linux-kernel - [syzbot] WARNING in rtnl

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Date:   Fri, 18 Nov 2022 03:17:47 -0800
From:   syzbot <syzbot+d8c77f7232bfdb254e37@...kaller.appspotmail.com>
To:     ast@...nel.org, bpf@...r.kernel.org, daniel@...earbox.net,
        davem@...emloft.net, edumazet@...gle.com, hawk@...nel.org,
        idosch@...dia.com, john.fastabend@...il.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        pabeni@...hat.com, petrm@...dia.com,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] WARNING in rtnl_dellink (2)

Hello,

syzbot found the following issue on:

HEAD commit:    a70385240892 Merge tag 'perf_urgent_for_v6.1_rc2' of git:/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=147717d2880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ea03ca45176080bc
dashboard link: https://syzkaller.appspot.com/bug?extid=d8c77f7232bfdb254e37
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5e17f1e83cf3/disk-a7038524.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f8ef729877f7/vmlinux-a7038524.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d8c77f7232bfdb254e37@...kaller.appspotmail.com

bond0 (unregistering): (slave bond3): Releasing backup interface
bond0 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 1 PID: 20974 at net/core/dev.c:10871 unregister_netdevice_many+0x13ba/0x1930 net/core/dev.c:10871
Modules linked in:
CPU: 0 PID: 20974 Comm: syz-executor.1 Not tainted 6.1.0-rc1-syzkaller-00454-ga70385240892 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0010:unregister_netdevice_many+0x13ba/0x1930 net/core/dev.c:10871
Code: 0b e9 27 f1 ff ff e8 75 08 24 fa be 04 00 00 00 4c 89 f7 e8 28 96 ab fc e9 42 fb ff ff 48 89 dd e9 1c f9 ff ff e8 56 08 24 fa <0f> 0b e9 f0 f9 ff ff e8 4a 08 24 fa 0f b6 1d dc e5 73 06 31 ff 89
RSP: 0018:ffffc9000b4ff268 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88807627c0b0 RCX: ffffc90004743000
RDX: 0000000000040000 RSI: ffffffff8758834a RDI: 0000000000000005
RBP: ffff88801ecf8080 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000008c07e R12: 0000000000000000
R13: ffff88801ecf8080 R14: ffff88807627c000 R15: dffffc0000000000
FS:  00007f42ed863700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f220e57f1b8 CR3: 0000000036be9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000b002800
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rtnl_delete_link net/core/rtnetlink.c:3123 [inline]
 rtnl_dellink+0x354/0xa90 net/core/rtnetlink.c:3174
 rtnetlink_rcv_msg+0x43a/0xca0 net/core/rtnetlink.c:6091
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2540
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:734
 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536
 __sys_sendmsg+0xf3/0x1c0 net/socket.c:2565
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f42ec68b5f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f42ed863168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f42ec7abf80 RCX: 00007f42ec68b5f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 00007f42ec6e67b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f42eccdfb1f R14: 00007f42ed863300 R15: 0000000000022000
 </TASK>


---
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