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Sun, 12 Oct 2025 22:26:43 -0700 (PDT) Received: from [192.168.100.70] ([2800:bf0:82:3d2:875c:6c76:e06b:3095]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-554d80a456csm2823171e0c.14.2025.10.12.22.26.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 12 Oct 2025 22:26:42 -0700 (PDT) From: Kurt Borja Date: Mon, 13 Oct 2025 00:26:26 -0500 Subject: [PATCH v2] platform/x86: alienware-wmi-wmax: Fix null pointer derefence in sleep handlers Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251013-sleep-fix-v2-1-1ad8bdb79585@gmail.com> X-B4-Tracking: v=1; b=H4sIAIGN7GgC/03MQQrDIBCF4auEWdfiGAzYVe9RsjA6TQaSGDRIS /DutYFCl//j8R2QKDIluDUHRMqcOKw11KUBN9l1JMG+NiipNEpUIs1Em3jyS2gvtem8N8q2UP9 bpDqf1qOvPXHaQ3yfdMbv+lPaPyWjQGHU4BCHjpyl+7hYnq8uLNCXUj56xq9logAAAA== X-Change-ID: 20251012-sleep-fix-5d0596dd92a3 To: Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Armin Wolf Cc: platform-driver-x86@vger.kernel.org, Dell.Client.Kernel@dell.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Gal Hammer , Kurt Borja X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2073; i=kuurtb@gmail.com; h=from:subject:message-id; bh=bte+/wVXcSwCx7MOPocExUhSsc8jEuDiXCklRhPJ27Q=; b=owGbwMvMwCUmluBs8WX+lTTG02pJDBlveifKcc/+nSOSsjfYylpj8yOhFKW5b119Os6ohc79N l93wV/mjlIWBjEuBlkxRZb2hEXfHkXlvfU7EHofZg4rE8gQBi5OAZjI52uMDCs2x3aqxHp/169R v/Bx8tVU/YU7ArkdNa/7VL67tj/Z0prhf4ik59GDG3/LRu/9KNXfdWJOwlGbyK9/vnYX1z5WUnd NYwcA X-Developer-Key: i=kuurtb@gmail.com; a=openpgp; fpr=54D3BE170AEF777983C3C63B57E3B6585920A69A Initialize `awcc` with empty quirks to avoid a null pointer dereference in sleep handlers for devices without the AWCC interface. This also allows some code simplification in alienware_wmax_wmi_init(). Cc: stable@vger.kernel.org Reported-by: Gal Hammer Tested-by: Gal Hammer Fixes: 07ac275981b1 ("platform/x86: alienware-wmi-wmax: Add support for man= ual fan control") Signed-off-by: Kurt Borja --- Changes in v2: - Little logic mistake in the `force_gmode` path... (oops) - Link to v1: https://lore.kernel.org/r/20251013-sleep-fix-v1-1-92bc11b6eca= e@gmail.com --- drivers/platform/x86/dell/alienware-wmi-wmax.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platf= orm/x86/dell/alienware-wmi-wmax.c index 31f9643a6a3b5c2eb74b089dc071964bd6df8b43..cefeef84d85d111e9cc15ebed35= fb83f03c41c7c 100644 --- a/drivers/platform/x86/dell/alienware-wmi-wmax.c +++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c @@ -393,7 +393,7 @@ static const enum platform_profile_option awcc_mode_to_= platform_profile[AWCC_PRO [AWCC_PROFILE_LEGACY_PERFORMANCE] =3D PLATFORM_PROFILE_PERFORMANCE, }; =20 -static struct awcc_quirks *awcc; +static struct awcc_quirks *awcc =3D &empty_quirks; =20 /* * The HDMI mux sysfs node indicates the status of the HDMI input mux. @@ -1680,22 +1680,14 @@ int __init alienware_wmax_wmi_init(void) if (id) awcc =3D id->driver_data; =20 - if (force_hwmon) { - if (!awcc) - awcc =3D &empty_quirks; - + if (force_hwmon) awcc->hwmon =3D true; - } - - if (force_platform_profile) { - if (!awcc) - awcc =3D &empty_quirks; =20 + if (force_platform_profile) awcc->pprof =3D true; - } =20 if (force_gmode) { - if (awcc) + if (awcc->pprof) awcc->gmode =3D true; else pr_warn("force_gmode requires platform profile support\n"); --- base-commit: 3ed17349f18774c24505b0c21dfbd3cc4f126518 change-id: 20251012-sleep-fix-5d0596dd92a3 --=20 ~ Kurt