[v2,15/63] intersil: Use struct_group() for memcpy() region

Message ID	20210818060533.3569517-16-keescook@chromium.org
State	New
Headers	show Return-Path: <netdev-owner@kernel.org> From: Kees Cook <keescook@chromium.org> To: linux-kernel@vger.kernel.org Cc: Kees Cook <keescook@chromium.org>, Jouni Malinen <j@w1.fi>, Kalle Valo <kvalo@codeaurora.org>, "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, Lee Jones <lee.jones@linaro.org>, Allen Pais <allen.lkml@gmail.com>, Romain Perier <romain.perier@gmail.com>, Arnd Bergmann <arnd@arndb.de>, Vaibhav Gupta <vaibhavgupta40@gmail.com>, Cong Wang <xiyou.wangcong@gmail.com>, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, "Gustavo A. R. Silva" <gustavoars@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Andrew Morton <akpm@linux-foundation.org>, dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com, Rasmus Villemoes <linux@rasmusvillemoes.dk>, linux-hardening@vger.kernel.org Subject: [PATCH v2 15/63] intersil: Use struct_group() for memcpy() region Date: Tue, 17 Aug 2021 23:04:45 -0700 Message-Id: <20210818060533.3569517-16-keescook@chromium.org> In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org> References: <20210818060533.3569517-1-keescook@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Introduce strict memcpy() bounds checking \| expand [v2,00/63] Introduce strict memcpy() bounds checking [v2,01/63] ipw2x00: Avoid field-overflowing memcpy() [v2,02/63] net/mlx5e: Avoid field-overflowing memcpy() [v2,03/63] rpmsg: glink: Replace strncpy() with strscpy_pad() [v2,04/63] pcmcia: ray_cs: Split memcpy() to avoid bounds check warning [v2,05/63] stddef: Introduce struct_group() helper macro [v2,06/63] cxl/core: Replace unions with struct_group() [v2,07/63] skbuff: Switch structure bounds to struct_group() [v2,08/63] bnxt_en: Use struct_group_attr() for memcpy() region [v2,09/63] mwl8k: Use struct_group() for memcpy() region [v2,10/63] libertas: Use struct_group() for memcpy() region [v2,11/63] libertas_tf: Use struct_group() for memcpy() region [v2,12/63] thermal: intel: int340x_thermal: Use struct_group() for memcpy() region [v2,13/63] iommu/amd: Use struct_group() for memcpy() region [v2,14/63] cxgb3: Use struct_group() for memcpy() region [v2,15/63] intersil: Use struct_group() for memcpy() region [v2,16/63] cxgb4: Use struct_group() for memcpy() region [v2,17/63] bnx2x: Use struct_group() for memcpy() region [v2,18/63] drm/amd/pm: Use struct_group() for memcpy() region [v2,19/63] staging: wlan-ng: Use struct_group() for memcpy() region [v2,20/63] drm/mga/mga_ioc32: Use struct_group() for memcpy() region [v2,21/63] net/mlx5e: Use struct_group() for memcpy() region [v2,22/63] HID: cp2112: Use struct_group() for memcpy() region [v2,23/63] media: omap3isp: Use struct_group() for memcpy() region [v2,24/63] sata_fsl: Use struct_group() for memcpy() region [v2,25/63] compiler_types.h: Remove __compiletime_object_size() [v2,26/63] lib/string: Move helper functions out of string.c [v2,27/63] fortify: Move remaining fortify helpers into fortify-string.h [v2,28/63] fortify: Explicitly disable Clang support [v2,29/63] fortify: Fix dropped strcpy() compile-time write overflow check [v2,30/63] fortify: Prepare to improve strnlen() and strlen() warnings [v2,31/63] fortify: Allow strlen() and strnlen() to pass compile-time known lengths [v2,32/63] fortify: Add compile-time FORTIFY_SOURCE tests [v2,33/63] lib: Introduce CONFIG_TEST_MEMCPY [v2,34/63] fortify: Detect struct member overflows in memcpy() at compile-time [v2,35/63] fortify: Detect struct member overflows in memmove() at compile-time [v2,36/63] scsi: ibmvscsi: Avoid multi-field memset() overflow by aiming at srp [v2,37/63] string.h: Introduce memset_after() for wiping trailing members/padding [v2,38/63] xfrm: Use memset_after() to clear padding [v2,39/63] ipv6: Use memset_after() to zero rt6_info [v2,40/63] netfilter: conntrack: Use memset_startat() to zero struct nf_conn [v2,41/63] net: 802: Use memset_startat() to clear struct fields [v2,42/63] net: dccp: Use memset_startat() for TP zeroing [v2,43/63] net: qede: Use memset_startat() for counters [v2,44/63] mac80211: Use memset_after() to clear tx status [v2,45/63] ath11k: Use memset_startat() for clearing queue descriptors [v2,46/63] iw_cxgb4: Use memset_startat() for cpl_t5_pass_accept_rpl [v2,47/63] intel_th: msu: Use memset_startat() for clearing hw header [v2,48/63] IB/mthca: Use memset_startat() for clearing mpt_entry [v2,49/63] btrfs: Use memset_startat() to clear end of struct [v2,50/63] tracing: Use memset_startat() to zero struct trace_iterator [v2,51/63] drbd: Use struct_group() to zero algs [v2,52/63] cm4000_cs: Use struct_group() to zero struct cm4000_dev region [v2,53/63] KVM: x86: Use struct_group() to zero decode cache [v2,54/63] dm integrity: Use struct_group() to zero struct journal_sector [v2,55/63] HID: roccat: Use struct_group() to zero kone_mouse_event [v2,56/63] RDMA/mlx5: Use struct_group() to zero struct mlx5_ib_mr [v2,57/63] powerpc/signal32: Use struct_group() to zero spe regs [v2,58/63] ethtool: stats: Use struct_group() to clear all stats at once [v2,59/63] can: flexcan: Use struct_group() to zero struct flexcan_regs regions [v2,60/63] net/af_iucv: Use struct_group() to zero struct iucv_sock region [v2,61/63] powerpc: Split memset() to avoid multi-field overflow [v2,62/63] fortify: Detect struct member overflows in memset() at compile-time [v2,63/63] fortify: Work around Clang inlining bugs

