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Date:   Fri, 22 May 2020 15:39:58 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net] tipc: block BH before using dst_cache

From: Eric Dumazet <>
Date: Thu, 21 May 2020 11:29:58 -0700

> dst_cache_get() documents it must be used with BH disabled.
> sysbot reported :
> BUG: using smp_processor_id() in preemptible [00000000] code: /21697
> caller is dst_cache_get+0x3a/0xb0 net/core/dst_cache.c:68
> Fixes: e9c1a793210f ("tipc: add dst_cache support for udp media")
> Signed-off-by: Eric Dumazet <>
> Reported-by: syzbot <>

Applied and queued up for -stable, thanks.

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