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: 0 PID: 28594 Comm: syz-executor.4 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805d4944c0 task.stack: ffff888048070000
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:ffff888048077650 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000b495000
RDX: 0000000000000000 RSI: ffffffff85176273 RDI: 0000000000000000
RBP: ffff888048077730 R08: ffff88821fff701c R09: ffff88821fff7008
R10: ffff88821fff7010 R11: 0000008042d6186c R12: ffff8880480777e0
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888055680840
FS:  00007f91feed7700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000742ad4 CR3: 0000000062660000 CR4: 00000000001426f0
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
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:273 [inline]
 __netlink_deliver_tap net/netlink/af_netlink.c:291 [inline]
 netlink_deliver_tap+0x604/0x860 net/netlink/af_netlink.c:302
 netlink_deliver_tap_kernel net/netlink/af_netlink.c:311 [inline]
 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
 netlink_unicast+0x485/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x64a/0xbb0 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 ___sys_sendmsg+0x349/0x840 net/socket.c:2062
 __sys_sendmmsg+0x129/0x330 net/socket.c:2152
 SYSC_sendmmsg net/socket.c:2183 [inline]
 SyS_sendmmsg+0x2f/0x50 net/socket.c:2178
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45cba9
RSP: 002b:00007f91feed6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00000000004fe340 RCX: 000000000045cba9
RDX: 04000000000002bc RSI: 0000000020000180 RDI: 0000000000000003
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000919 R14: 00000000004cbed9 R15: 00007f91feed76d4
Code: 8b 54 24 68 3b 54 24 60 0f 83 bf 00 00 00 e8 6d 43 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: ffff888048077650
RIP: fq_codel_drop net/sched/sch_fq_codel.c:173 [inline] RSP: ffff888048077650
RIP: fq_codel_enqueue+0x94b/0x1050 net/sched/sch_fq_codel.c:235 RSP: ffff888048077650
---[ end trace 6f0734b1204c525f ]---