From nobody Wed Oct 8 02:06:40 2025 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.4]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0E0652AEFE; Thu, 3 Jul 2025 09:29:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751534953; cv=none; b=VqfWXMBOkZu0f2HYrOt2glD9W3yBAFGhcndbuAN+gH2DTaDy6QS3Nq/m2eP5t1NAJ9i5AShZXbfsc1KTCtbgj5TvS3/q1ftjb+mAkutGvV8qD5lq5S1KbnIPyl59wFtVZCcWlXqQywyEYww9yZUA3vP+8leCvzm0/0LruCW2c9A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751534953; c=relaxed/simple; bh=sSsdxWedyMHYMHmezgH2iiuFS2k6wOwmTzvWLPYO6hA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=XSYPw0XYUA5XszmZabdYJI0CoUhOwMzHE/e3Xl9J49kAb9dQ9zqM1QCNrGLcqWGvD9U5wUee8FjOef9BmXdthxJpihGkhf1k/hnz4rpuEpVwV0kRAIeev1uMvyX56k9zwAUei5+d9P4VY+JkMortYry17Zyb0sSn/Hda0MJtaHc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=f75RPnYM; arc=none smtp.client-ip=117.135.210.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="f75RPnYM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=+g tBkV5sxWzTmS5t97Hf7Y/6Sg1riYapDeZfBHBup0Y=; b=f75RPnYMSwlRbPD9re yKj+tWmMMGAjPm27+UYtnZbF8y2zMEmGfZDa342nm8aqUmKM33kWmgfdkqNh7twA ycW2Tqbc/MY+QR/mdqGVdL0RpN5rc/qyga5+X6gvH3woqj4BNL/RiVLwOHI0dvgy SES2W6YheEYVGDYTSqOvD8siI= Received: from icess-ProLiant-DL380-Gen10.. (unknown []) by gzga-smtp-mtada-g0-1 (Coremail) with SMTP id _____wCnLF41TWZoBEn+CA--.4429S4; Thu, 03 Jul 2025 17:28:22 +0800 (CST) From: Haoxiang Li To: maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, sam@ravnborg.org Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Haoxiang Li , stable@vger.kernel.org Subject: [PATCH RESEND] drm: Fix potential null pointer dereference issues in drm_managed.c Date: Thu, 3 Jul 2025 17:28:19 +0800 Message-Id: <20250703092819.2535786-1-haoxiang_li2024@163.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wCnLF41TWZoBEn+CA--.4429S4 X-Coremail-Antispam: 1Uf129KBjvdXoWrZFyrKrW5ur18KFWUWF1fCrg_yoWDtrg_Ca 18Xrn3Wr4kCF95GF4qyw13ZryIka1DCF4vvF47tasayry5Jrn2q34UZr45JryDWF1xuF9r u3WDAryfArsrGjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRN2-eUUUUUU== X-CM-SenderInfo: xkdr5xpdqjszblsqjki6rwjhhfrp/xtbBkAR-bmhmTAAm7wAAsO Content-Type: text/plain; charset="utf-8" Add check for the return value of kstrdup_const() in drm_managed.c to prevent potential null pointer dereference. Fixes: c6603c740e0e ("drm: add managed resources tied to drm_device") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li --- drivers/gpu/drm/drm_managed.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c index cc4c463daae7..368763d4c24e 100644 --- a/drivers/gpu/drm/drm_managed.c +++ b/drivers/gpu/drm/drm_managed.c @@ -151,6 +151,11 @@ int __drmm_add_action(struct drm_device *dev, } =20 dr->node.name =3D kstrdup_const(name, GFP_KERNEL); + if (!dr->node.name) { + kfree(dr); + return -ENOMEM; + } + if (data) { void_ptr =3D (void **)&dr->data; *void_ptr =3D data; @@ -236,6 +241,10 @@ void *drmm_kmalloc(struct drm_device *dev, size_t size= , gfp_t gfp) return NULL; } dr->node.name =3D kstrdup_const("kmalloc", gfp); + if (dr->node.name) { + kfree(dr); + return NULL; + } =20 add_dr(dev, dr); =20 --=20 2.25.1