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Tue, 14 Oct 2025 03:07:44 -0700 (PDT) Received: from [192.168.100.70] ([2800:bf0:82:3d2:875c:6c76:e06b:3095]) by smtp.gmail.com with ESMTPSA id ada2fe7eead31-5d5fc8b5e06sm4223171137.11.2025.10.14.03.07.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 03:07:44 -0700 (PDT) From: Kurt Borja Date: Tue, 14 Oct 2025 05:07:27 -0500 Subject: [PATCH v3] platform/x86: alienware-wmi-wmax: Fix null pointer dereference in sleep handlers Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251014-sleep-fix-v3-1-b5cb58da4638@gmail.com> X-B4-Tracking: v=1; b=H4sIAN4g7mgC/3WMywrCMBBFf6XM2kgnJbVx5X+IizzGdqAvEglK6 b+bFoRuXJ7LPWeBSIEpwrVYIFDiyNOYoToV4DoztiTYZwZZSoUlShF7olk8+S2UL5WuvdfSVJD /c6A87637I3PH8TWFz55OuK2/SnWoJBQotLQO0dbkDN3awXB/dtMAWyXJv6bMJhrfWG8vWjXqa K7r+gUUpzkC3AAAAA== 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 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1736; i=kuurtb@gmail.com; h=from:subject:message-id; bh=52B6KKCTmHzTmQ3h+uIgnxRU4z72GzjP6jDC3Lo/rJ0=; b=owGbwMvMwCUmluBs8WX+lTTG02pJDBnvFJ5WCu949E1z0caTm/kcs7jvFdzYol4XeuPI13ijE /Xe7/hSOkpZGMS4GGTFFFnaExZ9exSV99bvQOh9mDmsTCBDGLg4BWAiR20ZGT7IimiGRjVPvHb7 Rtml/v9rtB467lAX2J718b16/reHE3MZ/idmFNj3Vbiwf3tlsWG94cGcf0WHHQT2WN/m3/alWM9 cjhkA X-Developer-Key: i=kuurtb@gmail.com; a=openpgp; fpr=54D3BE170AEF777983C3C63B57E3B6585920A69A Devices without the AWCC interface don't initialize `awcc`. Add a check before dereferencing it in sleep handlers. Cc: stable@vger.kernel.org Reported-by: Gal Hammer Tested-by: Gal Hammer Fixes: 07ac275981b1 ("platform/x86: alienware-wmi-wmax: Add support for manual fan control") Signed-off-by: Kurt Borja --- Changes in v3: - Fix typo in title - Go for a simpler approach because the last one prevented the old driver interface from loading - Link to v2: https://lore.kernel.org/r/20251013-sleep-fix-v2-1-1ad8bdb79585@gmail.com Changes in v2: - Little logic mistake in the `force_gmode` path... (oops) - Link to v1: https://lore.kernel.org/r/20251013-sleep-fix-v1-1-92bc11b6ecae@gmail.com --- drivers/platform/x86/dell/alienware-wmi-wmax.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platform/x86/dell/alienware-wmi-wmax.c index 31f9643a6a3b..b106e8e407b3 100644 --- a/drivers/platform/x86/dell/alienware-wmi-wmax.c +++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c @@ -1639,7 +1639,7 @@ static int wmax_wmi_probe(struct wmi_device *wdev, const void *context) static int wmax_wmi_suspend(struct device *dev) { - if (awcc->hwmon) + if (awcc && awcc->hwmon) awcc_hwmon_suspend(dev); return 0; @@ -1647,7 +1647,7 @@ static int wmax_wmi_suspend(struct device *dev) static int wmax_wmi_resume(struct device *dev) { - if (awcc->hwmon) + if (awcc && awcc->hwmon) awcc_hwmon_resume(dev); return 0; --- base-commit: 3ed17349f18774c24505b0c21dfbd3cc4f126518 change-id: 20251012-sleep-fix-5d0596dd92a3 -- ~ Kurt