From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (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 B351F36AB5E for ; Fri, 29 May 2026 11:54:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780055657; cv=none; b=CUvTkYSPfI2SZcOw9eWBwZwYBOsG2W65WIr7cEVQJsPYgS2NGgw+YRTLeET7Uyt1J6T+DQv1hZRMn4qBN5vsfYbXzWcpIyRauco1/Z7BDJy9rUs7t+/B9jbQHD1FS3GezD+AZO4RBGAfqIGrAi1AGMyjL1hL9Y0jVqF6TRDK+OE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780055657; c=relaxed/simple; bh=HHUIRMWGDIsqL9kQs+dk2T94LYVQaVJ3tsM6Xq18TxY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mg2t5ZcOIAyi5sLxMEABb4rXXD4YxoTxiIPuXODcswf0ZVgPXRCy8nkcitTb0jloYEZTEymApEf+sMKlEDceuv/K6TwI0fPf4PpaOlNg3enB3uvpwr/r2muEfFcOx8zMZwnZ/h+H2EF4bQ0Yp2YkbL//iUzT51t2HuSZxptdU7A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=V8myalZS; arc=none smtp.client-ip=192.198.163.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="V8myalZS" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1780055656; x=1811591656; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=HHUIRMWGDIsqL9kQs+dk2T94LYVQaVJ3tsM6Xq18TxY=; b=V8myalZSHVp1Tiw/+vxXg4aR+y31GfW/rtEmhsh4biDQdfLYFQUHSad1 oPZNvvhfpZO6WbtyNPgwCY1aFHt5rBbjMzU1lYahm9ijyuLM69GUp0QMs ODXEP9yw7x0n1VMIkj1jWvirWI9i93TE5lJ42DJsmRKKAZ/issZomyT8J 4xeheepsEDId9BNAENlYuOY5jyRPp4RwavbTEFsxU3tBNlcmiGufv9mEj qRJPREhbp0YEwsOwbsDy79f59HDz7QCwwcalv/eTsm8/2CZCIl+CuFycw oHrsZl/OhP0R8SnkT9fj8iIB5YX4RIcWsBBiVK0aFcjBi+3P7FZnnu0JM w==; X-CSE-ConnectionGUID: 3v8MfYYwTjq8FWmeLBr8Ww== X-CSE-MsgGUID: wBdYG6dcQFef46ud6TlGcA== X-IronPort-AV: E=McAfee;i="6800,10657,11800"; a="68442134" X-IronPort-AV: E=Sophos;i="6.24,175,1774335600"; d="scan'208";a="68442134" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2026 04:54:15 -0700 X-CSE-ConnectionGUID: HdUtu0leQSyQokDpHftIxA== X-CSE-MsgGUID: 19d323utQMywhjVNZ0K+Fg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,175,1774335600"; d="scan'208";a="238429993" Received: from akacprow-dev3.igk.intel.com ([10.91.220.47]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 May 2026 04:54:14 -0700 From: Andrzej Kacprowski To: andrzej.kacprowski@linux.intel.com Cc: stable@vger.kernel.org Subject: [PATCH] accel/ivpu: Fix signed integer truncation in IPC receive Date: Fri, 29 May 2026 13:50:05 +0200 Message-ID: <20260529115005.131888-1-andrzej.kacprowski@linux.intel.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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