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dmaengine: sprd: Annotate struct sprd_dma_dev 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 sprd_dma_dev.

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

Cc: Vinod Koul <vkoul@kernel.org>
Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230817235859.49846-10-keescook@chromium.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Kees Cook 2023-08-17 16:58:47 -07:00 committed by Vinod Koul
parent 1539a22e14
commit 8360c11aef
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/sprd-dma.c
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@ -212,7 +212,7 @@ struct sprd_dma_dev {
struct clk *ashb_clk;
int irq;
u32 total_chns;
struct sprd_dma_chn channels[];
struct sprd_dma_chn channels[] __counted_by(total_chns);
};
static void sprd_dma_free_desc(struct virt_dma_desc *vd);