general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 17033 Comm: syz-executor.0 Not tainted 5.8.0-rc4-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+0x8a3/0x10c0 net/sched/sch_fq_codel.c:230
Code: d3 fe 14 fb 45 39 ec 0f 83 cb 00 00 00 e8 c5 02 15 fb 48 8b 44 24 10 80 38 00 0f 85 32 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 06 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48
RSP: 0018:ffffc9000d14f678 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90001bc9000
RDX: 0000000000000000 RSI: ffffffff865eb73b RDI: 0000000000000004
RBP: ffffc9000d14f818 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000400 R11: 0000000000000000 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88804c820000
FS:  00007f1cd4017700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000000a8f7d000 CR4: 00000000001406e0
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+0x1878/0x2d60 net/core/dev.c:4100
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:294 [inline]
 __netlink_deliver_tap net/netlink/af_netlink.c:312 [inline]
 netlink_deliver_tap+0x92e/0xb70 net/netlink/af_netlink.c:325
 netlink_deliver_tap_kernel net/netlink/af_netlink.c:334 [inline]
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x5e5/0x7d0 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2352
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2406
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439
 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:00007f1cd4016c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000500b40 RCX: 000000000045cba9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009b9 R14: 00000000004cc890 R15: 00007f1cd40176d4
Modules linked in:
---[ end trace 5b0501c77a895214 ]---
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+0x8a3/0x10c0 net/sched/sch_fq_codel.c:230
Code: d3 fe 14 fb 45 39 ec 0f 83 cb 00 00 00 e8 c5 02 15 fb 48 8b 44 24 10 80 38 00 0f 85 32 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 06 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48
RSP: 0018:ffffc9000d14f678 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90001bc9000
RDX: 0000000000000000 RSI: ffffffff865eb73b RDI: 0000000000000004
RBP: ffffc9000d14f818 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000400 R11: 0000000000000000 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88804c820000
FS:  00007f1cd4017700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000000a8f7d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400