diff options
| author | Kees Cook <keescook@chromium.org> | 2023-08-17 16:58:52 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-09-28 16:42:15 +0530 |
| commit | 32b5e2d7cd14c80de1fa1cdffcc6ec211b615d82 (patch) | |
| tree | 73d258b894d7834192a3aa5ac8f9dd1d789c3098 /drivers/dma | |
| parent | 7ba0035dc02ce0c877004dc4052c6d5f873539db (diff) | |
| download | lwn-32b5e2d7cd14c80de1fa1cdffcc6ec211b615d82.tar.gz lwn-32b5e2d7cd14c80de1fa1cdffcc6ec211b615d82.zip | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/tegra186-gpc-dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index 868c18cc72b1..fa4d4142a68a 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -221,7 +221,7 @@ struct tegra_dma_desc { unsigned int sg_count; struct virt_dma_desc vd; struct tegra_dma_channel *tdc; - struct tegra_dma_sg_req sg_req[]; + struct tegra_dma_sg_req sg_req[] __counted_by(sg_count); }; /* |