From: Kees Cook Date: Thu, 17 Aug 2023 23:58:54 +0000 (-0700) Subject: dmaengine: ti: edma: Annotate struct edma_desc with __counted_by X-Git-Tag: v6.7-rc1~73^2~28 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f240e0cdbcb0cc60d6a75ea7d492ce93b7fd52e;p=thirdparty%2Fkernel%2Flinux.git dmaengine: ti: edma: Annotate struct edma_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 edma_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul Cc: Peter Ujfalusi Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230817235859.49846-17-keescook@chromium.org Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c index 3ed022918ec06..fe06288e034bb 100644 --- a/drivers/dma/ti/edma.c +++ b/drivers/dma/ti/edma.c @@ -202,7 +202,7 @@ struct edma_desc { u32 residue; u32 residue_stat; - struct edma_pset pset[]; + struct edma_pset pset[] __counted_by(pset_nr); }; struct edma_cc;