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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D3EAC25B06 for ; Sun, 14 Aug 2022 15:43:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241289AbiHNPnM (ORCPT ); Sun, 14 Aug 2022 11:43:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241713AbiHNPmN (ORCPT ); Sun, 14 Aug 2022 11:42:13 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB6DE237C0; Sun, 14 Aug 2022 08:33:34 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9DAD7B80B4D; Sun, 14 Aug 2022 15:33:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 346FCC433B5; Sun, 14 Aug 2022 15:33:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1660491210; bh=CiXBaTcZl+tFw6/d7qenwdQyFhRZj8CcEMPAYDJrwYE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ogb87InBQjN041v11+emtl9mkesz+OC8G+tOc62pqMuqXCjfK31E5jX5D+Tij2tI0 66QF+wOZDPzdu5gtoBwC2N+mWUtV9uXOe57SzM7b4Xr9tC6eHJXc5KvrId75Ls6jcW hImods+DgBIWTWOGRrmtYOZTNR1ja1P7ZbU1Eqb4b14bfuWtcLkCe5TvwLjAjIBaIy 6T1dSAffzacaSzYpyeuJRzdxWPdXBWcYIandaRiPYL+m5tJsYV4TlBplb3gIVsYPtE GffQbZe+Ei0o/a/CUa+Q5b/1GNzkAIqDugxDfH9WwkNBuxKlQB+FwjzfIkRVPQHqfg 3Pz6/AEcjul6Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Smart , Justin Tee , "Martin K . Petersen" , Sasha Levin , james.smart@broadcom.com, dick.kennedy@broadcom.com, jejb@linux.ibm.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 21/46] scsi: lpfc: Prevent buffer overflow crashes in debugfs with malformed user input Date: Sun, 14 Aug 2022 11:32:22 -0400 Message-Id: <20220814153247.2378312-21-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220814153247.2378312-1-sashal@kernel.org> References: <20220814153247.2378312-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: James Smart [ Upstream commit f8191d40aa612981ce897e66cda6a88db8df17bb ] Malformed user input to debugfs results in buffer overflow crashes. Adapt input string lengths to fit within internal buffers, leaving space for NULL terminators. Link: https://lore.kernel.org/r/20220701211425.2708-3-jsmart2021@gmail.com Co-developed-by: Justin Tee Signed-off-by: Justin Tee Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_debugfs.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c index 08b2e85dcd7d..79bc86ba59b3 100644 --- a/drivers/scsi/lpfc/lpfc_debugfs.c +++ b/drivers/scsi/lpfc/lpfc_debugfs.c @@ -2607,8 +2607,8 @@ lpfc_debugfs_multixripools_write(struct file *file, const char __user *buf, struct lpfc_sli4_hdw_queue *qp; struct lpfc_multixri_pool *multixri_pool; - if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1; memset(mybuf, 0, sizeof(mybuf)); @@ -2688,8 +2688,8 @@ lpfc_debugfs_nvmestat_write(struct file *file, const char __user *buf, if (!phba->targetport) return -ENXIO; - if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1; memset(mybuf, 0, sizeof(mybuf)); @@ -2826,8 +2826,8 @@ lpfc_debugfs_ioktime_write(struct file *file, const char __user *buf, char mybuf[64]; char *pbuf; - if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1; memset(mybuf, 0, sizeof(mybuf)); @@ -2954,8 +2954,8 @@ lpfc_debugfs_nvmeio_trc_write(struct file *file, const char __user *buf, char mybuf[64]; char *pbuf; - if (nbytes > 63) - nbytes = 63; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1; memset(mybuf, 0, sizeof(mybuf)); @@ -3060,8 +3060,8 @@ lpfc_debugfs_hdwqstat_write(struct file *file, const char __user *buf, char *pbuf; int i; - if (nbytes > 64) - nbytes = 64; + if (nbytes > sizeof(mybuf) - 1) + nbytes = sizeof(mybuf) - 1; memset(mybuf, 0, sizeof(mybuf)); -- 2.35.1