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ASoC: apple: mca: Annotate struct mca_data 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 mca_data.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Martin Povišer <povik+lin@cutebit.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: asahi@lists.linux.dev
Cc: alsa-devel@alsa-project.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922175050.work.819-kees@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:50:50 -07:00 committed by Mark Brown
parent 52fee5c915
commit 5982595170
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1 changed files with 1 additions and 1 deletions
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sound/soc/apple/mca.c
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@ -161,7 +161,7 @@ struct mca_data {
struct mutex port_mutex;
int nclusters;
struct mca_cluster clusters[];
struct mca_cluster clusters[] __counted_by(nclusters);
};
static void mca_modify(struct mca_cluster *cl, int regoffset, u32 mask, u32 val)