bond0 (unregistering): Releasing backup interface bond_slave_0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7655 Comm: kworker/u4:5 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
task: ffff8880912de300 task.stack: ffff8880a93d0000
RIP: 0010:hsr_netdev_notify+0x2e1/0x8b0 net/hsr/hsr_main.c:65
RSP: 0018:ffff8880a93d76e0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88808a2c43c0 RCX: 0000000000000001
RDX: 0000000000000002 RSI: 00000000ffffffff RDI: ffff88808f29faa0
RBP: 0000000000000000 R08: ffff8880912de690 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88805a9b7650
R13: ffff88805a9b7640 R14: 0000000000000002 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe9e6d9c20 CR3: 00000000869b8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93
 call_netdevice_notifiers_info net/core/dev.c:1667 [inline]
 call_netdevice_notifiers+0x79/0xa0 net/core/dev.c:1683
 __bond_release_one+0x10bd/0x1550 drivers/net/bonding/bond_main.c:1937
 bond_slave_netdev_event drivers/net/bonding/bond_main.c:3108 [inline]
 bond_netdev_event+0x8ff/0xad0 drivers/net/bonding/bond_main.c:3206
 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93
 call_netdevice_notifiers_info net/core/dev.c:1667 [inline]
 call_netdevice_notifiers net/core/dev.c:1683 [inline]
 rollback_registered_many+0x70b/0xb30 net/core/dev.c:7203
 unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8285
 unregister_netdevice_many net/core/dev.c:8284 [inline]
 default_device_exit_batch+0x2d8/0x380 net/core/dev.c:8746
 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:145
 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 03 0f 8e d9 04 00 00 83 7d 20 04 75 b5 e8 c8 73 0e fb 48 8d 45 10 48 89 c2 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 68 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 
RIP: hsr_netdev_notify+0x2e1/0x8b0 net/hsr/hsr_main.c:65 RSP: ffff8880a93d76e0
---[ end trace 150b0ee185af1ffa ]---