dmaengine: tegra: Annotate struct tegra_dma_desc with __counted_by
authorKees Cook <keescook@chromium.org>
Thu, 17 Aug 2023 23:58:52 +0000 (16:58 -0700)
committerVinod Koul <vkoul@kernel.org>
Thu, 28 Sep 2023 11:12:15 +0000 (16:42 +0530)
commit32b5e2d7cd14c80de1fa1cdffcc6ec211b615d82
tree73d258b894d7834192a3aa5ac8f9dd1d789c3098
parent7ba0035dc02ce0c877004dc4052c6d5f873539db
dmaengine: tegra: Annotate struct tegra_dma_desc 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 tegra_dma_desc.

[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>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230817235859.49846-15-keescook@chromium.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
drivers/dma/tegra186-gpc-dma.c