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dmaengine: sf-pdma: Annotate struct sf_pdma 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 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: Kees Cook <keescook@chromium.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230817235859.49846-9-keescook@chromium.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Kees Cook 2023-08-17 16:58:46 -07:00 committed by Vinod Koul
parent 04b5433b8c
commit 1539a22e14
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/sf-pdma/sf-pdma.h
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@ -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 */