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From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Reshetova, Elena" <elena.reshetova@intel.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"bridge@lists.linux-foundation.org" 
	<bridge@lists.linux-foundation.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"kuznet@ms2.inr.ac.ru" <kuznet@ms2.inr.ac.ru>,
	"jmorris@namei.org" <jmorris@namei.org>,
	"kaber@trash.net" <kaber@trash.net>,
	"stephen@networkplumber.org" <stephen@networkplumber.org>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"keescook@chromium.org" <keescook@chromium.org>
Subject: Re: [PATCH 00/17] v3 net generic subsystem refcount conversions
Date: Mon, 03 Jul 2017 03:30:17 -0700	[thread overview]
Message-ID: <1499077817.1462.8.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <2236FBA76BA1254E88B949DDB74E612B6FF2029D@IRSMSX102.ger.corp.intel.com>

On Mon, 2017-07-03 at 09:57 +0000, Reshetova, Elena wrote:

> Thank you very much for the report! This is an underflow (dec/sub from
> zero) that is reported by WARNING. 
> I guess it is unlikely that actual code underflows, so the most
> probable cause is that it attempted to do refcount_inc/add() from
> zero, but then failed. 
> However  in that case you should have seen another warning on
> refcount_inc() somewhere earlier. That one is actually the one I need
> to see to track the root cause. 
> Could you tell me how do you arrive to the below output? Boot in what
> config/etc. 
> I can try to reproduce to debug further. 

I sent this fix : 

https://patchwork.ozlabs.org/patch/783389/

Thanks.

  reply	other threads:[~2017-07-03 10:30 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-30 10:07 Elena Reshetova
2017-06-30 10:07 ` [PATCH 01/17] net: convert inet_peer.refcnt from atomic_t to refcount_t Elena Reshetova
2017-06-30 10:07 ` [PATCH 02/17] net: convert neighbour.refcnt " Elena Reshetova
2017-06-30 10:07 ` [PATCH 03/17] net: convert neigh_params.refcnt " Elena Reshetova
2017-06-30 10:07 ` [PATCH 04/17] net: convert nf_bridge_info.use " Elena Reshetova
2017-06-30 10:07 ` [PATCH 05/17] net: convert sk_buff.users " Elena Reshetova
2017-06-30 10:07 ` [PATCH 06/17] net: convert sk_buff_fclones.fclone_ref " Elena Reshetova
2017-06-30 10:08 ` [PATCH 07/17] net: convert sock.sk_wmem_alloc " Elena Reshetova
2017-06-30 10:08 ` [PATCH 08/17] net: convert sock.sk_refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 09/17] net: convert ip_mc_list.refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 10/17] net: convert in_device.refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 11/17] net: convert netpoll_info.refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 12/17] net: convert unix_address.refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 13/17] net: convert fib_rule.refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 14/17] net: convert inet_frag_queue.refcnt " Elena Reshetova
2017-06-30 10:08 ` [PATCH 15/17] net: convert net.passive " Elena Reshetova
2017-06-30 10:08 ` [PATCH 16/17] net: convert netlbl_lsm_cache.refcount " Elena Reshetova
2017-06-30 10:08 ` [PATCH 17/17] net: convert packet_fanout.sk_ref " Elena Reshetova
2017-07-03  9:28 ` [PATCH 00/17] v3 net generic subsystem refcount conversions Eric Dumazet
2017-07-03  9:57   ` Reshetova, Elena
2017-07-03 10:30     ` Eric Dumazet [this message]
2017-07-08 18:51   ` Levin, Alexander (Sasha Levin)
2017-07-10  7:13     ` Reshetova, Elena

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