BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 1f5c2c067 P4D 1f5c2c067 PUD 1f5c2d067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 17479 Comm: syz-executor.2 Not tainted 5.8.0-rc5-next-20200715-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc9001d6471a0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000081 RCX: ffffc9000d80a000 RDX: 0000000000000000 RSI: 0000000000000081 RDI: ffff8880588d0000 RBP: ffff8880588d0000 R08: 0000000000000000 R09: ffff8880588d0047 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff88c3c880 R13: 0000000000000000 R14: 0000000000000081 R15: 0000000000000081 FS: 00007fdf4b43a700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001f4613000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vlan_add_rx_filter_info+0x149/0x1d0 net/8021q/vlan_core.c:210 vlan_filter_push_vids+0x10f/0x280 net/8021q/vlan_core.c:261 vlan_device_event+0x2cb/0x2010 net/8021q/vlan.c:518 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2033 call_netdevice_notifiers_extack net/core/dev.c:2045 [inline] call_netdevice_notifiers net/core/dev.c:2059 [inline] vlan_get_rx_ctag_filter_info include/linux/if_vlan.h:86 [inline] __netdev_update_features+0xc29/0x1360 net/core/dev.c:9220 ethnl_set_features+0x449/0xa70 net/ethtool/features.c:274 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline] genl_family_rcv_msg net/netlink/genetlink.c:714 [inline] genl_rcv_msg+0x61d/0x980 net/netlink/genetlink.c:731 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2469 genl_rcv+0x24/0x40 net/netlink/genetlink.c:742 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2362 ___sys_sendmsg+0xf3/0x170 net/socket.c:2416 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2449 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cba9 Code: Bad RIP value. RSP: 002b:00007fdf4b439c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000500340 RCX: 000000000045cba9 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000006 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000988 R14: 00000000004d6c78 R15: 00007fdf4b43a6d4 Modules linked in: CR2: 0000000000000000 ---[ end trace 56a5058c42f720eb ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc9001d6471a0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000081 RCX: ffffc9000d80a000 RDX: 0000000000000000 RSI: 0000000000000081 RDI: ffff8880588d0000 RBP: ffff8880588d0000 R08: 0000000000000000 R09: ffff8880588d0047 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff88c3c880 R13: 0000000000000000 R14: 0000000000000081 R15: 0000000000000081 FS: 00007fdf4b43a700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000001f4613000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400