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: 7042 Comm: syz-executor807 Not tainted 5.9.0-rc2-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+0xc1e/0x13d0 net/sched/sch_fq_codel.c:230
Code: 89 34 24 4c 89 fb 48 8b 44 24 28 42 80 3c 38 00 48 8b 6c 24 60 74 08 48 89 ef e8 cd 14 15 fb 4c 8b 6d 00 4d 89 ef 49 c1 ef 03 <41> 80 3c 1f 00 74 08 4c 89 ef e8 b3 14 15 fb 4d 8b 75 00 48 8b 44
RSP: 0018:ffffc90002b07898 EFLAGS: 00010246
RAX: 1ffff11010910000 RBX: dffffc0000000000 RCX: ffff888084880000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888084880000 R08: ffffffff869fbb88 R09: fffffbfff167dab2
R10: fffffbfff167dab2 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f2452de2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000000917b1000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dev_xmit_skb net/core/dev.c:3794 [inline]
 __dev_queue_xmit+0x10f7/0x2940 net/core/dev.c:4105
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:295 [inline]
 __netlink_deliver_tap net/netlink/af_netlink.c:313 [inline]
 netlink_deliver_tap+0x5be/0x810 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+0x75c/0x940 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg net/socket.c:671 [inline]
 ____sys_sendmsg+0x519/0x800 net/socket.c:2353
 ___sys_sendmsg net/socket.c:2407 [inline]
 __sys_sendmsg+0x2b1/0x360 net/socket.c:2440
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x44aab9
Code: e8 dc 0f 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 1b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2452de1ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006e0c58 RCX: 000000000044aab9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00000000006e0c50 R08: 00007f2452de2700 R09: 0000000000000000
R10: 00007f2452de2700 R11: 0000000000000246 R12: 00000000006e0c5c
R13: 00007fff1265415f R14: 00007f2452de29c0 R15: 00000000006e0c5c
Modules linked in:
---[ end trace 0625a51a0a994309 ]---
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+0xc1e/0x13d0 net/sched/sch_fq_codel.c:230
Code: 89 34 24 4c 89 fb 48 8b 44 24 28 42 80 3c 38 00 48 8b 6c 24 60 74 08 48 89 ef e8 cd 14 15 fb 4c 8b 6d 00 4d 89 ef 49 c1 ef 03 <41> 80 3c 1f 00 74 08 4c 89 ef e8 b3 14 15 fb 4d 8b 75 00 48 8b 44
RSP: 0018:ffffc90002b07898 EFLAGS: 00010246
RAX: 1ffff11010910000 RBX: dffffc0000000000 RCX: ffff888084880000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888084880000 R08: ffffffff869fbb88 R09: fffffbfff167dab2
R10: fffffbfff167dab2 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f2452de2700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000000917b1000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400