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Date:   Mon, 07 Nov 2022 11:02:52 -0800
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Subject: [syzbot] linux-next test error: WARNING in devl_port_unregister
From:   syzbot <syzbot+c2ca18f0fccdd1f09c66@syzkaller.appspotmail.com>
To:     davem@davemloft.net, edumazet@google.com, jiri@nvidia.com,
        kuba@kernel.org, linux-kernel@vger.kernel.org,
        linux-next@vger.kernel.org, netdev@vger.kernel.org,
        pabeni@redhat.com, sfr@canb.auug.org.au,
        syzkaller-bugs@googlegroups.com
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Hello,

syzbot found the following issue on:

HEAD commit:    d8e87774068a Add linux-next specific files for 20221107
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17b99fde880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=97401fe9f72601bf
dashboard link: https://syzkaller.appspot.com/bug?extid=c2ca18f0fccdd1f09c66
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/671a9d3d5dc6/disk-d8e87774.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ef1309efbb19/vmlinux-d8e87774.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7592dabd2a3a/bzImage-d8e87774.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c2ca18f0fccdd1f09c66@syzkaller.appspotmail.com

wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
------------[ cut here ]------------
WARNING: CPU: 0 PID: 11 at net/core/devlink.c:9998 devl_port_unregister+0x2f6/0x390 net/core/devlink.c:9998
Modules linked in:
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.0-rc3-next-20221107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
RIP: 0010:devl_port_unregister+0x2f6/0x390 net/core/devlink.c:9998
Code: e8 8f 45 fc f9 85 ed 0f 85 7a fd ff ff e8 b2 48 fc f9 0f 0b e9 6e fd ff ff e8 a6 48 fc f9 0f 0b e9 53 ff ff ff e8 9a 48 fc f9 <0f> 0b e9 94 fd ff ff e8 de f9 48 fa e9 78 ff ff ff e8 a4 f9 48 fa
RSP: 0018:ffffc90000107a08 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888020492810 RCX: 0000000000000000
RDX: ffff888011a33a80 RSI: ffffffff87809286 RDI: 0000000000000005
RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: ffff888020492810
R13: ffff888020492808 R14: ffff888020491800 R15: ffff888020492800
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00213d000 CR3: 000000007318b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __nsim_dev_port_del+0x1bb/0x240 drivers/net/netdevsim/dev.c:1433
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1443 [inline]
 nsim_dev_reload_destroy+0x171/0x510 drivers/net/netdevsim/dev.c:1660
 nsim_dev_reload_down+0x6b/0xd0 drivers/net/netdevsim/dev.c:968
 devlink_reload+0x1c2/0x6b0 net/core/devlink.c:4501
 devlink_pernet_pre_exit+0x104/0x1c0 net/core/devlink.c:12609
 ops_pre_exit_list net/core/net_namespace.c:159 [inline]
 cleanup_net+0x451/0xb10 net/core/net_namespace.c:594
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>


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