------------[ cut here ]------------
len >= 65536u
WARNING: ./include/linux/udp.h:49 at udp_set_len_short include/linux/udp.h:49 [inline], CPU#0: syz.4.2634/16784
WARNING: ./include/linux/udp.h:49 at udp_v6_send_skb+0xd3b/0x13a0 net/ipv6/udp.c:1375, CPU#0: syz.4.2634/16784
Modules linked in:
CPU: 0 UID: 0 PID: 16784 Comm: syz.4.2634 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:udp_set_len_short include/linux/udp.h:49 [inline]
RIP: 0010:udp_v6_send_skb+0xd3b/0x13a0 net/ipv6/udp.c:1375
Code: 42 0f b6 04 38 84 c0 0f 85 37 06 00 00 41 0f b7 1e e9 60 f3 ff ff e8 b4 35 44 f7 90 0f 0b 90 e9 02 f4 ff ff e8 a6 35 44 f7 90 <0f> 0b 90 e9 e9 f4 ff ff e8 98 35 44 f7 90 0f 0b 90 e9 94 f5 ff ff
RSP: 0018:ffffc9000e61f888 EFLAGS: 00010293
RAX: ffffffff8a82ccea RBX: ffff88803d8ce400 RCX: ffff88807e3edd00
RDX: 0000000000000000 RSI: 000000000003ff60 RDI: 000000000000ffff
RBP: 000000000000200e R08: ffff88807e3edd00 R09: 0000000000000003
R10: 000000000000000b R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888050fdda00 R14: 000000000003ff60 R15: ffff88803d8ce402
FS:  00007fea0dfa86c0(0000) GS:ffff888124f58000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea0d1eb7c0 CR3: 000000004d3c0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udp_v6_push_pending_frames+0xa2/0x140 net/ipv6/udp.c:1451
 udpv6_sendmsg+0xfa0/0x2610 net/ipv6/udp.c:1740
 sock_sendmsg_nosec+0x90/0x180 net/socket.c:775
 __sock_sendmsg net/socket.c:790 [inline]
 __sys_sendto+0x408/0x5a0 net/socket.c:2252
 __do_sys_sendto net/socket.c:2259 [inline]
 __se_sys_sendto net/socket.c:2255 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2255
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fea0d19e0d9
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:00007fea0dfa8028 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fea0d426180 RCX: 00007fea0d19e0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fea0d235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004010 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea0d426218 R14: 00007fea0d426180 R15: 00007fff9d5b54c8
 </TASK>