From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E1E71CD6E43 for ; Fri, 29 May 2026 11:59:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 319B410FDFB; Fri, 29 May 2026 11:59:07 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="cdNP1OLm"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) by gabe.freedesktop.org (Postfix) with ESMTPS id 30FBD10FDF7 for ; Fri, 29 May 2026 11:59:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1780055946; x=1811591946; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=HHUIRMWGDIsqL9kQs+dk2T94LYVQaVJ3tsM6Xq18TxY=; b=cdNP1OLmC86f2izVRNHKSM8y5/kchhVEw7lNWu5h0YSLFYZPPPjflSvk Xo8RvPR6BMaf12O1CA7syb19dVwLr/YkXlNUdQmwG1TKvtv4JDSUdE2iJ IlejvWyGvPuUqmVVt9IwDtCDr8cINg2XY4m3l+SE3UUCv0GgalA8TFKud pX9O/2BvcngoEC/sbz7TFovxBxc0OO1b1MQuNHesWEwBaPlpMPyg1I5Hp sZj2mG8Yfyi0wG2u04H4bJYqJF0IogA+WaqESMwESw7Ni4Zb2kqrKwmOB JDSILHDKK9sIZyKRSJVEwgDoUk/xbQRIjtz3aDtd7GIFT+kFA1IkmhRIa w==; X-CSE-ConnectionGUID: 7htad/dEQmquj4qVCjqyzA== X-CSE-MsgGUID: FuuXrCE+TPmeX0w+uJsVCg== X-IronPort-AV: E=McAfee;i="6800,10657,11800"; a="80935257" X-IronPort-AV: E=Sophos;i="6.24,175,1774335600"; d="scan'208";a="80935257" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2026 04:59:06 -0700 X-CSE-ConnectionGUID: Jcl0HK4SSwmVhBT8VpUgoQ== X-CSE-MsgGUID: 4sl67yWJTPKr9zzQS4ratg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,175,1774335600"; d="scan'208";a="241788413" Received: from akacprow-dev3.igk.intel.com ([10.91.220.47]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2026 04:59:04 -0700 From: Andrzej Kacprowski To: dri-devel@lists.freedesktop.org Cc: oded.gabbay@gmail.com, jeff.hugo@oss.qualcomm.com, lizhi.hou@amd.com, karol.wachowski@linux.intel.com, dawid.osuchowski@linux.intel.com, Andrzej Kacprowski , stable@vger.kernel.org Subject: [PATCH] accel/ivpu: Fix signed integer truncation in IPC receive Date: Fri, 29 May 2026 13:54:53 +0200 Message-ID: <20260529115453.132291-1-andrzej.kacprowski@linux.intel.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Fix potential buffer overflow where firmware-supplied data_size is cast to signed int before being used in min_t(). Large unsigned values (>= 0x80000000) become negative, causing unsigned wraparound and oversized memcpy operations that can overflow the stack buffer. Change min_t(int, ...) to min_t(u32, ...) to ensure large values are properly clamped instead of becoming negative. Fixes: 3b434a3445ff ("accel/ivpu: Use threaded IRQ to handle JOB done messages") Cc: # v6.18+ Signed-off-by: Andrzej Kacprowski --- drivers/accel/ivpu/ivpu_ipc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/accel/ivpu/ivpu_ipc.c b/drivers/accel/ivpu/ivpu_ipc.c index f47df092bb0d..9980a7898bed 100644 --- a/drivers/accel/ivpu/ivpu_ipc.c +++ b/drivers/accel/ivpu/ivpu_ipc.c @@ -276,7 +276,7 @@ int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, if (ipc_buf) memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf)); if (rx_msg->jsm_msg) { - u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); + u32 size = min_t(u32, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) { ivpu_err(vdev, "IPC resp result error: %d\n", rx_msg->jsm_msg->result); -- 2.43.0