------------[ cut here ]------------
kernel BUG at net/core/dev.c:3311!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 3 PID: 18224 Comm: syz-executor.3 Not tainted 5.14.0-rc4-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:skb_checksum_help+0x4ad/0x5b0 net/core/dev.c:3311
Code: 41 5f c3 e8 a5 ba 5d fa 45 89 ec e9 59 ff ff ff e8 98 ba 5d fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 83 ba 5d fa <0f> 0b e8 7c ba 5d fa 0f 0b 4c 89 f7 e8 42 eb a3 fa e9 79 fb ff ff
RSP: 0018:ffffc900010675d8 EFLAGS: 00010216
RAX: 000000000000178c RBX: 00000000000000a2 RCX: ffffc90023294000
RDX: 0000000000040000 RSI: ffffffff8717e0dd RDI: 0000000000000003
RBP: ffff8880691a5680 R08: 0000000000000052 R09: 0000000000000000
R10: ffffffff8717dedf R11: 0000000000000000 R12: ffff8880691a56f4
R13: 00000000000011d3 R14: ffff8880691a5700 R15: 0000000000000060
FS:  0000000000000000(0000) GS:ffff88802cd00000(0063) knlGS:00000000f552eb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000095a8efc CR3: 0000000029657000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 netem_enqueue+0x2b41/0x3550 net/sched/sch_netem.c:510
 qdisc_enqueue include/net/sch_generic.h:845 [inline]
 netem_enqueue+0xe3b/0x3550 net/sched/sch_netem.c:607
 netem_enqueue+0x2048/0x3550 net/sched/sch_netem.c:483
 dev_qdisc_enqueue+0x40/0x300 net/core/dev.c:3854
 __dev_xmit_skb net/core/dev.c:3938 [inline]
 __dev_queue_xmit+0x1e28/0x3620 net/core/dev.c:4253
 packet_snd net/packet/af_packet.c:3016 [inline]
 packet_sendmsg+0x22fc/0x52b0 net/packet/af_packet.c:3044
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 __sys_sendto+0x21c/0x320 net/socket.c:2019
 __do_sys_sendto net/socket.c:2031 [inline]
 __se_sys_sendto net/socket.c:2027 [inline]
 __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2027
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f34549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f552e5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000171
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080
RDX: 0000000000003287 RSI: 0000000004000002 RDI: 0000000000000000
RBP: 00000000000002ff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace dedd49e32b1b66c3 ]---
RIP: 0010:skb_checksum_help+0x4ad/0x5b0 net/core/dev.c:3311
Code: 41 5f c3 e8 a5 ba 5d fa 45 89 ec e9 59 ff ff ff e8 98 ba 5d fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 83 ba 5d fa <0f> 0b e8 7c ba 5d fa 0f 0b 4c 89 f7 e8 42 eb a3 fa e9 79 fb ff ff
RSP: 0018:ffffc900010675d8 EFLAGS: 00010216
RAX: 000000000000178c RBX: 00000000000000a2 RCX: ffffc90023294000
RDX: 0000000000040000 RSI: ffffffff8717e0dd RDI: 0000000000000003
RBP: ffff8880691a5680 R08: 0000000000000052 R09: 0000000000000000
R10: ffffffff8717dedf R11: 0000000000000000 R12: ffff8880691a56f4
R13: 00000000000011d3 R14: ffff8880691a5700 R15: 0000000000000060
FS:  0000000000000000(0000) GS:ffff88802cd00000(0063) knlGS:00000000f552eb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000095a8efc CR3: 0000000029657000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400