On 9/22/23 11:49, 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
mcu_msg_push_buffers_internal.
[1]
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Michael Tretter <m.tret...@pengutronix.de>
Cc: Pengutronix Kernel Team <ker...@pengutronix.de>
Cc: Mauro Carvalho Chehab <mche...@kernel.org>
Cc: linux-me...@vger.kernel.org
Signed-off-by: Kees Cook <keesc...@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavo...@kernel.org>
Thanks
--
Gustavo
---
drivers/media/platform/allegro-dvt/allegro-mail.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/allegro-dvt/allegro-mail.h
b/drivers/media/platform/allegro-dvt/allegro-mail.h
index a5686058d754..c0c9013f1aab 100644
--- a/drivers/media/platform/allegro-dvt/allegro-mail.h
+++ b/drivers/media/platform/allegro-dvt/allegro-mail.h
@@ -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 {
