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authorKees Cook <keescook@chromium.org>2023-10-03 16:27:56 -0700
committerVinod Koul <vkoul@kernel.org>2023-10-04 12:51:02 +0530
commitc223bafdcbd51506df00509088efc62e08ef6c3f (patch)
tree02673c71787be56fea4de10ce0995cccf9632649 /drivers/dma
parenteb15bd5c2a690a84eb998140f99b2b660b4c8e7d (diff)
dmaengine: fsl-edma: Annotate struct struct fsl_edma_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 struct fsl_edma_engine. Cc: Vinod Koul <vkoul@kernel.org> Cc: dmaengine@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20231003232704.work.596-kees@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/fsl-edma-common.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
index 3cc0cc8fc2d0..2b55c2e399f9 100644
--- a/drivers/dma/fsl-edma-common.h
+++ b/drivers/dma/fsl-edma-common.h
@@ -213,7 +213,7 @@ struct fsl_edma_engine {
bool big_endian;
struct edma_regs regs;
u64 chan_masked;
- struct fsl_edma_chan chans[];
+ struct fsl_edma_chan chans[] __counted_by(n_chans);
};
#define edma_read_tcdreg(chan, __name) \