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R. Silva" In-Reply-To: <20230922175141.work.450-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: 94.239.20.48 X-Source-L: No X-Exim-ID: 1qjy3s-003bcu-2i X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: ([192.168.1.98]) [94.239.20.48]:58218 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 0 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfAg1o1m1slACG/5MiR22o/lfKiMf1eXt4tBJ7+At16soq6acAFNQbeKijHAMUkSOiUJfxhzeFb8lP530gr+De8qTCMBNBEBRMg3Qm00ieDOq87Tb/lhU mi84RPQjlgW9MWfZxdRiRVleltxUNPsLBbuEvg/mWdk69qeONyM8QzE8wYsP645mvsb/7p4YY1x1wrcJQRNhceRz41CL0JXzOyNTiGaXmG1TTm6/gZh5kBvt RRy3Kv1ynklXW5EH2bixdDS1URsfCz1RFSK/kkFTtcqCg+4dagWLna5XB+4MB1r2qDBEqJwWfsuwbYaY9fR4zA== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/22/23 11:51, 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 mmp_path. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Helge Deller > Cc: linux-fbdev@vger.kernel.org > Cc: dri-devel@lists.freedesktop.org > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > include/video/mmp_disp.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/video/mmp_disp.h b/include/video/mmp_disp.h > index 77252cb46361..a722dcbf5073 100644 > --- a/include/video/mmp_disp.h > +++ b/include/video/mmp_disp.h > @@ -231,7 +231,7 @@ struct mmp_path { > > /* layers */ > int overlay_num; > - struct mmp_overlay overlays[]; > + struct mmp_overlay overlays[] __counted_by(overlay_num); > }; > > extern struct mmp_path *mmp_get_path(const char *name);