------------[ cut here ]------------
len > ((int)(~0U >> 1))
WARNING: ./include/linux/skbuff.h:2847 at pskb_may_pull_reason include/linux/skbuff.h:2847 [inline], CPU#0: syz.1.2318/13130
WARNING: ./include/linux/skbuff.h:2847 at pskb_network_may_pull_reason include/linux/skbuff.h:3277 [inline], CPU#0: syz.1.2318/13130
WARNING: ./include/linux/skbuff.h:2847 at pskb_inet_may_pull_reason include/net/ip_tunnels.h:480 [inline], CPU#0: syz.1.2318/13130
WARNING: ./include/linux/skbuff.h:2847 at pskb_inet_may_pull include/net/ip_tunnels.h:485 [inline], CPU#0: syz.1.2318/13130
WARNING: ./include/linux/skbuff.h:2847 at ip6_tnl_start_xmit+0x1066/0x1540 net/ipv6/ip6_tunnel.c:1434, CPU#0: syz.1.2318/13130
Modules linked in:
CPU: 0 UID: 0 PID: 13130 Comm: syz.1.2318 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pskb_may_pull_reason include/linux/skbuff.h:2847 [inline]
RIP: 0010:pskb_network_may_pull_reason include/linux/skbuff.h:3277 [inline]
RIP: 0010:pskb_inet_may_pull_reason include/net/ip_tunnels.h:480 [inline]
RIP: 0010:pskb_inet_may_pull include/net/ip_tunnels.h:485 [inline]
RIP: 0010:ip6_tnl_start_xmit+0x1066/0x1540 net/ipv6/ip6_tunnel.c:1434
Code: f7 be 03 00 00 00 ba 04 00 00 00 e8 c4 32 b2 ff 48 8b 5c 24 18 e9 23 ff ff ff e8 65 51 1c f7 e9 19 ff ff ff e8 5b 51 1c f7 90 <0f> 0b 90 e9 2c f1 ff ff 44 89 e7 44 89 fe e8 57 53 1c f7 45 39 fc
RSP: 0018:ffffc900034ef180 EFLAGS: 00010283
RAX: ffffffff8aab8aa5 RBX: 1ffff1100623d48e RCX: 0000000000080000
RDX: ffffc9000e15c000 RSI: 0000000000003c88 RDI: 0000000000003c89
RBP: ffffc900034ef2d0 R08: ffff88801fb28000 R09: 0000000000000002
R10: 0000000000004888 R11: ffffffff8aab7a40 R12: 00000000ffffffc0
R13: dffffc0000000000 R14: ffff8880311ea498 R15: 0000000000000000
FS:  00007f50c5f836c0(0000) GS:ffff888124cc8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c40f2d2 CR3: 0000000028f64000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000063235cd5
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __netdev_start_xmit include/linux/netdevice.h:5429 [inline]
 netdev_start_xmit include/linux/netdevice.h:5438 [inline]
 __dev_direct_xmit+0x4b6/0x730 net/core/dev.c:4990
 __xsk_generic_xmit net/xdp/xsk.c:1280 [inline]
 xsk_generic_xmit+0x272b/0x4730 net/xdp/xsk.c:1336
 xsk_poll+0x326/0x670 net/xdp/xsk.c:1464
 sock_poll+0x338/0x3f0 net/socket.c:1514
 vfs_poll include/linux/poll.h:82 [inline]
 select_poll_one fs/select.c:480 [inline]
 do_select+0x1067/0x17f0 fs/select.c:536
 core_sys_select+0x86d/0xb40 fs/select.c:677
 do_pselect fs/select.c:770 [inline]
 __do_sys_pselect6 fs/select.c:809 [inline]
 __se_sys_pselect6+0x267/0x320 fs/select.c:800
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50c519e159
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:00007f50c5f83028 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: ffffffffffffffda RBX: 00007f50c5426090 RCX: 00007f50c519e159
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: 0000000000000040
RBP: 00007f50c523506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f50c5426128 R14: 00007f50c5426090 R15: 00007f50c554fa48
 </TASK>