Re: [PATCH] video: fbdev: mmp: Annotate struct mmphw_ctrl with __counted_by
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From: Gustavo A. R. Silva <hidden>
Date: 2023-09-23 17:42:34
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dri-devel, linux-hardening, lkml, llvm
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 <redacted>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks -- Gustavo
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--- drivers/video/fbdev/mmp/hw/mmp_ctrl.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)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)