CVE-2021-46998

In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.

• linux linux kernel (>= 4.16 < 4.19.191) • linux linux kernel (>= 4.20 < 5.4.120) • linux linux kernel (>= 5.5 < 5.10.38) • linux linux kernel (>= 5.11 < 5.11.22) • linux linux kernel (>= 5.12 < 5.12.5)