dmaengine: st_fdma: Annotate struct st_fdma_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 st_fdma_desc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Vinod Koul <vkoul@kernel.org> Cc: Patrice Chotard <patrice.chotard@foss.st.com> Cc: linux-arm-kernel@lists.infradead.org Cc: dmaengine@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230817235859.49846-11-keescook@chromium.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
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@ -97,7 +97,7 @@ struct st_fdma_desc {
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struct st_fdma_chan *fchan;
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bool iscyclic;
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unsigned int n_nodes;
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struct st_fdma_sw_node node[];
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struct st_fdma_sw_node node[] __counted_by(n_nodes);
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};
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enum st_fdma_type {
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