Instead of having a mismatch between the requested allocation size and the actual kmalloc bucket size, which is examined later via ksize(), round up proactively so the allocation is explicitly made for the full size, allowing the compiler to correctly reason about the resulting size of the buffer through the existing __alloc_size() hint. Cc: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx> Cc: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> Cc: Eric Dumazet <edumazet@xxxxxxxxxx> Cc: Jakub Kicinski <kuba@xxxxxxxxxx> Cc: Paolo Abeni <pabeni@xxxxxxxxxx> Cc: intel-wired-lan@xxxxxxxxxxxxxxxx Cc: netdev@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- drivers/net/ethernet/intel/igb/igb_main.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 2796e81d2726..4d70ee5b0f79 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -1196,6 +1196,7 @@ static int igb_alloc_q_vector(struct igb_adapter *adapter, ring_count = txr_count + rxr_count; size = struct_size(q_vector, ring, ring_count); + size = kmalloc_size_roundup(size); /* allocate q_vector and rings */ q_vector = adapter->q_vector[v_idx]; -- 2.34.1
