------------[ cut here ]------------
len > ((int)(~0U >> 1))
WARNING: ./include/linux/skbuff.h:2864 at qdisc_pkt_len_segs_init+0x4b4/0xa30, CPU#0: syz.0.17632/7711
Modules linked in:
CPU: 0 UID: 0 PID: 7711 Comm: syz.0.17632 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+0x4b4/0xa30
Code: 00 00 02 00 31 ff e8 6b be 16 f8 81 e3 00 00 02 00 0f 85 fd 00 00 00 e8 5a b9 16 f8 45 89 e7 e9 2c ff ff ff e8 4d b9 16 f8 90 <0f> 0b 90 e9 ee fd ff ff 44 89 e7 89 de e8 4a bb 16 f8 41 39 dc 0f
RSP: 0018:ffffc90000007960 EFLAGS: 00010246
RAX: ffffffff89b101d3 RBX: 0000000000000003 RCX: ffff8881a085bc00
RDX: 8000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff88810f33f380 R08: 0000000000000100 R09: 0000000000000000
R10: ffffc90000007b30 R11: fffff52000000f74 R12: 00000000ffffff9b
R13: dffffc0000000000 R14: 1ffff11021e67e8b R15: ffff88811a0ed158
FS:  00007fe7493dd6c0(0000) GS:ffff88818d6d9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000018f304000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __netif_receive_skb_core+0x13b0/0x30c0
 process_backlog+0x727/0x18b0
 __napi_poll+0xaa/0x330
 net_rx_action+0x61d/0xf50
 handle_softirqs+0x226/0x860
 do_softirq+0x77/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x140
 tun_rx_batched+0x616/0x790
 tun_get_user+0x2be0/0x44d0
 tun_chr_write_iter+0x113/0x200
 vfs_write+0x612/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe74859e159
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:00007fe7493dd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe748825fa0 RCX: 00007fe74859e159
RDX: 000000000000fdef RSI: 00002000000006c0 RDI: 0000000000000006
RBP: 00007fe748635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe748826038 R14: 00007fe748825fa0 R15: 00007ffe06bb54b8
 </TASK>
