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: 7092 Comm: syz-executor859 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+0x8a3/0x10c0 net/sched/sch_fq_codel.c:230
Code: f3 15 0b fb 45 39 ec 0f 83 cb 00 00 00 e8 e5 19 0b 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:ffffc90006087668 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8669248b
RDX: 0000000000000000 RSI: ffffffff8669252b RDI: 0000000000000004
RBP: ffffc90006087808 R08: 0000000000000001 R09: ffffffff8c5f3aaf
R10: 0000000000000400 R11: 0000000000086bc8 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888084ca0000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000096bb840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000000a65d0000 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+0x1878/0x2d60 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+0x92e/0xb70 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+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:671
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440
 do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline]
 __do_fast_syscall_32+0x57/0x80 arch/x86/entry/common.c:126
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f14549
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffb2bbfc EFLAGS: 00000246 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200001c0
RDX: 0000000000000000 RSI: 00000000f7f1428c RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace e39108877a1e547d ]---
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: f3 15 0b fb 45 39 ec 0f 83 cb 00 00 00 e8 e5 19 0b 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:ffffc90006087668 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8669248b
RDX: 0000000000000000 RSI: ffffffff8669252b RDI: 0000000000000004
RBP: ffffc90006087808 R08: 0000000000000001 R09: ffffffff8c5f3aaf
R10: 0000000000000400 R11: 0000000000086bc8 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888084ca0000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:00000000096bb840
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 00000000a65d0000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400