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: 26633 Comm: syz-executor.1 Not tainted 5.14.0-rc5-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+0x83b/0x10c0 net/sched/sch_fq_codel.c:230
Code: 0b b9 2c fa 45 39 ec 0f 83 cb 00 00 00 e8 cd b0 2c fa 48 8b 44 24 10 80 38 00 0f 85 9a 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 6e 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48
RSP: 0018:ffffc900017df858 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000b9e2000
RDX: 0000000000000000 RSI: ffffffff8748f6f3 RDI: 0000000000000003
RBP: ffffc900017dfa30 R08: 0000000000000400 R09: 0000000000000001
R10: ffffffff8748f653 R11: 0000000000000000 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880168a0000
FS:  00007f77abf06700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000006f6c CR3: 0000000038dbc000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dev_qdisc_enqueue+0x40/0x300 net/core/dev.c:3854
 __dev_xmit_skb net/core/dev.c:3938 [inline]
 __dev_queue_xmit+0x1e28/0x3620 net/core/dev.c:4253
 packet_snd net/packet/af_packet.c:3016 [inline]
 packet_sendmsg+0x22fc/0x52b0 net/packet/af_packet.c:3044
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 __sys_sendto+0x21c/0x320 net/socket.c:2019
 __do_sys_sendto net/socket.c:2031 [inline]
 __se_sys_sendto net/socket.c:2027 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2027
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
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:00007f77abf06188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00000000004bfcc4 R08: 00000000200002c0 R09: 0000000000000014
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe99d8ab0f R14: 00007f77abf06300 R15: 0000000000022000
Modules linked in:
---[ end trace f7105f6c10312b73 ]---
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+0x83b/0x10c0 net/sched/sch_fq_codel.c:230
Code: 0b b9 2c fa 45 39 ec 0f 83 cb 00 00 00 e8 cd b0 2c fa 48 8b 44 24 10 80 38 00 0f 85 9a 06 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 32 00 0f 85 6e 06 00 00 48 8b 10 48 8d 78 28 49 89 17 48
RSP: 0018:ffffc900017df858 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000b9e2000
RDX: 0000000000000000 RSI: ffffffff8748f6f3 RDI: 0000000000000003
RBP: ffffc900017dfa30 R08: 0000000000000400 R09: 0000000000000001
R10: ffffffff8748f653 R11: 0000000000000000 R12: 0000000000000400
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880168a0000
FS:  00007f77abf06700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000006f6c CR3: 0000000038dbc000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0b b9 2c fa 45 39    	or     0x3945fa2c(%rcx),%edi
   6:	ec                   	in     (%dx),%al
   7:	0f 83 cb 00 00 00    	jae    0xd8
   d:	e8 cd b0 2c fa       	callq  0xfa2cb0df
  12:	48 8b 44 24 10       	mov    0x10(%rsp),%rax
  17:	80 38 00             	cmpb   $0x0,(%rax)
  1a:	0f 85 9a 06 00 00    	jne    0x6ba
  20:	49 8b 07             	mov    (%r15),%rax
  23:	48 89 c2             	mov    %rax,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:	42 80 3c 32 00       	cmpb   $0x0,(%rdx,%r14,1) <-- trapping instruction
  2f:	0f 85 6e 06 00 00    	jne    0x6a3
  35:	48 8b 10             	mov    (%rax),%rdx
  38:	48 8d 78 28          	lea    0x28(%rax),%rdi
  3c:	49 89 17             	mov    %rdx,(%r15)
  3f:	48                   	rex.W