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| author | Kees Cook <keescook@chromium.org> | 2023-09-29 01:43:42 +0200 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-10-04 11:42:57 +0200 |
| commit | 74d885711c2f619e92f41ef308691948cc63f224 (patch) | |
| tree | 60f8bb2263b54677f6f60a1b2e2b4a9b1b185a16 /drivers/dma | |
| parent | dmaengine: idxd: add wq driver name support for accel-config user tool (diff) | |
| download | linux-74d885711c2f619e92f41ef308691948cc63f224.tar.xz linux-74d885711c2f619e92f41ef308691948cc63f224.zip | |
dmaengine: ep93xx_dma: Annotate struct ep93xx_dma_engine 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 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 ep93xx_dma_engine.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Tom Rix <trix@redhat.com>
Cc: dmaengine@vger.kernel.org
Cc: llvm@lists.linux.dev
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230928234334.work.391-kees@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/ep93xx_dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c index 5c4a448a1254..d6c60635e90d 100644 --- a/drivers/dma/ep93xx_dma.c +++ b/drivers/dma/ep93xx_dma.c @@ -213,7 +213,7 @@ struct ep93xx_dma_engine { #define INTERRUPT_NEXT_BUFFER 2 size_t num_channels; - struct ep93xx_dma_chan channels[]; + struct ep93xx_dma_chan channels[] __counted_by(num_channels); }; static inline struct device *chan2dev(struct ep93xx_dma_chan *edmac) |