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R. Silva" In-Reply-To: <20230817204523.never.034-kees@kernel.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: 1qWk89-001SRk-0L 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]:47346 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 12 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfKSPjzMZFrH0Bd+MDGkdG+PUgDw7mNMrwgZjYJeqT+F0+RF50KtAmUUB4Ma6IgmaGpPnVkHoh7EfghF2cUHOCbEH7rILvL15WU3Rbq4grPP4hnvsNibY pW9ZyaXXwg5Iuh7tKSJmVcd7HERFkoG5UMmuWyXnpsP1G8eClcKMmdApsal73ozzJAQYyYyDc5rZn1vWz5lMMKt4o89xviC7LJHWzLrRzM3vpKjT8ZFXzvud Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/17/23 14:45, 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 rtllib_txb. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Greg Kroah-Hartman > Cc: Philipp Hortmann > Cc: linux-staging@lists.linux.dev > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > drivers/staging/rtl8192e/rtllib.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/rtl8192e/rtllib.h b/drivers/staging/rtl8192e/rtllib.h > index c5a692dfcd17..543d8671281d 100644 > --- a/drivers/staging/rtl8192e/rtllib.h > +++ b/drivers/staging/rtl8192e/rtllib.h > @@ -818,7 +818,7 @@ struct rtllib_txb { > u16 reserved; > __le16 frag_size; > __le16 payload_size; > - struct sk_buff *fragments[]; > + struct sk_buff *fragments[] __counted_by(nr_frags); > }; > > #define MAX_SUBFRAME_COUNT 64