Please apply mainline commit a72b69dc083a931422cc8a5e33841aff7d5312f2
("vhost/vsock: fix uninitialized vhost_vsock->guest_cid") to the v4.9
and v4.14 stable branches.
I believe this is the root cause of an issue uncovered by applying
"vhost/vsock: fix use-after-free in network stack callers" in these
branches. I sometimes see a crash in hash_del_rcu() with vsock in the
call stack, and that call is protected by a newly-added check of
vsock->guest_cid, which was uninitialized before this commit.
v4.4 doesn't have vsock, and v4.19 already has this commit, so they
don't need to be fixed.
Thanks,
-- Daniel
