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Date:   Sat, 18 May 2019 14:09:15 -0400
From:   Willem de Bruijn <>
To:     syzbot <>
Cc:     David Miller <>,,
        linux-kernel <>,
        Network Development <>,,,
        Ying Xue <>,
        Dmitry Vyukov <>,
        Eric Dumazet <>,
Subject: Re: INFO: trying to register non-static key in rhashtable_walk_enter

On Sat, May 18, 2019 at 3:34 AM syzbot
<> wrote:
> Hello,
> syzbot found the following crash on:
> HEAD commit:    510e2ced ipv6: fix src addr routing with the exception table
> git tree:       net
> console output:
> kernel config:
> dashboard link:
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> Unfortunately, I don't have any reproducer for this crash yet.
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by:
> INFO: trying to register non-static key.
> the code is fine but needs lockdep annotation.

All these five rhashtable_walk_enter probably have the same root cause.

Bisected to commit 7e27e8d6130c (" tipc: switch order of device
registration to fix a crash"). Reverting that fixes it.

Before the commit, tipc_init succeeds. After the commit it fails at
register_pernet_subsys(&tipc_net_ops) due to error in


On a related note, in tipc_topsrv_start srv is also not freed on later
error paths.

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