From: Kees Cook Date: Tue, 3 Oct 2023 23:27:56 +0000 (-0700) Subject: dmaengine: fsl-edma: Annotate struct struct fsl_edma_engine with __counted_by X-Git-Tag: v6.7-rc1~73^2~19 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c223bafdcbd51506df00509088efc62e08ef6c3f;p=thirdparty%2Fkernel%2Flinux.git 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 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 Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20231003232704.work.596-kees@kernel.org Signed-off-by: Vinod Koul --- 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) \