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media: allegro: Annotate struct mcu_msg_push_buffers_internal with __counted_by 

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 mcu_msg_push_buffers_internal.

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

Cc: Michael Tretter <m.tretter@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Kees Cook 2023-09-22 10:49:36 -07:00 committed by Hans Verkuil
parent 61334819ac
commit d425557814
1 changed files with 1 additions and 1 deletions
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2
drivers/media/platform/allegro-dvt/allegro-mail.h
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@ -184,7 +184,7 @@ struct mcu_msg_push_buffers_internal {
struct mcu_msg_header header;
u32 channel_id;
size_t num_buffers;
struct mcu_msg_push_buffers_internal_buffer buffer[];
struct mcu_msg_push_buffers_internal_buffer buffer[] __counted_by(num_buffers);
};
struct mcu_msg_put_stream_buffer {