From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 860F446AEDF; Tue, 16 Jun 2026 15:59:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781625597; cv=none; b=g1CVjqImnk4pKpyk8jleB+3Om3FmSbjyFoygf+cDrIG6Pl32p4aIsunU4KkC32sxcqE3XqvymDyp3TJans+AuXBGpXZQP1CcGNpMBtapgtFaSRuMPO1bccAvtBhd3gnWGhjsVMHGHQSjOVG914kGQ0S92Gc9j6WtMqlprwdUnAY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781625597; c=relaxed/simple; bh=PP/AkbTM3Oj/KkUJ8QJhTgHFm1MkUL0IATYKxI1TQnw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qKN5LClqQFcsCFH2HPmZyk7KVxcDVnRE30+PCsCVV8k6yNZE2LaA7aJFeLJc1Uw2SFTgr8OV/0gdC8hQII+sfMnFy3yHWj59V3A47XOwuO1V8EweQJ7HOBnRsCiF7XdHggpgzsoYWLH3Vw52YEQUSU+VwT6s33VD3Plel5RwSs0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TRX+k6nv; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="TRX+k6nv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C6F81F000E9; Tue, 16 Jun 2026 15:59:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781625596; bh=g7QVX3YGxhvFYuPx0/HHSVMB7VYjI9YfovAQ2SZDUDc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=TRX+k6nvuvnswi9WMNk1KTCJNBdSi55XnNW8Hg6ZiQx1jPEluqWgxe6baOQlcfGdC wlf7NOgUMf/lSDKxIgJWaSZisJ/kr7Y0MU5oJ3nNQg+6WUX1s43MgtBdhvoRhMSZ26 Khf+fxKnWnSZkoJSnA040xpu5ekVe5cPJvnhU+n4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Andrzej Kacprowski , Karol Wachowski Subject: [PATCH 6.18 156/325] accel/ivpu: Fix signed integer truncation in IPC receive Date: Tue, 16 Jun 2026 20:29:12 +0530 Message-ID: <20260616145105.513153963@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145057.827196531@linuxfoundation.org> References: <20260616145057.827196531@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrzej Kacprowski commit d9faef564438d1e4579c692c046603e7ada7bdf4 upstream. 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() as both values are unsigned and can be handled by min() without explicit cast. Fixes: 3b434a3445ff ("accel/ivpu: Use threaded IRQ to handle JOB done messages") Cc: stable@vger.kernel.org # v6.12+ Signed-off-by: Andrzej Kacprowski Reviewed-by: Karol Wachowski Signed-off-by: Karol Wachowski Link: https://patch.msgid.link/20260601161643.229342-1-andrzej.kacprowski@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/accel/ivpu/ivpu_ipc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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 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(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);