From patchwork Thu Jul 13 02:37:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Polaris Pi X-Patchwork-Id: 703191 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 C2A2DEB64DA for ; Thu, 13 Jul 2023 02:38:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233631AbjGMCh7 (ORCPT ); Wed, 12 Jul 2023 22:37:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233627AbjGMCh6 (ORCPT ); Wed, 12 Jul 2023 22:37:58 -0400 Received: from mail-oi1-x232.google.com (mail-oi1-x232.google.com [IPv6:2607:f8b0:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B200211F; Wed, 12 Jul 2023 19:37:45 -0700 (PDT) Received: by mail-oi1-x232.google.com with SMTP id 5614622812f47-3a1ebb79579so220176b6e.3; Wed, 12 Jul 2023 19:37:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1689215864; x=1691807864; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=vduQ3kkF6+9LmbpyzrWUTpYlu5cuK+oeQp8QiLQyx9c=; b=NNs1KVqjl2RZ7Rh0yiNv62nzhr/EH0ThqGellMU9EUvBSasusY+TdzYq2rqxkI5L9Z pfc5oHrSbMDGugxXVCFTGGbyK1JFIQADvs2hl5I5OwFffHTCY8eVm+jYGomjjnfP0EZP SPVGY1Jz1lnrsprPEZTJZzByj96xA6fFP//LCq5IoKv3fXhE7QdDSyeKc9p6Y77f6O8n Xeea9DtU+JKh6zlu72wSqn+ZNtnXnouhhZKAotLPY3pDvEQ4eCLj7m9AJ163PTuL/z0u aOfFCDiO1P6Dm7wUf8nJZQNND56ScZlxY0TnPHNLzG8t1vCsscqZP9VP+l+4aApCR2Mu DTtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689215864; x=1691807864; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=vduQ3kkF6+9LmbpyzrWUTpYlu5cuK+oeQp8QiLQyx9c=; b=E2ULzJ/MkYwBRC6S/mUxdbprBVyW0zJxdxDOx0D+05ivjc3v2O+TcW3JSk9/GFrVyN SKdXfdY1JRGUlCxZLBuoQoUq74tPuHnYGzSQadWfOQbgCaJF+ZoJEdi/6sppYtTDQXSz S1ALWfzyKERROAZaTsqfhLOEzsi8QXZ1Wb+t9rLO8X8qLXRCWesQ2qc+kVO18Iiz4D4J UJAtrqJ25WTBfG5PpMRC0o7lql9SDD4f5KyyD9Jfnp2OKYo08n5JtNIadWivcI3wd+IA MiGg9EajC2dguJy6E35TlRCr37iplq02U7EpbsstLoszQLZ9PTJUDdKxHvnyw48OXhUD i3NQ== X-Gm-Message-State: ABy/qLa6AtaBrT31ETzZs4V9icit4mX+0gENADqFD4tF3xATWfCxfk7Q 2KxlWdk8ZL3ZNgnBGaWo1F1jK9Wb4lNFjtnQ X-Google-Smtp-Source: APBJJlFx8O9/XOGVBIPOcHRYVQ/yBszXHyLoyCBGcG8ZkvainhaeT7unU2YD37GoBnd7F3N9vgAWjQ== X-Received: by 2002:a05:6808:1490:b0:3a3:7adc:dec7 with SMTP id e16-20020a056808149000b003a37adcdec7mr419369oiw.38.1689215864298; Wed, 12 Jul 2023 19:37:44 -0700 (PDT) Received: from localhost.localdomain ([221.231.171.18]) by smtp.gmail.com with ESMTPSA id 6-20020aa79106000000b00662c4ca18ebsm4228783pfh.128.2023.07.12.19.37.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jul 2023 19:37:43 -0700 (PDT) From: pinkperfect To: kuba@kernel.org, amitkarwar@gmail.com, kvalo@kernel.org, ganapathi017@gmail.com, sharvari.harisangam@nxp.com, huxinming820@gmail.com Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, pinkperfect Subject: [PATCH v3] wifi: mwifiex: Fix OOB and integer underflow when rx packets Date: Thu, 13 Jul 2023 02:37:31 +0000 Message-Id: <20230713023731.2518507-1-pinkperfect2021@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Make sure mwifiex_process_mgmt_packet and its callers mwifiex_process_sta_rx_packet and mwifiex_process_uap_rx_packet not out-of-bounds access