An issue was discovered in the Linux kernel before 4.14.16. There is a use-after-free in net/sctp/socket.c for a held lock after a peel off, aka CID-a0ff660058b8.
https://syzkaller.appspot.com/bug?id=a8d38d1b68ffc744c53bd9b9fc1dbd6c86b1afe2
https://sites.google.com/view/syzscope/warning-held-lock-freed
https://security.netapp.com/advisory/ntap-20210720-0002/
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.16