| Message ID | 20230922175137.work.062-kees@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | video: fbdev: mmp: Annotate struct mmphw_ctrl with __counted_by | expand |
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 mmphw_ctrl. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Helge Deller <deller@gmx.de> > Cc: linux-fbdev@vger.kernel.org > Cc: dri-devel@lists.freedesktop.org > Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks
On 9/23/23 18:33, Gustavo A. R. Silva wrote: > 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 mmphw_ctrl. >> >> [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci >> >> Cc: Helge Deller <deller@gmx.de> >> Cc: linux-fbdev@vger.kernel.org >> Cc: dri-devel@lists.freedesktop.org >> Signed-off-by: Kees Cook <keescook@chromium.org> > > Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Both fbdev patches applied to fbdev git tree. Thank you Kees! Helge
diff --git a/drivers/video/fbdev/mmp/hw/mmp_ctrl.h b/drivers/video/fbdev/mmp/hw/mmp_ctrl.h index 167585a889d3..719b99a9bc77 100644 --- a/drivers/video/fbdev/mmp/hw/mmp_ctrl.h +++ b/drivers/video/fbdev/mmp/hw/mmp_ctrl.h @@ -1406,7 +1406,7 @@ struct mmphw_ctrl { /*pathes*/ int path_num; - struct mmphw_path_plat path_plats[]; + struct mmphw_path_plat path_plats[] __counted_by(path_num); }; static inline int overlay_is_vid(struct mmp_overlay *overlay)
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 mmphw_ctrl. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Helge Deller <deller@gmx.de> Cc: linux-fbdev@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/video/fbdev/mmp/hw/mmp_ctrl.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)