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+0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787308177; bh=wJPeVQgm5j/WSE7VShIXcWxl9EhpW+1WepDlwjN0hBo=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=JNfInL2eM/U2Lv09rwG8C/4uN2uGeNF5d3GAhCuePHmFbHsYCyLYbolc0vAqhQ7at wxz6rQxS/1s9zgMoMVPoj8xyZx0IxH5aAuuuZt8ndu4oEDTdowC6KmDLSWli1hu9do GbQvsFGSFE2b8jLV1qfzPhY4RB5+3WtOVqTROiMDGsdS8gtlxxqGbw6UU9/BLym/TE yp2WC1PhZD1d6t76BI1ypCR6MXc120GPDKNGVGi7MNm9PQ/kJmmL7rAWchhsQaEB1v u7h1vvAqQi8OJNjIx6Aih+KnfTwWNTIT9sy+z/nymf4Zv9P0UX+nVXA6hjsvQJf0oe wkwraRC5e/KzA== From: sashiko-bot@kernel.org Subject: Re: [PATCH 2/2] phy: rockchip: Make sure clk_init_data is fully initialized Reply-To: sashiko-reviews@lists.linux.dev To: "Geert Uytterhoeven" Cc: linux-clk@vger.kernel.org, neil.armstrong@linaro.org, olteanv@gmail.com, vkoul@kernel.org, linux-phy@lists.infradead.org In-Reply-To: References: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 21 Aug 2026 10:29:36 +0000 Message-Id: <20260821102936.F2AEE1F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Thank you for your contribution! Sashiko AI review found 2 potential issue(= s) to consider: Pre-existing issues: - [High] Incorrect validation of the `refclk` pointer results in registerin= g a clock with 1 parent but a NULL parent name if the optional 'phyclk' is = missing. - [High] Missing `of_clk_del_provider` on the error path of `inno_hdmi_phy_= probe`, leading to a use-after-free in the OF clock provider list. -- --- Patch [2]: [PATCH 2/2] phy: rockchip: Make sure clk_init_data is fully = initialized --- commit 830443ad1b9c48211b68c5bb691a7101b0e76d09 Author: Geert Uytterhoeven phy: rockchip: Make sure clk_init_data is fully initialized This commit zero-initializes the clk_init_data structures across several rockchip phy drivers to ensure all mutually-exclusive members are cleared. This prevents subtle bugs when specific initialization configurations are enabled. > diff --git a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c b/drivers/phy/= rockchip/phy-rockchip-inno-hdmi.c > index 1483907413faa..80aeed965c3f3 100644 > --- a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c > +++ b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c > @@ -999,7 +999,7 @@ static int inno_hdmi_phy_clk_register(struct inno_hdm= i_phy *inno) > { > struct device *dev =3D inno->dev; > struct device_node *np =3D dev->of_node; > - struct clk_init_data init; > + struct clk_init_data init =3D {}; > const char *parent_name; > int ret; [Severity: High] This isn't a bug introduced by this patch, but does the clock provider registration here leak on the probe error path? In inno_hdmi_phy_probe(), if devm_of_phy_provider_register() fails after the clock is registered: inno_hdmi_phy_probe() { ... ret =3D inno_hdmi_phy_clk_register(inno); // Calls of_clk_add_provider() which adds to global list ... phy_provider =3D devm_of_phy_provider_register(...); return PTR_ERR_OR_ZERO(phy_provider); } If the phy provider registration fails, the probe aborts without calling of_clk_del_provider(). Devres will free inno->phyclk, leaving a dangling pointer in the global of_clk_providers list which could trigger a use-after-free during subsequent clock lookups. > diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/= rockchip/phy-rockchip-inno-usb2.c > index 7d8a533f24aea..e47b89015586f 100644 > --- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c > +++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c > @@ -400,7 +400,7 @@ static int > rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy) > { > struct device_node *node =3D rphy->dev->of_node; > - struct clk_init_data init; > + struct clk_init_data init =3D {}; > struct clk *refclk =3D NULL; > const char *clk_name; > int i; [Severity: High] This is a pre-existing issue, but does this function correctly handle missing optional clocks later in the logic? If the optional phyclk is not found, refclk remains NULL. However, the validation check further down evaluates NULL as true: rockchip_usb2phy_clk480m_register() { ... if (!IS_ERR(refclk)) { clk_name =3D __clk_get_name(refclk); init.parent_names =3D &clk_name; init.num_parents =3D 1; } else { ... } } Since !IS_ERR(NULL) is true, it attempts to register the clock with 1 parent and a NULL parent name, causing clk_register() to fail with -EINVAL and breaking USB PHY support on platforms missing this clock. [ ... ] --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/cover.1787240165.gi= t.geert+renesas@glider.be?part=3D2