Message ID

20210818060533.3569517-16-keescook@chromium.org

State

New

Headers

From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>, Jouni Malinen <j@w1.fi>,
	Kalle Valo <kvalo@codeaurora.org>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Lee Jones <lee.jones@linaro.org>,
	Allen Pais <allen.lkml@gmail.com>,
	Romain Perier <romain.perier@gmail.com>, Arnd Bergmann <arnd@arndb.de>,
	Vaibhav Gupta <vaibhavgupta40@gmail.com>,
	Cong Wang <xiyou.wangcong@gmail.com>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev,
	linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org,
	clang-built-linux@googlegroups.com,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	linux-hardening@vger.kernel.org
Subject: [PATCH v2 15/63] intersil: Use struct_group() for memcpy() region
Date: Tue, 17 Aug 2021 23:04:45 -0700
Message-Id: <20210818060533.3569517-16-keescook@chromium.org>
In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org>
References: <20210818060533.3569517-1-keescook@chromium.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

Introduce strict memcpy() bounds checking | expand

Commit Message

Kees Cook Aug. 18, 2021, 6:04 a.m. UTC

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally writing across neighboring fields.

Use struct_group() in struct hfa384x_tx_frame around members
frame_control, duration_id, addr1, addr2, addr3, and seq_ctrl, so they
can be referenced together. This will allow memcpy() and sizeof() to
more easily reason about sizes, improve readability, and avoid future
warnings about writing beyond the end of frame_control.

"pahole" shows no size nor member offset changes to struct
hfa384x_tx_frame. "objdump -d" shows no object code changes.

Cc: Jouni Malinen <j@w1.fi>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Allen Pais <allen.lkml@gmail.com>
Cc: Romain Perier <romain.perier@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Vaibhav Gupta <vaibhavgupta40@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 drivers/net/wireless/intersil/hostap/hostap_hw.c   |  5 +++--
 drivers/net/wireless/intersil/hostap/hostap_wlan.h | 14 ++++++++------
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/intersil/hostap/hostap_hw.c b/drivers/net/wireless/intersil/hostap/hostap_hw.c
index 9a19046217df..cea8a9ddc4da 100644
--- a/drivers/net/wireless/intersil/hostap/hostap_hw.c
+++ b/drivers/net/wireless/intersil/hostap/hostap_hw.c
@@ -1812,8 +1812,9 @@  static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev)
 	memset(&txdesc, 0, sizeof(txdesc));
 
 	/* skb->data starts with txdesc->frame_control */
-	hdr_len = 24;
-	skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len);
+	hdr_len = sizeof(txdesc.frame);
+	BUILD_BUG_ON(hdr_len != 24);
+	skb_copy_from_linear_data(skb, &txdesc.frame, hdr_len);
 	if (ieee80211_is_data(txdesc.frame_control) &&
 	    ieee80211_has_a4(txdesc.frame_control) &&
 	    skb->len >= 30) {
diff --git a/drivers/net/wireless/intersil/hostap/hostap_wlan.h b/drivers/net/wireless/intersil/hostap/hostap_wlan.h
index dd2603d9b5d3..174735a137c5 100644
--- a/drivers/net/wireless/intersil/hostap/hostap_wlan.h
+++ b/drivers/net/wireless/intersil/hostap/hostap_wlan.h
@@ -115,12 +115,14 @@  struct hfa384x_tx_frame {
 	__le16 tx_control; /* HFA384X_TX_CTRL_ flags */
 
 	/* 802.11 */
-	__le16 frame_control; /* parts not used */
-	__le16 duration_id;
-	u8 addr1[ETH_ALEN];
-	u8 addr2[ETH_ALEN]; /* filled by firmware */
-	u8 addr3[ETH_ALEN];
-	__le16 seq_ctrl; /* filled by firmware */
+	struct_group(frame,
+		__le16 frame_control; /* parts not used */
+		__le16 duration_id;
+		u8 addr1[ETH_ALEN];
+		u8 addr2[ETH_ALEN]; /* filled by firmware */
+		u8 addr3[ETH_ALEN];
+		__le16 seq_ctrl; /* filled by firmware */
+	);
 	u8 addr4[ETH_ALEN];
 	__le16 data_len;

[v2,15/63] intersil: Use struct_group() for memcpy() region

Commit Message

Patch