WARNING in devlink_port_type_warn

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    c68c5373 Add linux-next specific files for 20191107
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10b177fae00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=742545dcdea21726
dashboard link: https://syzkaller.appspot.com/bug?extid=b0a18ed7b08b735d2f41
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)

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

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+b0a18ed7b08b735d2f41@xxxxxxxxxxxxxxxxxxxxxxxxx

hid-generic 0000:0000:0000.0009: unknown main item tag 0x0
hid-generic 0000:0000:0000.0009: unknown main item tag 0x0
hid-generic 0000:0000:0000.0009: hidraw0: <UNKNOWN> HID v0.00 Device [syz1]  
on syz1
------------[ cut here ]------------
Type was not set for devlink port.
WARNING: CPU: 1 PID: 50 at net/core/devlink.c:6342  
devlink_port_type_warn+0x15/0x20 net/core/devlink.c:6342
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 50 Comm: kworker/1:1 Not tainted 5.4.0-rc6-next-20191107 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Workqueue: events devlink_port_type_warn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:devlink_port_type_warn+0x15/0x20 net/core/devlink.c:6342
Code: 89 df e8 de 44 ec fb e9 d3 fe ff ff 66 0f 1f 84 00 00 00 00 00 55 48  
89 e5 e8 f7 19 b0 fb 48 c7 c7 e0 ef 4a 88 e8 63 2b 81 fb <0f> 0b 5d c3 0f  
1f 80 00 00 00 00 55 48 89 e5 41 55 49 89 f5 41 54
RSP: 0018:ffff8880a9b07d30 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815d0b86 RDI: ffffed1015360f98
RBP: ffff8880a9b07d30 R08: ffff8880a9b365c0 R09: fffffbfff14f374c
R10: fffffbfff14f374b R11: ffffffff8a79ba5f R12: ffff888076daecc0
R13: 0000000000000080 R14: ffff8880a99aa900 R15: ffff8880ae934540
 process_one_work+0x9af/0x1740 kernel/workqueue.c:2263
 worker_thread+0x98/0xe40 kernel/workqueue.c:2409
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..


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