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authorKees Cook <keescook@chromium.org>2023-08-18 02:58:39 +0300
committerVinod Koul <vkoul@kernel.org>2023-09-28 14:12:02 +0300
commit81cd3cb3b3dd37df1fc45c5b6443a07bc2a7fee4 (patch)
treeecb12901e1c8de56e1473067ea0173c32eb3a710 /drivers/dma/at_hdmac.c
parent83c5d35bf9112577da097c1b4fbfedef93b951e6 (diff)
downloadlinux-81cd3cb3b3dd37df1fc45c5b6443a07bc2a7fee4.tar.xz
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>
Diffstat (limited to 'drivers/dma/at_hdmac.c')
-rw-r--r--drivers/dma/at_hdmac.c2
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 --------------------------------------------------------*/