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 9805FC282E7 for ; Sun, 14 Aug 2022 15:29:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240435AbiHNP3k (ORCPT ); Sun, 14 Aug 2022 11:29:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240291AbiHNP2w (ORCPT ); Sun, 14 Aug 2022 11:28:52 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7EA1CCE16; Sun, 14 Aug 2022 08:28:51 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 1E83F60C13; Sun, 14 Aug 2022 15:28:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 712F2C433C1; Sun, 14 Aug 2022 15:28:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1660490930; bh=cFQps2UgGzKfxxucgJAhHcyTCzeTMbAGguhyK1OacKw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XfpWc4kYYR+WILQB3fg8KYScjSV9u6INV7p1EGtISo5J2OT0u3jcDg8R8SGgZln+7 Ayf1lx87A+GPXsVnCEMMM1KKgz4RokDrLzjW1U6dekKThsbALOBkC8XqcroBvmPBaa lJtdYG1MFyohi6fqOj02Hx1DeCeNJrrnIWwdZHYgJyblg/HDB94DVUHiC9LctNwZJ7 RDVtqrOYbnpfXmpvgdKgbBtHDLghL2KjkTFapSi7emOnRobsx9KdRLFcZ2Gb75HVNZ b2qkwxiYDcE4GtJv8Oy8G13lk347UsCajbJJVUZr0Jrn5lPbiD9wQVS7asV9afV64i nlBAbZTmy73rA== 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 5.19 29/64] scsi: lpfc: Prevent buffer overflow crashes in debugfs with malformed user input Date: Sun, 14 Aug 2022 11:24:02 -0400 Message-Id: <20220814152437.2374207-29-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220814152437.2374207-1-sashal@kernel.org> References: <20220814152437.2374207-1-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: linux-scsi@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 7b24c932e812..25deacc92b02 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