the skb->data buffer. Fixes: 2dbaf751b1de ("mwifiex: report received management frames to cfg80211") Signed-off-by: pinkperfect --- drivers/net/wireless/marvell/mwifiex/sta_rx.c | 3 ++- drivers/net/wireless/marvell/mwifiex/uap_txrx.c | 10 +++------- drivers/net/wireless/marvell/mwifiex/util.c | 5 +++++ 3 files changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/marvell/mwifiex/sta_rx.c b/drivers/net/wireless/marvell/mwifiex/sta_rx.c index 13659b02ba88..88aaec645291 100644 --- a/drivers/net/wireless/marvell/mwifiex/sta_rx.c +++ b/drivers/net/wireless/marvell/mwifiex/sta_rx.c @@ -194,7 +194,8 @@ int mwifiex_process_sta_rx_packet(struct mwifiex_private *priv, rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_offset; - if ((rx_pkt_offset + rx_pkt_length) > (u16) skb->len) { + if ((rx_pkt_offset + rx_pkt_length) > (u16)skb->len || + skb->len - rx_pkt_offset < sizeof(*rx_pkt_hdr)) { mwifiex_dbg(adapter, ERROR, "wrong rx packet: len=%d, rx_pkt_offset=%d, rx_pkt_length=%d\n", skb->len, rx_pkt_offset, rx_pkt_length); diff --git a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c index e495f7eaea03..f84ed22518c6 100644 --- a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c +++ b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c @@ -367,20 +367,15 @@ int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv, rx_pkt_type = le16_to_cpu(uap_rx_pd->rx_pkt_type); rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset); - ether_addr_copy(ta, rx_pkt_hdr->eth803_hdr.h_source); - if ((le16_to_cpu(uap_rx_pd->rx_pkt_offset) + - le16_to_cpu(uap_rx_pd->rx_pkt_length)) > (u16) skb->len) { + le16_to_cpu(uap_rx_pd->rx_pkt_length)) > (u16)skb->len || + skb->len - le16_to_cpu(uap_rx_pd->rx_pkt_offset) < sizeof(*rx_pkt_hdr)) { mwifiex_dbg(adapter, ERROR, "wrong rx packet: len=%d, offset=%d, length=%d\n", skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset), le16_to_cpu(uap_rx_pd->rx_pkt_length)); priv->stats.rx_dropped++; - node = mwifiex_get_sta_entry(priv, ta); - if (node) - node->stats.tx_failed++; - dev_kfree_skb_any(skb); return 0; } @@ -393,6 +388,7 @@ int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv, return ret; } + ether_addr_copy(ta, rx_pkt_hdr->eth803_hdr.h_source); if (rx_pkt_type != PKT_TYPE_BAR && uap_rx_pd->priority < MAX_NUM_TID) { spin_lock_bh(&priv->sta_list_spinlock); diff --git a/drivers/net/wireless/marvell/mwifiex/util.c b/drivers/net/wireless/marvell/mwifiex/util.c index 94c2d219835d..31e1a82883e4 100644 --- a/drivers/net/wireless/marvell/mwifiex/util.c +++ b/drivers/net/wireless/marvell/mwifiex/util.c @@ -399,6 +399,11 @@ mwifiex_process_mgmt_packet(struct mwifiex_private *priv, pkt_len = le16_to_cpu(rx_pd->rx_pkt_length); + if (pkt_len < sizeof(struct ieee80211_hdr) || skb->len < pkt_len) { + mwifiex_dbg(priv->adapter, ERROR, "invalid rx_pkt_length"); + return -1; + } + ieee_hdr = (void *)skb->data; if (ieee80211_is_mgmt(ieee_hdr->frame_control)) { if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,