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dmaengine: uniphier-xdmac: Annotate struct uniphier_xdmac_device 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 uniphier_xdmac_device.

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

Cc: Vinod Koul <vkoul@kernel.org>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: dmaengine@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230817235859.49846-20-keescook@chromium.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Kees Cook 2023-08-17 16:58:57 -07:00 committed by Vinod Koul
parent 5a67a8f93f
commit 7935de861a
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/uniphier-xdmac.c
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@ -97,7 +97,7 @@ struct uniphier_xdmac_device {
struct dma_device ddev;
void __iomem *reg_base;
int nr_chans;
struct uniphier_xdmac_chan channels[];
struct uniphier_xdmac_chan channels[] __counted_by(nr_chans);
};
static struct uniphier_xdmac_chan *