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Message-Id: <20230817211531.4193219-7-keescook@chromium.org> Date: Thu, 17 Aug 2023 14:15:29 -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>, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, linux-hardening@...r.kernel.org Subject: [PATCH 7/7] wifi: cfg80211: Annotate struct cfg80211_tid_config with __counted_by Prepare 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 for struct cfg80211_tid_config. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Johannes Berg <johannes@...solutions.net> Cc: "David S. Miller" <davem@...emloft.net> Cc: Eric Dumazet <edumazet@...gle.com> Cc: Jakub Kicinski <kuba@...nel.org> Cc: Paolo Abeni <pabeni@...hat.com> Cc: linux-wireless@...r.kernel.org Cc: netdev@...r.kernel.org Signed-off-by: Kees Cook <keescook@...omium.org> --- include/net/cfg80211.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index a2afc94a5408..423fe9b85cb0 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -811,7 +811,7 @@ struct cfg80211_tid_cfg { struct cfg80211_tid_config { const u8 *peer; u32 n_tid_conf; - struct cfg80211_tid_cfg tid_conf[]; + struct cfg80211_tid_cfg tid_conf[] __counted_by(n_tid_conf); }; /** -- 2.34.1
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