Description: sched/rt: pick_next_rt_entity(): check list_entry
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2173436
 https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=7c4a5b89a0b5a57a64b601775b296abf77a9fe97
Notes:
 carnil> Commit fixes 326587b84078 ("sched: fix goto retry in pick_next_task_rt()")
Bugs:
upstream: released (6.3-rc1) [7c4a5b89a0b5a57a64b601775b296abf77a9fe97]
6.1-upstream-stable: released (6.1.16) [6b4fcc4e8a3016e85766c161daf0732fca16c3a3]
5.10-upstream-stable: released (5.10.173) [80a1751730b302d8ab63a084b2fa52c820ad0273]
4.19-upstream-stable: released (4.19.293) [84d90fb72a053c034b018fcc3cfaa6f606faf1c6]
sid: released (6.1.20-1)
6.1-bookworm-security: N/A "Fixed before branch point"
5.10-bullseye-security: released (5.10.178-1)
4.19-buster-security: released (4.19.304-1)