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fbdev: mmp: Annotate struct mmp_path with __counted_by

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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 <deller@gmx.de>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Kees Cook 2023-09-22 10:51:41 -07:00 committed by Helge Deller
parent 053d7dcd34
commit e34872523c
1 changed files with 1 additions and 1 deletions
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2
include/video/mmp_disp.h
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@ -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);