linux-kernel - Re: KASAN: use-after-free Read in tc_chain_fill

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Message-ID: <0000000000004bc18c05f8f896be@google.com>
Date:   Mon, 10 Apr 2023 03:10:40 -0700
From:   syzbot <syzbot+5f229e48cccc804062c0@...kaller.appspotmail.com>
To:     davem@...emloft.net, gregkh@...uxfoundation.org, jiri@...lanox.com,
        lee.jones@...aro.org, linux-kernel@...r.kernel.org,
        stable-commits@...r.kernel.org, stable@...r.kernel.org,
        syzkaller-lts-bugs@...glegroups.com, vladbu@...lanox.com
Subject: Re: KASAN: use-after-free Read in tc_chain_fill_node

This bug is marked as fixed by commit:
net: core: netlink: add helper refcount dec and lock function
net: sched: add helper function to take reference to Qdisc
net: sched: extend Qdisc with rcu
net: sched: rename qdisc_destroy() to qdisc_put()
net: sched: use Qdisc rcu API instead of relying on rtnl lock

But I can't find it in the tested trees[1] for more than 90 days.
Is it a correct commit? Please update it by replying:

#syz fix: exact-commit-title

Until then the bug is still considered open and new crashes with
the same signature are ignored.

Kernel: Linux 4.19
Dashboard link: https://syzkaller.appspot.com/bug?extid=5f229e48cccc804062c0

---
[1] I expect the commit to be present in:

1. linux-4.19.y branch of
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git