linux-hardening - Re: [PATCH 00/14] Batch 1: Annotate structs with __counted

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Date: Wed, 27 Sep 2023 08:57:36 -0700
From: Kees Cook <keescook@...omium.org>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Jamal Hadi Salim <jhs@...atatu.com>,
	"David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Martin KaFai Lau <martin.lau@...nel.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Alexei Starovoitov <ast@...nel.org>,
	Yisen Zhuang <yisen.zhuang@...wei.com>,
	Salil Mehta <salil.mehta@...wei.com>,
	Claudiu Manoil <claudiu.manoil@....com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
	Long Li <longli@...rosoft.com>,
	Ajay Sharma <sharmaajay@...rosoft.com>,
	Alex Elder <elder@...nel.org>, Pravin B Shelar <pshelar@....org>,
	Shaokun Zhang <zhangshaokun@...ilicon.com>,
	Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko <jiri@...nulli.us>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Tom Rix <trix@...hat.com>, Simon Horman <horms@...nel.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-hyperv@...r.kernel.org, linux-rdma@...r.kernel.org,
	dev@...nvswitch.org, linux-parisc@...r.kernel.org,
	llvm@...ts.linux.dev, linux-hardening@...r.kernel.org
Subject: Re: [PATCH 00/14] Batch 1: Annotate structs with __counted_by

On Fri, Sep 22, 2023 at 10:28:42AM -0700, Kees Cook wrote:
> This is the batch 1 of patches touching netdev for preparing for
> the coming implementation by GCC and Clang of the __counted_by
> attribute. Flexible array members annotated with __counted_by can have
> their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
> functions).
> 
> As found with Coccinelle[1], add __counted_by to structs that would
> benefit from the annotation.
> 
> Since the element count member must be set before accessing the annotated
> flexible array member, some patches also move the member's initialization
> earlier. (These are noted in the individual patches.)

Hi, just checking on this batch of changes. Is it possible to take the
1-13 subset:

> Kees Cook (14):
>   ipv4: Annotate struct fib_info with __counted_by
>   ipv4/igmp: Annotate struct ip_sf_socklist with __counted_by
>   ipv6: Annotate struct ip6_sf_socklist with __counted_by
>   net: hns: Annotate struct ppe_common_cb with __counted_by
>   net: enetc: Annotate struct enetc_int_vector with __counted_by
>   net: hisilicon: Annotate struct rcb_common_cb with __counted_by
>   net: mana: Annotate struct mana_rxq with __counted_by
>   net: ipa: Annotate struct ipa_power with __counted_by
>   net: mana: Annotate struct hwc_dma_buf with __counted_by
>   net: openvswitch: Annotate struct dp_meter_instance with __counted_by
>   net: enetc: Annotate struct enetc_psfp_gate with __counted_by
>   net: openvswitch: Annotate struct dp_meter with __counted_by
>   net: tulip: Annotate struct mediatable with __counted_by

I'll respin 14 and add it to the next batch:

>   net: sched: Annotate struct tc_pedit with __counted_by

After these 13, there are  32 more patches to various drivers and
protocols...

Thanks!

-Kees

-- 
Kees Cook