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Date:   Wed, 13 May 2020 21:52:50 +1000
From:   Stephen Rothwell <>
Subject: Re: [PATCH] Fix suspicious RCU usage warning

Hi all,

On Wed, 13 May 2020 11:46:10 +0530 wrote:
> From: Madhuparna Bhowmik <>
> This patch fixes the following warning:
> =============================
> WARNING: suspicious RCU usage
> 5.7.0-rc4-next-20200507-syzkaller #0 Not tainted
> -----------------------------
> net/ipv6/ip6mr.c:124 RCU-list traversed in non-reader section!!
> ipmr_new_table() returns an existing table, but there is no table at
> init. Therefore the condition: either holding rtnl or the list is empty
> is used.
> Suggested-by: Jakub Kicinski <>
> Signed-off-by: Madhuparna Bhowmik <>

Thanks.  Added to my fixes tree from tomorrow (until it turns up

Stephen Rothwell

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