Description: net: sched: fix use-after-free in tc_new_tfilter()
References:
 https://syzkaller.appspot.com/bug?id=2212474c958978ab86525fe6832ac8102c309ffc
Notes:
 carnil> Commit fixes 470502de5bdb ("net: sched: unlock rules update
 carnil> API") in 5.1-rc1.
Bugs:
upstream: released (5.17-rc3) [04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5]
5.10-upstream-stable: released (5.10.97) [e7be56926397cf9d992be8913f74a76152f8f08d]
4.19-upstream-stable: N/A "Vulnerable code not present"
4.9-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.16.7-1)
5.10-bullseye-security: released (5.10.103-1)
4.19-buster-security: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"