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: 12646 Comm: syz-executor.0 Not tainted 5.11.0-rc6-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: a3 21 4d fa 45 39 ec 0f 83 cb 00 00 00 e8 f5 1b 4d fa 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:ffffc900025c7688 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90002119000
RDX: 0000000000000000 RSI: ffffffff8725b8ab RDI: 0000000000000003
RBP: ffffc900025c7820 R08: 0000000000000007 R09: 0000000000000001
R10: ffffffff8725b80b R11: 0000000000000000 R12: 0000000000000007
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888011b8fc00
FS:  00007f25a1cd5700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 0000000062c17000 CR4: 0000000000350ee0
Call Trace:
 __dev_xmit_skb net/core/dev.c:3807 [inline]
 __dev_queue_xmit+0x1913/0x2dd0 net/core/dev.c:4119
 __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:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2345
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2432
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x465b09
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f25a1cd5188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000005
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd37ff2daf R14: 00007f25a1cd5300 R15: 0000000000022000
Modules linked in:
---[ end trace ed5eed561bb370f5 ]---
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: a3 21 4d fa 45 39 ec 0f 83 cb 00 00 00 e8 f5 1b 4d fa 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:ffffc900025c7688 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90002119000
RDX: 0000000000000000 RSI: ffffffff8725b8ab RDI: 0000000000000003
RBP: ffffc900025c7820 R08: 0000000000000007 R09: 0000000000000001
R10: ffffffff8725b80b R11: 0000000000000000 R12: 0000000000000007
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888011b8fc00
FS:  00007f25a1cd5700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200001c0 CR3: 0000000062c17000 CR4: 0000000000350ee0