------------[ cut here ]------------
len > ((int)(~0U >> 1))
WARNING: ./include/linux/skbuff.h:2863 at qdisc_pkt_len_segs_init+0x4c1/0xa30, CPU#0: syz.1.660/8325
Modules linked in:
CPU: 0 UID: 0 PID: 8325 Comm: syz.1.660 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:qdisc_pkt_len_segs_init+0x4c1/0xa30
Code: 81 e6 00 00 02 00 31 ff e8 ac 9b 48 f8 41 81 e6 00 00 02 00 0f 85 fb 00 00 00 e8 5a 97 48 f8 e9 5b 01 00 00 e8 50 97 48 f8 90 <0f> 0b 90 e9 e8 fd ff ff 44 89 e7 44 89 f6 e8 fc 98 48 f8 45 39 f4
RSP: 0018:ffffc900000075d0 EFLAGS: 00010246
RAX: ffffffff897d14e0 RBX: 1ffff11020e775fb RCX: ffff88810fee8000
RDX: 0000000000000100 RSI: 00000000fffffffe RDI: 0000000000000000
RBP: ffff8881073baf00 R08: ffff888114b7a067 R09: 1ffff1102296f40c
R10: dffffc0000000000 R11: ffffed102296f40d R12: 00000000fffffffe
R13: dffffc0000000000 R14: 0000000000000003 R15: ffff88810a7d0198
FS:  00007f1bdd6e06c0(0000) GS:ffff88818dc8a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bdd6dfff8 CR3: 0000000115884000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __netif_receive_skb_core+0x13bd/0x3170
 __netif_receive_skb_list_core+0x24d/0x810
 netif_receive_skb_list_internal+0x995/0xcf0
 napi_complete_done+0x299/0x730
 gro_cell_poll+0x5a9/0x5d0
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 tun_rx_batched+0x617/0x790
 tun_get_user+0x2bbc/0x43e0
 tun_chr_write_iter+0x113/0x200
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1bdc79cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1bdd6e0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1bdca16090 RCX: 00007f1bdc79cdd9
RDX: 000000000000007a RSI: 00002000000004c0 RDI: 0000000000000003
RBP: 00007f1bdc832d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1bdca16128 R14: 00007f1bdca16090 R15: 00007ffc45efdaf8
 </TASK>
