diff options
| author | Kees Cook <keescook@chromium.org> | 2023-08-17 16:58:39 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-09-28 16:42:02 +0530 |
| commit | 81cd3cb3b3dd37df1fc45c5b6443a07bc2a7fee4 (patch) | |
| tree | ecb12901e1c8de56e1473067ea0173c32eb3a710 | |
| parent | 83c5d35bf9112577da097c1b4fbfedef93b951e6 (diff) | |
dmaengine: at_hdmac: Annotate struct at_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 at_desc.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Tudor Ambarus <tudor.ambarus@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: dmaengine@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230817235859.49846-2-keescook@chromium.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/at_hdmac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 417a9428a9b6..fb89ecbf0cc5 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -239,7 +239,7 @@ struct at_desc { bool memset_buffer; dma_addr_t memset_paddr; int *memset_vaddr; - struct atdma_sg sg[]; + struct atdma_sg sg[] __counted_by(sglen); }; /*-- Channels --------------------------------------------------------*/ |