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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22CCCC433F5 for ; Mon, 4 Oct 2021 13:00:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 083C16124C for ; Mon, 4 Oct 2021 13:00:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234743AbhJDNCH (ORCPT ); Mon, 4 Oct 2021 09:02:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:60266 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234331AbhJDNA1 (ORCPT ); Mon, 4 Oct 2021 09:00:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3CE00613C8; Mon, 4 Oct 2021 12:57:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1633352278; bh=ZMFTrj+G1zzL9POirBeOmm9akaZ2DUSRVUlKBDsS6DA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BsYlObfSfRiizy6oOuZSGcJZXs62bL6ogMfJLxFBchyXz+873iLrsdWNNkylUHlY1 xAjE01tuzt6xfAAgMJdDUhTBfl3ltVM637nnLUftRDlqjf7g2pvQhZgej2J3Bjbyi+ xsPBnzKHuF+/cEusPsK0ImX3O2FzTwe/QFbISb4U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Samuel Iglesias Gonsalvez , Johan Hovold Subject: [PATCH 4.9 44/57] ipack: ipoctal: fix missing allocation-failure check Date: Mon, 4 Oct 2021 14:52:28 +0200 Message-Id: <20211004125030.347305488@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211004125028.940212411@linuxfoundation.org> References: <20211004125028.940212411@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Johan Hovold commit 445c8132727728dc297492a7d9fc074af3e94ba3 upstream. Add the missing error handling when allocating the transmit buffer to avoid dereferencing a NULL pointer in write() should the allocation ever fail. Fixes: ba4dc61fe8c5 ("Staging: ipack: add support for IP-OCTAL mezzanine board") Cc: stable@vger.kernel.org # 3.5 Acked-by: Samuel Iglesias Gonsalvez Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20210917114622.5412-5-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/ipack/devices/ipoctal.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -391,7 +391,9 @@ static int ipoctal_inst_slot(struct ipoc channel = &ipoctal->channel[i]; tty_port_init(&channel->tty_port); - tty_port_alloc_xmit_buf(&channel->tty_port); + res = tty_port_alloc_xmit_buf(&channel->tty_port); + if (res) + continue; channel->tty_port.ops = &ipoctal_tty_port_ops; ipoctal_reset_stats(&channel->stats);