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authorKees Cook <keescook@chromium.org>2023-08-17 16:58:47 -0700
committerVinod Koul <vkoul@kernel.org>2023-09-28 16:42:14 +0530
commit8360c11aef5775745fc10438e24db95ab2329b1d (patch)
treee85da427fc8694db2810d70eaa3f083a4eed8cde /drivers/dma
parent1539a22e144106eefc0ef05e7b91f68ad20a71ad (diff)
dmaengine: sprd: Annotate struct sprd_dma_dev 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 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>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/sprd-dma.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 97e3dedb6c12..0064a5f4f0cb 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -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);