linux-kernel - Re: [syzbot] [net?] INFO: rcu detected stall in packet

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Message-ID: <20240530003325.h35jkwdm7mifcnc2@skbuf>
Date: Thu, 30 May 2024 03:33:25 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: Hillf Danton <hdanton@...a.com>
Cc: syzbot <syzbot+a7d2b1d5d1af83035567@...kaller.appspotmail.com>,
	edumazet@...gle.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, radoslaw.zielonek@...il.com,
	syzkaller-bugs@...glegroups.com, vinicius.gomes@...el.com
Subject: Re: [syzbot] [net?] INFO: rcu detected stall in packet_release

On Thu, May 30, 2024 at 07:47:45AM +0800, Hillf Danton wrote:
> On Wed, 29 May 2024 16:10:02 -0700
> > syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> > INFO: rcu detected stall in sctp_addr_wq_timeout_handler
> 
> Feel free to read again the root cause [1] Vlad.
> 
> [1] https://lore.kernel.org/lkml/20240528122610.21393-2-radoslaw.zielonek@gmail.com/
> 
> Adding the tested patch in the net tree now looks like a case of blind landing.

What is the fact that you submitted only my patch 1/2 for syzbot testing
supposed to prove? It is the second patch (2/2) that addresses what has
been reported here; I thought the tags made that clear:
https://lore.kernel.org/netdev/20240527153955.553333-2-vladimir.oltean@nxp.com/
Patch 2/2 has patch 1/2 as a dependency, which is why they were
submitted that way.