kernel: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send

A use-after-free flaw was found in the Linux kernel’s Qualcomm Gigabit Ethernet Media Access Controller EMAC driver in how a user triggers an error path in the emactxfilltpd function. This flaw allows a local user to crash or potentially escalate their privileges on the system...

CVE-2021-47013

In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emacmactxbufsend In emacmactxbufsend, it calls emactxfilltpd..,skb,... If some error happens in emactxfilltpd, the skb will be freed via devkfreeskbskb in error branch of emactxfilltpd...