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 nfp_eth_table. Cc: Simon Horman <simon.hor...@corigine.com> Cc: Jakub Kicinski <k...@kernel.org> Cc: "David S. Miller" <da...@davemloft.net> Cc: Eric Dumazet <eduma...@google.com> Cc: Paolo Abeni <pab...@redhat.com> Cc: Yinjun Zhang <yinjun.zh...@corigine.com> Cc: Leon Romanovsky <l...@kernel.org> Cc: Yu Xiao <yu.x...@corigine.com> Cc: Sixiang Chen <sixiang.c...@corigine.com> Cc: oss-driv...@corigine.com Cc: net...@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h index 6e044ac04917..00264af13b49 100644 --- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h +++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.h @@ -241,7 +241,7 @@ struct nfp_eth_table { u64 link_modes_supp[2]; u64 link_modes_ad[2]; - } ports[]; + } ports[] __counted_by(count); }; struct nfp_eth_table *nfp_eth_read_ports(struct nfp_cpp *cpp); -- 2.34.1
