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 dp_meter_instance. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Pravin B Shelar <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Eric Dumazet <[email protected]> Cc: Jakub Kicinski <[email protected]> Cc: Paolo Abeni <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Kees Cook <[email protected]> --- net/openvswitch/meter.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/openvswitch/meter.h b/net/openvswitch/meter.h index 0c33889a8515..013de694221f 100644 --- a/net/openvswitch/meter.h +++ b/net/openvswitch/meter.h @@ -45,7 +45,7 @@ struct dp_meter { struct dp_meter_instance { struct rcu_head rcu; u32 n_meters; - struct dp_meter __rcu *dp_meters[]; + struct dp_meter __rcu *dp_meters[] __counted_by(n_meters); }; struct dp_meter_table { -- 2.34.1
