espintcp: fix skb leaks
In the Linux kernel, the following vulnerability has been resolved:
A few error paths are missing a kfree_skb.
Exploitability
AV:N
AC:L
PR:N
UI:N
Scope
S:U
Impact
C:N
I:N
A:H
7.5/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H