diff options
| author | Kees Cook <[email protected]> | 2023-09-28 16:43:42 -0700 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2023-10-04 15:12:57 +0530 |
| commit | 74d885711c2f619e92f41ef308691948cc63f224 (patch) | |
| tree | 60f8bb2263b54677f6f60a1b2e2b4a9b1b185a16 | |
| parent | 7af1e0aceeb321cbc90fcf6fa0bec8870290377f (diff) | |
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 <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Tom Rix <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: "Gustavo A. R. Silva" <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
| -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) |