netdev - Re: [vdpa_sim_net] 79991caf52: net/ipv4/ipmr.c:#RCU-list_traversed_in_non-reader

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Date:   Mon, 8 Feb 2021 04:57:20 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     kernel test robot <oliver.sang@...el.com>
Cc:     Dongli Zhang <dongli.zhang@...cle.com>,
        Eli Cohen <elic@...dia.com>, Jason Wang <jasowang@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        lkp@...el.com, virtualization@...ts.linux-foundation.org,
        kvm@...r.kernel.org, netdev@...r.kernel.org, pbonzini@...hat.com,
        stefanha@...hat.com, joe.jin@...cle.com,
        aruna.ramakrishna@...cle.com, parav@...dia.com
Subject: Re: [vdpa_sim_net] 79991caf52:
 net/ipv4/ipmr.c:#RCU-list_traversed_in_non-reader_section

On Sun, Feb 07, 2021 at 11:03:30AM +0800, kernel test robot wrote:
> 
> Greeting,
> 
> FYI, we noticed the following commit (built with gcc-9):
> 
> commit: 79991caf5202c7989928be534727805f8f68bb8d ("vdpa_sim_net: Add support for user supported devices")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git Dongli-Zhang/vhost-scsi-alloc-vhost_scsi-with-kvzalloc-to-avoid-delay/20210129-191605
> 
> 
> in testcase: trinity
> version: trinity-static-x86_64-x86_64-f93256fb_2019-08-28
> with following parameters:
> 
> 	runtime: 300s
> 
> test-description: Trinity is a linux system call fuzz tester.
> test-url: http://codemonkey.org.uk/projects/trinity/
> 
> 
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 

Parav want to take a look?

-- 
MST