Re: KASAN: invalid-free in tcf_exts_destroy

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger crash:

Reported-and-tested-by: syzbot+dcc34d54d68ef7d2d53d@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit:         2c19e526 net_sched: hold rtnl lock for tcindex_partial_des..
git tree:       https://github.com/congwang/linux.git tcindex
kernel config:  https://syzkaller.appspot.com/x/.config?x=bcbe864577669742
dashboard link: https://syzkaller.appspot.com/bug?extid=dcc34d54d68ef7d2d53d
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
userspace arch: i386

Note: testing is done by a robot and is best-effort only.