audit: type=1400 audit(1588024406.255:8): avc:  denied  { execmem } for  pid=6333 comm="syz-executor331" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6333 Comm: syz-executor331 Not tainted 4.14.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888097c08300 task.stack: ffff8880983c8000
RIP: 0010:dequeue_head net/sched/sch_fq_codel.c:125 [inline]
RIP: 0010:fq_codel_drop net/sched/sch_fq_codel.c:173 [inline]
RIP: 0010:fq_codel_enqueue+0x951/0x1070 net/sched/sch_fq_codel.c:235
RSP: 0018:ffff8880983cf870 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888086b0afc0
RDX: 0000000000000000 RSI: ffff8880983cfa00 RDI: 0000000000000000
RBP: ffff8880983cf950 R08: 000000097886abce R09: ffff88821fff7048
R10: ffff88821fff7050 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888086b00180 R15: ffff8880983cfa00
FS:  0000000001216880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056397e4e3270 CR3: 00000000a94b4000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __dev_xmit_skb net/core/dev.c:3229 [inline]
 __dev_queue_xmit+0x12dc/0x25c0 net/core/dev.c:3493
 packet_snd net/packet/af_packet.c:3012 [inline]
 packet_sendmsg+0x1bf7/0x54b0 net/packet/af_packet.c:3037
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 SYSC_sendto+0x1c4/0x2b0 net/socket.c:1763
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4404e9
RSP: 002b:00007ffc6bcea868 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000004a167e RCX: 00000000004404e9
RDX: 00000000000001e8 RSI: 0000000020000480 RDI: 0000000000000005
RBP: 54c6c2ff093a6d32 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000010000
R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000
Code: 8b 54 24 68 3b 54 24 60 0f 83 bd 00 00 00 e8 57 3b 42 fc 48 8b 44 24 38 80 38 00 0f 85 25 05 00 00 49 8b 06 48 89 c2 48 c1 ea 03 <42> 80 3c 22 00 0f 85 1d 05 00 00 48 8b 10 48 8d 78 28 49 89 16 
RIP: dequeue_head net/sched/sch_fq_codel.c:125 [inline] RSP: ffff8880983cf870
RIP: fq_codel_drop net/sched/sch_fq_codel.c:173 [inline] RSP: ffff8880983cf870
RIP: fq_codel_enqueue+0x951/0x1070 net/sched/sch_fq_codel.c:235 RSP: ffff8880983cf870
---[ end trace 6cc2612bf1625d36 ]---