In the Linux kernel, the following vulnerability has been resolved:netmem: prevent TX of unreadable skbsCurrently on stable trees we have support for netmem/devmem RX but not
TX. It is not safe to forward/redirect an RX unreadable netmem packet
into the device's TX path, as the device may call dma-mapping APIs on
dma addrs that should not be passed to it.Fix this by preventing the xmit of unreadable skbs.Tested by configuring tc redirect:sudo tc qdisc add dev eth1 ingress
sudo tc filter add dev eth1 ingress protocol ip prio 1 flower ip_proto \
	tcp src_ip 192.168.1.12 action mirred egress redirect dev eth1Before, I see unreadable skbs in the driver's TX path passed to dma
mapping APIs.After, I don't see unreadable skbs in the driver's TX path passed to dma
mapping APIs.