diff options
| author | Kees Cook | 2023-08-17 14:15:28 -0700 |
|---|---|---|
| committer | Johannes Berg | 2023-08-22 13:18:16 +0200 |
| commit | e3eac9f32ec04112b39e01b574ac739382469bf9 (patch) | |
| tree | b87df81cd0d27da6d47e9c92b2a4f0d42c607e44 /include | |
| parent | 7b6d7087031b69f0694cbef4485616c905664feb (diff) | |
wifi: cfg80211: Annotate struct cfg80211_scan_request 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_scan_request.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.
[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/20230817211531.4193219-6-keescook@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/cfg80211.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 6efe216c01d2..a2afc94a5408 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2544,7 +2544,7 @@ struct cfg80211_scan_request { struct cfg80211_scan_6ghz_params *scan_6ghz_params; /* keep last */ - struct ieee80211_channel *channels[]; + struct ieee80211_channel *channels[] __counted_by(n_channels); }; static inline void get_random_mask_addr(u8 *buf, const u8 *addr, const u8 *mask) |