drivers/clk/clk-milbeaut.c b/drivers/clk/clk-milbeaut.c index 050fd4fb588f..18c20aff45f7 100644 --- a/drivers/clk/clk-milbeaut.c +++ b/drivers/clk/clk-milbeaut.c @@ -618,6 +618,7 @@ static void __init m10v_cc_init(struct device_node *np) if (!m10v_clk_data) return; + m10v_clk_data->num = M10V_NUM_CLKS; base = of_iomap(np, 0); if (!base) { @@ -654,8 +655,6 @@ static void __init m10v_cc_init(struct device_node *np) base + CLKSEL(1), 0, 3, 0, rclk_table, &m10v_crglock, NULL); m10v_clk_data->hws[M10V_RCLK_ID] = hw; - - m10v_clk_data->num = M10V_NUM_CLKS; of_clk_add_hw_provider(np, of_clk_hw_onecell_get, m10v_clk_data); } CLK_OF_DECLARE_DRIVER(m10v_cc, "socionext,milbeaut-m10v-ccu", m10v_cc_init); diff --git a/drivers/clk/clk-sp7021.c b/drivers/clk/clk-sp7021.c index 11d22043ddd7..01d3c4c7b0b2 100644 --- a/drivers/clk/clk-sp7021.c +++ b/drivers/clk/clk-sp7021.c @@ -621,6 +621,7 @@ static int sp7021_clk_probe(struct platform_device *pdev) GFP_KERNEL); if (!clk_data) return -ENOMEM; + clk_data->num = CLK_MAX; hws = clk_data->hws; pd_ext.index = 0; @@ -688,8 +689,6 @@ static int sp7021_clk_probe(struct platform_device *pdev) return PTR_ERR(hws[i]); } - clk_data->num = CLK_MAX; - return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data); } diff --git a/drivers/clk/mvebu/cp110-system-controller.c b/drivers/clk/mvebu/cp110-system-controller.c index 84c8900542e4..03c59bf22106 100644 --- a/drivers/clk/mvebu/cp110-system-controller.c +++ b/drivers/clk/mvebu/cp110-system-controller.c @@ -240,9 +240,9 @@ static int cp110_syscon_common_probe(struct platform_device *pdev, GFP_KERNEL); if (!cp110_clk_data) return -ENOMEM; + cp110_clk_data->num = CP110_CLK_NUM; cp110_clks = cp110_clk_data->hws; - cp110_clk_data->num = CP110_CLK_NUM; /* Register the PLL0 which is the root of the hw tree */ pll0_name = ap_cp_unique_name(dev, syscon_node, "pll0"); diff --git a/drivers/clk/qcom/clk-cpu-8996.c b/drivers/clk/qcom/clk-cpu-8996.c index 592c7c3cdeb7..72689448a653 100644 --- a/drivers/clk/qcom/clk-cpu-8996.c +++ b/drivers/clk/qcom/clk-cpu-8996.c @@ -590,6 +590,7 @@ static int qcom_cpu_clk_msm8996_driver_probe(struct platform_device *pdev) data = devm_kzalloc(dev, struct_size(data, hws, 2), GFP_KERNEL); if (!data) return -ENOMEM; + data->num = 2; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) @@ -605,7 +606,6 @@ static int qcom_cpu_clk_msm8996_driver_probe(struct platform_device *pdev) data->hws[0] = &pwrcl_pmux.clkr.hw; data->hws[1] = &perfcl_pmux.clkr.hw; - data->num = 2; return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, data); } diff --git a/drivers/clk/ralink/clk-mt7621.c b/drivers/clk/ralink/clk-mt7621.c index d95a33293b0a..92d14350c4b3 100644 --- a/drivers/clk/ralink/clk-mt7621.c +++ b/drivers/clk/ralink/clk-mt7621.c @@ -521,6 +521,7 @@ static int mt7621_clk_probe(struct platform_device *pdev) GFP_KERNEL); if (!clk_data) return -ENOMEM; + clk_data->num = count; for (i = 0; i < ARRAY_SIZE(mt7621_clks_base); i++) clk_data->hws[i] = mt7621_clk_early[i]; @@ -537,8 +538,6 @@ static int mt7621_clk_probe(struct platform_device *pdev) goto unreg_clk_fixed; } - clk_data->num = count; - ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clk_data); if (ret) { dev_err(dev, "Couldn't add clk hw provider\n"); diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c index 6f076cf4b403..a1ca3916f42b 100644 --- a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c +++ b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c @@ -141,6 +141,7 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, GFP_KERNEL); if (!clk_data) return -ENOMEM; + clk_data->num = CLK_NUM; tcon_top->clk_data = clk_data; spin_lock_init(&tcon_top->reg_lock); @@ -213,8 +214,6 @@ static int sun8i_tcon_top_bind(struct device *dev, struct device *master, goto err_unregister_gates; } - clk_data->num = CLK_NUM; - ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get, clk_data); if (ret) diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c index e0e722b9be31..8e5078304646 100644 --- a/drivers/phy/qualcomm/phy-qcom-edp.c +++ b/drivers/phy/qualcomm/phy-qcom-edp.c @@ -744,6 +744,7 @@ static int qcom_edp_clks_register(struct qcom_edp *edp, struct device_node *np) data = devm_kzalloc(edp->dev, struct_size(data, hws, 2), GFP_KERNEL); if (!data) return -ENOMEM; + data->num = 2; snprintf(name, sizeof(name), "%s::link_clk", dev_name(edp->dev)); init.ops = &qcom_edp_dp_link_clk_ops; @@ -763,7 +764,6 @@ static int qcom_edp_clks_register(struct qcom_edp *edp, struct device_node *np) data->hws[0] = &edp->dp_link_hw; data->hws[1] = &edp->dp_pixel_hw; - data->num = 2; return devm_of_clk_add_hw_provider(edp->dev, of_clk_hw_onecell_get, data); } diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 0f0cd01906b4..ec32ec58c59f 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -1379,7 +1379,7 @@ struct clk_onecell_data { struct clk_hw_onecell_data { unsigned int num; - struct clk_hw *hws[]; + struct clk_hw *hws[] __counted_by(num); }; #define CLK_OF_DECLARE(name, compat, fn) \ -- 2.34.1
