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wifi: cfg80211: Annotate struct cfg80211_tid_config with __counted_by

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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@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20230817211531.4193219-7-keescook@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Kees Cook 2023-08-17 14:15:29 -07:00 committed by Johannes Berg
parent e3eac9f32e
commit 545d3523df
1 changed files with 1 additions and 1 deletions
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2
include/net/cfg80211.h
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@ -811,7 +811,7 @@ struct cfg80211_tid_cfg {
struct cfg80211_tid_config { struct cfg80211_tid_config {
const u8 *peer; const u8 *peer;
u32 n_tid_conf; u32 n_tid_conf;
struct cfg80211_tid_cfg tid_conf[]; struct cfg80211_tid_cfg tid_conf[] __counted_by(n_tid_conf);
}; };
/** /**