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 <[email protected]> Cc: Jakub Kicinski <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Eric Dumazet <[email protected]> Cc: Paolo Abeni <[email protected]> Cc: Yinjun Zhang <[email protected]> Cc: Leon Romanovsky <[email protected]> Cc: Yu Xiao <[email protected]> Cc: Sixiang Chen <[email protected]> Cc: [email protected] Cc: [email protected] Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <[email protected]> --- 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
