Description: possibility of deadlock in libbpf function sock_hash_delete_elem
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2159764
 https://lore.kernel.org/lkml/CABcoxUayum5oOqFMMqAeWuS8+EzojquSOSyDA3J_2omY=2EeAg@mail.gmail.com/
 https://lore.kernel.org/all/63dddcc92fc31_6bb15208e9@john.notmuch/
 https://lore.kernel.org/netdev/87a614h62a.fsf@cloudflare.com/t/#u
Notes:
 carnil> As noted by Ubuntu: first attempt to fix was reverted in
 carnil> 8c5c2a4898e3 ("bpf, sockmap: Revert buggy deadlock fix in the
 carnil> sockhash and sockmap")
Bugs:
upstream:
6.1-upstream-stable:
5.10-upstream-stable:
4.19-upstream-stable:
sid:
6.1-bookworm-security:
5.10-bullseye-security:
4.19-buster-security: