From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f72.google.com (mail-oo1-f72.google.com [209.85.161.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A3D4634E75D for ; Thu, 6 Aug 2026 08:16:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786004191; cv=none; b=snWiRNTgCo/Jn2M7/XVhGfkOOexLxyKduESFnPOMXkMBcf+2rz5WiQRAPELBXWcKXeqLwAlHCgKDKCQXbA7zuxUNTtq1S/HXwULCzYlQjSm9p/A+CPZoKW8eeQVR/43kAWGkhG2EZJ0qCnxzffuLUckNQJohN4RT9MnNCYgVq68= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786004191; c=relaxed/simple; bh=5P0v/lRDR7ivUYtXby6sECjrxIvgSB0Ch3lzc+Q39bg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=LEX+ku865/RiZxqfg1i2jVbNmQ+ae7RKrrnNzD2cD9fhLauYyfwYob5IelwFF1cQC/7Gbx7eFYp5sOzp2FgayVbKaWUymDkZyr/F08Y4OB+UePuISjn4ezHWyLOeesSEuz5KBApotrcFzZngLMKhAcwTp/G6cz2OyhgL/C1a8kA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f72.google.com with SMTP id 006d021491bc7-6acaccb8b0cso1461562eaf.0 for ; Thu, 06 Aug 2026 01:16:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786004188; x=1786608988; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=8XSlsAOiMFD+JKSPtL77gL5cilFtUNhHRNm8KX+lxvs=; b=VnGZMvHPqfYtOyx101pjHGeLuv4xAcREGsAuV2pw/fG13328xycX/J74ovQC63MgUA mcWsNaoLcbjYlsd1lgXw35KtbWFLjBlIBG7WwfPR2axuPiBk2UQGmFuz8rDZYJAepoyJ v/aNpetizvhiNNvfkjIGPZPFvoQN79FlGt7aKXrYz/trNjArfz36FHo5PcpI3onxQlqC 1B5OBsCHK9vUDTc9m06iNBdTaLPYljr7g5qD+V4y2igBS64qy57SzR6BPZfdqdDkC4S5 cfs/DRHGO73rf95hYpDgFr5/cfnh5Rt85M3PqqRmYX+1gGxqqilqiT+g+e/ZTS2XcH9E 8+tw== X-Gm-Message-State: AOJu0YyqDbTawvpwDmrkn+B22Hvk8SWEztkBjvrzpXGiIYkCbraiOebq mr/m5CSu1f8WBjZps7gT4sl8/gKqMo9SBOPkeDrFgmv5rhenKHUUVSmm/BiQ7wtCdng0rDIV6QZ yLSfGh6RG1DS+TLyM8kL9m56Wzt8i+NJfy98IX/LAHeZDbOIFkBc7xrGIpx0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1519:b0:6ac:ba90:2e9b with SMTP id 006d021491bc7-6ae96cb54b5mr6289357eaf.12.1786004188578; Thu, 06 Aug 2026 01:16:28 -0700 (PDT) Date: Thu, 06 Aug 2026 01:16:28 -0700 In-Reply-To: <6a73bcd5.01d0871a.3a0d52.0003.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7442dc.6851e1c7.236b5a.0004.GAE@google.com> Subject: Forwarded: [PATCH] drm/i915: Guard against NULL driver_data in i915_pci_probe() From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: [PATCH] drm/i915: Guard against NULL driver_data in i915_pci_probe() Author: kartikey406@gmail.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master pci_match_device() can return the dummy pci_device_id_any entry when a device is force-bound via sysfs driver_override, in which case ->driver_data is unset (NULL). i915_pci_probe() casts it to struct intel_device_info * unconditionally and dereferences intel_info->require_force_probe, causing a NULL-ptr-deref. Reported-by: syzbot+db96c5ff032f4292a8dc@syzkaller.appspotmail.com Tested-by: syzbot+db96c5ff032f4292a8dc@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=db96c5ff032f4292a8dc Signed-off-by: Deepanshu Kartikey --- drivers/gpu/drm/i915/i915_pci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 82415af47d54..2f03f95945f1 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -958,6 +958,9 @@ static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) (struct intel_device_info *) ent->driver_data; int err; + if (!intel_info) + return -ENODEV; + if (intel_info->require_force_probe && !id_forced(pdev->device)) { dev_info(&pdev->dev, "Your graphics device %04x is not properly supported by i915 in this\n" -- 2.34.1