From: Nick Child <nnac123@xxxxxxxxxxxxx> [ Upstream commit 1cc6571f562774f1d928dc8b3cff50829b86e970 ] When requesting a TX queue at a given index, warn on out-of-bounds referencing if the index is greater than the allocated number of queues. Specifically, since this function is used heavily in the networking stack use DEBUG_NET_WARN_ON_ONCE to avoid executing a new branch on every packet. Signed-off-by: Nick Child <nnac123@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230321150725.127229-2-nnac123@xxxxxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- include/linux/netdevice.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index b072449b0f1ac..eac51e22a52a8 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2428,6 +2428,7 @@ static inline struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, unsigned int index) { + DEBUG_NET_WARN_ON_ONCE(index >= dev->num_tx_queues); return &dev->_tx[index]; } -- 2.39.2
