------------[ cut here ]------------
memcpy: detected field-spanning write (size 32) of single field "&new->sel" at net/sched/cls_u32.c:855 (size 16)
WARNING: net/sched/cls_u32.c:855 at u32_init_knode net/sched/cls_u32.c:855 [inline], CPU#0: syz.0.0/5321
WARNING: net/sched/cls_u32.c:855 at u32_change+0x1da0/0x2720 net/sched/cls_u32.c:921, CPU#0: syz.0.0/5321
Modules linked in:
CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:u32_init_knode net/sched/cls_u32.c:855 [inline]
RIP: 0010:u32_change+0x1daf/0x2720 net/sched/cls_u32.c:921
Code: 3d 98 ef 41 06 01 75 33 e8 5e ff 0b f8 eb 50 e8 57 ff 0b f8 48 8d 3d e0 21 67 06 b9 10 00 00 00 4c 89 f6 48 c7 c2 e0 98 e1 8c <67> 48 0f b9 3a e9 af ee ff ff e8 32 ff 0b f8 eb 24 e8 2b ff 0b f8
RSP: 0018:ffffc9000daeefc0 EFLAGS: 00010287
RAX: ffffffff89b9b129 RBX: ffff88801f24fc00 RCX: 0000000000000010
RDX: ffffffff8ce198e0 RSI: 0000000000000020 RDI: ffffffff9020d310
RBP: ffffc9000daef178 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff20237d7 R12: ffff88801f1f78e8
R13: 0000000000000001 R14: 0000000000000020 R15: 0000000000000001
FS:  00007f01cded76c0(0000) GS:ffff88808ca55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006040 CR3: 0000000044a02000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 tc_new_tfilter+0xff8/0x1780 net/sched/cls_api.c:2430
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2592
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646
 __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2735
 __do_sys_sendmmsg net/socket.c:2762 [inline]
 __se_sys_sendmmsg net/socket.c:2759 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2759
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f01ccf9c799
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:00007f01cded6fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f01cd215fa0 RCX: 00007f01ccf9c799
RDX: 04000000000001f2 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f01cd032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f01cd216038 R14: 00007f01cd215fa0 R15: 00007ffd876dd0f8
 </TASK>
----------------
Code disassembly (best guess):
   0:	3d 98 ef 41 06       	cmp    $0x641ef98,%eax
   5:	01 75 33             	add    %esi,0x33(%rbp)
   8:	e8 5e ff 0b f8       	call   0xf80bff6b
   d:	eb 50                	jmp    0x5f
   f:	e8 57 ff 0b f8       	call   0xf80bff6b
  14:	48 8d 3d e0 21 67 06 	lea    0x66721e0(%rip),%rdi        # 0x66721fb
  1b:	b9 10 00 00 00       	mov    $0x10,%ecx
  20:	4c 89 f6             	mov    %r14,%rsi
  23:	48 c7 c2 e0 98 e1 8c 	mov    $0xffffffff8ce198e0,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 af ee ff ff       	jmp    0xffffeee3
  34:	e8 32 ff 0b f8       	call   0xf80bff6b
  39:	eb 24                	jmp    0x5f
  3b:	e8 2b ff 0b f8       	call   0xf80bff6b