linux-kernel - [PATCH 0/7] wifi: cfg80211: Annotate with __counted

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Message-Id: <20230817211114.never.208-kees@kernel.org>
Date:   Thu, 17 Aug 2023 14:15:22 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     Kees Cook <keescook@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        llvm@...ts.linux.dev, linux-hardening@...r.kernel.org
Subject: [PATCH 0/7] wifi: cfg80211: Annotate with __counted_by

Hi,

This annotates several structures with the coming __counted_by attribute
for bounds checking of flexible arrays at run-time. As a note toward
applicability, had this mitigation been available already, the flaw
fixed in commit 6311071a0562 ("wifi: nl80211: fix integer overflow in
nl80211_parse_mbssid_elems()") would have already been unexploitable
(i.e. writes through an out-of-bounds index would have been blocked).

Thanks!

-Kees

Kees Cook (7):
  wifi: cfg80211: Annotate struct cfg80211_acl_data with __counted_by
  wifi: cfg80211: Annotate struct cfg80211_cqm_config with __counted_by
  wifi: cfg80211: Annotate struct cfg80211_mbssid_elems with
    __counted_by
  wifi: cfg80211: Annotate struct cfg80211_pmsr_request with
    __counted_by
  wifi: cfg80211: Annotate struct cfg80211_rnr_elems with __counted_by
  wifi: cfg80211: Annotate struct cfg80211_scan_request with
    __counted_by
  wifi: cfg80211: Annotate struct cfg80211_tid_config with __counted_by

 include/net/cfg80211.h | 12 ++++++------
 net/wireless/core.h    |  2 +-
 net/wireless/nl80211.c |  7 +++----
 net/wireless/pmsr.c    |  3 +--
 4 files changed, 11 insertions(+), 13 deletions(-)

-- 
2.34.1