Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH 16/21] dmaengine: tegra210-adma: Annotate struct tegra_adma with __counted_by | Date | Thu, 17 Aug 2023 16:58:53 -0700 |
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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 tegra_adma.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Vinod Koul <vkoul@kernel.org> Cc: Laxman Dewangan <ldewangan@nvidia.com> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: dmaengine@vger.kernel.org Cc: linux-tegra@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/dma/tegra210-adma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c index e557bada1510..cea33912a4c9 100644 --- a/drivers/dma/tegra210-adma.c +++ b/drivers/dma/tegra210-adma.c @@ -162,7 +162,7 @@ struct tegra_adma { const struct tegra_adma_chip_data *cdata; /* Last member of the structure */ - struct tegra_adma_chan channels[]; + struct tegra_adma_chan channels[] __counted_by(nr_channels); }; static inline void tdma_write(struct tegra_adma *tdma, u32 reg, u32 val) -- 2.34.1
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