device vlan2 entered promiscuous mode
device batadv0 entered promiscuous mode
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 104013067 P4D 104013067 PUD 104014067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 8406 Comm: syz-executor.1 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:garp_request_leave+0x26/0xa0 net/802/garp.c:366
Code: 00 00 00 00 41 56 49 89 d6 41 55 49 89 fd 41 54 49 89 f4 55 44 89 c5 53 89 cb e8 b5 6c 71 fe 49 8b 85 00 05 00 00 41 8b 14 24 <4c> 8b 24 d0 4d 8d 6c 24 38 4c 89 ef e8 d9 b4 80 00 49 8b 7c 24 60
RSP: 0018:ffffc90002fcf570 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff82be3fdb RDI: ffff888112fea000
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff84485fa0
R10: 00000000005b8d80 R11: 0000000000000000 R12: ffffffff84748620
R13: ffff888112fea000 R14: ffffc90002fcf5a6 R15: dead000000000100
FS:  00007f2cc9853700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000104012000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vlan_gvrp_request_leave+0x7f/0x90 net/8021q/vlan_gvrp.c:45
 vlan_dev_stop+0xec/0x160 net/8021q/vlan_dev.c:318
 __dev_close_many+0xb2/0x140 net/core/dev.c:1605
 dev_close_many+0xb0/0x190 net/core/dev.c:1630
 rollback_registered_many+0x182/0x740 net/core/dev.c:9258
 unregister_netdevice_many.part.0+0x16/0xe0 net/core/dev.c:10426
 unregister_netdevice_many+0x1f/0x30 net/core/dev.c:10425
 __rtnl_newlink+0xac9/0xbc0 net/core/rtnetlink.c:3483
 rtnl_newlink+0x49/0x70 net/core/rtnetlink.c:3500
 rtnetlink_rcv_msg+0x17e/0x460 net/core/rtnetlink.c:5563
 netlink_rcv_skb+0x5b/0x180 net/netlink/af_netlink.c:2470
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x2b6/0x3c0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x2ba/0x570 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0x4c/0x60 net/socket.c:671
 ____sys_sendmsg+0x2c4/0x2f0 net/socket.c:2353
 ___sys_sendmsg+0x81/0xc0 net/socket.c:2407
 __sys_sendmsg+0x77/0xe0 net/socket.c:2440
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d239
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2cc9852c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002c0c0 RCX: 000000000045d239
RDX: 0000000000008800 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe02f72f6f R14: 00007f2cc98539c0 R15: 000000000118cf4c
Modules linked in:
CR2: 0000000000000000
---[ end trace 406bf1bbbadad425 ]---
RIP: 0010:garp_request_leave+0x26/0xa0 net/802/garp.c:366
Code: 00 00 00 00 41 56 49 89 d6 41 55 49 89 fd 41 54 49 89 f4 55 44 89 c5 53 89 cb e8 b5 6c 71 fe 49 8b 85 00 05 00 00 41 8b 14 24 <4c> 8b 24 d0 4d 8d 6c 24 38 4c 89 ef e8 d9 b4 80 00 49 8b 7c 24 60
RSP: 0018:ffffc90002fcf570 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff82be3fdb RDI: ffff888112fea000
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff84485fa0
R10: 00000000005b8d80 R11: 0000000000000000 R12: ffffffff84748620
R13: ffff888112fea000 R14: ffffc90002fcf5a6 R15: dead000000000100
FS:  00007f2cc9853700(0000) GS:ffff88812c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000104012000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400