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dmaengine: fsl-edma: Annotate struct struct fsl_edma_engine with __counted_by

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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>
This commit is contained in:
Kees Cook 2023-10-03 16:27:56 -07:00 • committed by Vinod Koul
parent eb15bd5c2a
commit c223bafdcb
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/fsl-edma-common.h
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@ -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) \