general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 10234 Comm: syz-executor.2 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dequeue_head net/sched/sch_fq_codel.c:120 [inline]
RIP: 0010:fq_codel_drop net/sched/sch_fq_codel.c:168 [inline]
RIP: 0010:fq_codel_enqueue+0x877/0x10d0 net/sched/sch_fq_codel.c:230
Code: 3f bb 13 fa 45 39 e5 0f 86 cb 00 00 00 e8 21 c0 13 fa 48 8b 44 24 10 80 38 00 0f 85 71 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 45 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48
RSP: 0018:ffffc9000276f680 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d541000
RDX: 0000000000000000 RSI: ffffffff87627a6f RDI: 0000000000000004
RBP: ffffc9000276f820 R08: 0000000000000001 R09: ffffffff8fe6f877
R10: 0000000000000400 R11: 0000000000000001 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888060a30000
FS:  00007f3e30e5d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ea2d000 CR3: 000000002436d000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dev_xmit_skb net/core/dev.c:3789 [inline]
 __dev_queue_xmit+0x19ec/0x2ef0 net/core/dev.c:4101
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:295 [inline]
 __netlink_deliver_tap net/netlink/af_netlink.c:313 [inline]
 netlink_deliver_tap+0x9cb/0xc00 net/netlink/af_netlink.c:326
 netlink_deliver_tap_kernel net/netlink/af_netlink.c:335 [inline]
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x5e5/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x907/0xe10 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd3/0x130 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: 0d 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3e30e5cc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000008
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffc3b9e4f4f R14: 00007f3e30e5d9c0 R15: 000000000119bf8c
Modules linked in:
---[ end trace a31b6b61f198c658 ]---
RIP: 0010:dequeue_head net/sched/sch_fq_codel.c:120 [inline]
RIP: 0010:fq_codel_drop net/sched/sch_fq_codel.c:168 [inline]
RIP: 0010:fq_codel_enqueue+0x877/0x10d0 net/sched/sch_fq_codel.c:230
Code: 3f bb 13 fa 45 39 e5 0f 86 cb 00 00 00 e8 21 c0 13 fa 48 8b 44 24 10 80 38 00 0f 85 71 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 45 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48
RSP: 0018:ffffc9000276f680 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d541000
RDX: 0000000000000000 RSI: ffffffff87627a6f RDI: 0000000000000004
RBP: ffffc9000276f820 R08: 0000000000000001 R09: ffffffff8fe6f877
R10: 0000000000000400 R11: 0000000000000001 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888060a30000
FS:  00007f3e30e5d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ea2d000 CR3: 000000002436d000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400