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Date:   Sun, 03 Feb 2019 11:40:05 -0800 (PST)
From:   David Miller <>
Subject: Re: [PATCH net-next] net: Fix ip_mc_{dec,inc}_group allocation

From: Florian Fainelli <>
Date: Fri,  1 Feb 2019 20:20:52 -0800

> After 4effd28c1245 ("bridge: join all-snoopers multicast address"), I
> started seeing the following sleep in atomic warnings:
> while toggling the bridge's multicast_snooping attribute dynamically.
> Pass a gfp_t down to igmpv3_add_delrec(), introduce
> __igmp_group_dropped() and introduce __ip_mc_dec_group() to take a gfp_t
> argument.
> Similarly introduce ____ip_mc_inc_group() and __ip_mc_inc_group() to
> allow caller to specify gfp_t.
> IPv6 part of the patch appears fine.
> Fixes: 4effd28c1245 ("bridge: join all-snoopers multicast address")
> Signed-off-by: Florian Fainelli <>


Maybe you could submit a quick test case since you had a reproducer?

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