On Fri, Mar 13, 2020 at 2:45 AM Florian Westphal [off-list ref] wrote:

syzbot [off-list ref] wrote:

quoted

syzbot has bisected this bug to:

commit 4e645b47c4f000a503b9c90163ad905786b9bc1d
Author: Florian Westphal [off-list ref]
Date:   Thu Nov 30 23:21:02 2017 +0000

    netfilter: core: make nf_unregister_net_hooks simple wrapper again

No idea why this turns up, the reproducer doesn't hit any of these code
paths.

The attached bisection log usually makes this reasonably transparent.
It seems that in this case another kernel bug gets in the way of bisection.

The debug splat is a false-positive; ndo_stop/list_del hasn't run yet.
I will send a fix for net tree.

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