From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-178.mta1.migadu.com (out-178.mta1.migadu.com [95.215.58.178]) (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 A1AA12ECEB9 for ; Sat, 18 Apr 2026 07:15:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776496517; cv=none; b=KyiM7Tq/a7eaWx29BQKqsnRdKUAUoHiOgNMxTaq9CQRiTqIJkYmq766kAdXKOOJddFRd0/tWfnA6pftldhePS7IqpEHnYq0BrOOAZsBFXp5b7Ip1vnDmt+OcXqd+BcIT/I+atSwiyQnBnu2kmBASmdzkV1CIMFN0lpeyraX0PHs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776496517; c=relaxed/simple; bh=UdTrcCZ8c2AsrJMrDKOnXIWkWQJtK/pz8EGZ/2/axYg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=k20gCBA5Of47i7YqMQZS1SlIfIOFqN0FcypWu/vnvwULgt3f6z3vu0F5qYk0qNhDe1C+SjZ6/6wZEmhBAA3X2pA3+rXR8jAKkfDcshcxZJ9OHfcGeqDSqvL/SZMevLgptPk2jRPxgv4ejoGu/xiDLamSl0UL7bps26r1EtZ3Mfg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=V5rT1sNt; arc=none smtp.client-ip=95.215.58.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="V5rT1sNt" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1776496514; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=Js94wbc4pDN53oPKaEyr9Z/xYgd7eeyMz4Yr23dqCSM=; b=V5rT1sNtYq39uWtlNmRaLQvaNfkD0N8WwuMXIQX6FCbbsCVkbC8neQ5FGWp5btlJBHWr5V SCcHuvnn+eSgLjm5CHDN1UZCIRalfwNePFJwNdDY75ws053wG4uv7rB5pa0NRuIFAN0dVm siHy633Z3M0GRNtz+B7QXXDmaCLKbRU= From: sunliming@linux.dev To: lyude@redhat.com, dakr@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch Cc: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, sunliming Subject: [PATCH] drm/nouveau/gsp: Fix possible NULL pointer dereference warning in r535_dmac_alloc Date: Sat, 18 Apr 2026 15:14:12 +0800 Message-Id: <20260418071412.86022-1-sunliming@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT From: sunliming Fix below smatch warnings: drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c:178 r535_dmac_alloc() warn: 'args' can also be NULL Signed-off-by: sunliming --- drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c index 6e63df816d85..6dec2623d0be 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c @@ -172,6 +172,8 @@ r535_dmac_alloc(struct nvkm_disp *disp, u32 oclass, int inst, u32 put_offset, args = nvkm_gsp_rm_alloc_get(&disp->rm.object, (oclass << 16) | inst, oclass, sizeof(*args), dmac); + if (!args) + return -ENOMEM; if (IS_ERR(args)) return PTR_ERR(args); -- 2.25.1