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 mana_rxq. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx> Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Cc: Wei Liu <wei.liu@xxxxxxxxxx> Cc: Dexuan Cui <decui@xxxxxxxxxxxxx> Cc: Long Li <longli@xxxxxxxxxxxxx> Cc: Ajay Sharma <sharmaajay@xxxxxxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Eric Dumazet <edumazet@xxxxxxxxxx> Cc: Jakub Kicinski <kuba@xxxxxxxxxx> Cc: Paolo Abeni <pabeni@xxxxxxxxxx> Cc: linux-hyperv@xxxxxxxxxxxxxxx Cc: linux-rdma@xxxxxxxxxxxxxxx Cc: netdev@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- include/net/mana/mana.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index 9f70b4332238..38441be68592 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -338,7 +338,7 @@ struct mana_rxq { /* MUST BE THE LAST MEMBER: * Each receive buffer has an associated mana_recv_buf_oob. */ - struct mana_recv_buf_oob rx_oobs[]; + struct mana_recv_buf_oob rx_oobs[] __counted_by(num_rx_buf); }; struct mana_tx_qp { -- 2.34.1
