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| author | Kees Cook <keescook@chromium.org> | 2023-10-03 16:27:56 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-10-04 12:51:02 +0530 |
| commit | c223bafdcbd51506df00509088efc62e08ef6c3f (patch) | |
| tree | 02673c71787be56fea4de10ce0995cccf9632649 /drivers/dma | |
| parent | eb15bd5c2a690a84eb998140f99b2b660b4c8e7d (diff) | |
| download | linux-c223bafdcbd51506df00509088efc62e08ef6c3f.tar.gz | |
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.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h index 3cc0cc8fc2d05..2b55c2e399f91 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) \ |