From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C43391DF73C; Tue, 30 Sep 2025 15:28:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759246134; cv=none; b=CdzWKGdr/nmhGFsApY3TSQHQnJFSN0KT3fyvGE0i2oOb/mJbRP7B77h01wh/6cnyot/ZgAoJaONcorhYzD15oCv50w263VyGT4Y5e+8dyTS0Xa39jgXU3m1VqXaCfxNZAkCne60y+8s2V/+O6fN6AHR2CeZoOaI7u/KkKgH/MSA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759246134; c=relaxed/simple; bh=Fvd34rEcS884F41YWLfGqFsiOMiFo9OLRaCK1kUASUE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BclIICzJyZ67iBOkyP8AUhcWoIc5KoYzniMxDLFaVy3gKR4V1t2w8SobEVVMaGY7/HbD7vQh+g4+92yWPhL0AY5300u/uSRyeOWWQGbzL9ogyTpJpiBLTzif7nf0EaXNmI4AV4soblKEFOxtpFB+cdqEFN81BDzxHgWbwEJyCl0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jl3Zfj1x; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="jl3Zfj1x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43461C4CEF0; Tue, 30 Sep 2025 15:28:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1759246134; bh=Fvd34rEcS884F41YWLfGqFsiOMiFo9OLRaCK1kUASUE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jl3Zfj1xh75mNtFlPfzqkjWiTKhYGsu9/WrTtq3WCPKmTgH7agMvxzxCMHAdIaaVk ZiysUqW0W639E8W85JGxVfvmQfqHkkX9+z/PTGZU+deNlVQXLtQKW3DiXPS+4tmVLZ OxNhaJJTH2a5AAbQQ04YugxKT2dNRgerfqW2vxAw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zabelin Nikita , Patrik Jakobsson , Sasha Levin Subject: [PATCH 6.12 61/89] drm/gma500: Fix null dereference in hdmi teardown Date: Tue, 30 Sep 2025 16:48:15 +0200 Message-ID: <20250930143824.443887605@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250930143821.852512002@linuxfoundation.org> References: <20250930143821.852512002@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zabelin Nikita [ Upstream commit 352e66900cde63f3dadb142364d3c35170bbaaff ] pci_set_drvdata sets the value of pdev->driver_data to NULL, after which the driver_data obtained from the same dev is dereferenced in oaktrail_hdmi_i2c_exit, and the i2c_dev is extracted from it. To prevent this, swap these calls. Found by Linux Verification Center (linuxtesting.org) with Svacer. Fixes: 1b082ccf5901 ("gma500: Add Oaktrail support") Signed-off-by: Zabelin Nikita Signed-off-by: Patrik Jakobsson Link: https://lore.kernel.org/r/20250918150703.2562604-1-n.zabelin@mt-integration.ru Signed-off-by: Sasha Levin --- drivers/gpu/drm/gma500/oaktrail_hdmi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/gma500/oaktrail_hdmi.c b/drivers/gpu/drm/gma500/oaktrail_hdmi.c index ed8626c73541c..f0ae675581d9a 100644 --- a/drivers/gpu/drm/gma500/oaktrail_hdmi.c +++ b/drivers/gpu/drm/gma500/oaktrail_hdmi.c @@ -726,8 +726,8 @@ void oaktrail_hdmi_teardown(struct drm_device *dev) if (hdmi_dev) { pdev = hdmi_dev->dev; - pci_set_drvdata(pdev, NULL); oaktrail_hdmi_i2c_exit(pdev); + pci_set_drvdata(pdev, NULL); iounmap(hdmi_dev->regs); kfree(hdmi_dev); pci_dev_put(pdev); -- 2.51.0