audit: type=1400 audit(1590149076.216:8): avc:  denied  { execmem } for  pid=6330 comm="syz-executor005" 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: 6330 Comm: syz-executor005 Not tainted 4.14.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a07ec2c0 task.stack: ffff888082350000
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+0x94b/0x1050 net/sched/sch_fq_codel.c:235
RSP: 0018:ffff888082357650 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88808668b0c0
RDX: 0000000000000000 RSI: ffff8880823577e0 RDI: 0000000000000000
RBP: ffff888082357730 R08: ffff88821fff705c R09: ffff88821fff7048
R10: ffff88821fff7050 R11: 00000008fd9c5d65 R12: ffff8880823577e0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888086680180
FS:  0000000002039880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b4cc769270 CR3: 00000000a641f000 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+0x13c6/0x25a0 net/core/dev.c:3493
 packet_snd.isra.0+0x135f/0x20b0 net/packet/af_packet.c:3012
 packet_sendmsg+0xfd2/0x2340 net/packet/af_packet.c:3037
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 sock_write_iter+0x22c/0x370 net/socket.c:925
 call_write_iter include/linux/fs.h:1778 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x44e/0x630 fs/read_write.c:482
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x440599
RSP: 002b:00007fffe2e19b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004a173e RCX: 0000000000440599
RDX: 000000000000006c RSI: 00000000200003c0 RDI: 0000000000000005
RBP: 54c6c2ff093a6d32 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000010000
R13: 0000000000401eb0 R14: 0000000000000000 R15: 0000000000000000
Code: 8b 54 24 68 3b 54 24 60 0f 83 bf 00 00 00 e8 8d 41 43 fc 48 8b 44 24 40 80 38 00 0f 85 63 05 00 00 49 8b 07 48 89 c2 48 c1 ea 03 <42> 80 3c 2a 00 0f 85 5b 05 00 00 48 8b 10 48 8d 78 28 49 89 17 
RIP: dequeue_head net/sched/sch_fq_codel.c:125 [inline] RSP: ffff888082357650
RIP: fq_codel_drop net/sched/sch_fq_codel.c:173 [inline] RSP: ffff888082357650
RIP: fq_codel_enqueue+0x94b/0x1050 net/sched/sch_fq_codel.c:235 RSP: ffff888082357650
---[ end trace 3f9b7a73f2b6579c ]---