Commit 1539a22e authored by Kees Cook's avatar Kees Cook Committed by Vinod Koul
Browse files

dmaengine: sf-pdma: Annotate struct sf_pdma 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 sf_pdma.

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



Cc: Vinod Koul <vkoul@kernel.org>
Cc: Green Wan <green.wan@sifive.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatar"Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230817235859.49846-9-keescook@chromium.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 04b5433b

drivers/dma/sf-pdma/sf-pdma.h

+1 −1
Original line number Diff line number Diff line
@@ -113,7 +113,7 @@ struct sf_pdma { 
	void __iomem            *membase;

	void __iomem            *mappedbase;

	u32			n_chans;

	struct sf_pdma_chan	chans[];

	struct sf_pdma_chan	chans[] __counted_by(n_chans);

};



#endif /* _SF_PDMA_H */