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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org References: <20230817211114.never.208-kees@kernel.org> <20230817211531.4193219-7-keescook@chromium.org> From: "Gustavo A. R. Silva" In-Reply-To: <20230817211531.4193219-7-keescook@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 187.162.21.192 X-Source-L: No X-Exim-ID: 1qWkT0-001ldl-27 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 187-162-21-192.static.axtel.net ([192.168.15.8]) [187.162.21.192]:59978 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 132 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfIYd2yRTrzLkukRQGa5hBblVoD5b9tkXbw57AexMcB+f4a5hO1kGGhG7OpmXHLPVupfCgnMiM8VJIelsMB9dRzPPIFxCBGhHIciji1P/gVyrGLlf0VLs H/UccBXLO61200b3aMqkezWeIPRknx40S9mPKHpfMI1U8sH102nzD5axrq1syLdK6A9l3pOZB17ggd96G3GKCsPhHdwSesYJRsGQ/tE570h/PtV3X7i8JhvF Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org On 8/17/23 15:15, Kees Cook wrote: > 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 > Cc: "David S. Miller" > Cc: Eric Dumazet > Cc: Jakub Kicinski > Cc: Paolo Abeni > Cc: linux-wireless@vger.kernel.org > Cc: netdev@vger.kernel.org > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > 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); > }; > > /**