Re: [PATCH] Fix suspicious RCU usage warning

[Stephen Rothwell]

Hi all,

On Wed, 13 May 2020 11:46:10 +0530 madhuparnabhowmik10@xxxxxxxxx wrote:
>
> From: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>
> 
> 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 <kuba@xxxxxxxxxx>
> Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>

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

-- 
Cheers,
Stephen Rothwell

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