------------[ cut here ]------------ kernel BUG at net/core/dev.c:3233! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8736 Comm: syz-executor583 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_checksum_help+0x4b4/0x5b0 net/core/dev.c:3233 Code: fa 45 89 ec e9 59 ff ff ff e8 68 c0 7b fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 53 c0 7b fa 0f 0b e8 4c c0 7b fa <0f> 0b 4c 89 f7 e8 62 b5 be fa e9 79 fb ff ff e8 68 b5 be fa e9 28 RSP: 0018:ffffc900022bf120 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000000003d2 RCX: 0000000000000000 RDX: ffff888028ff0000 RSI: ffffffff86f6ff54 RDI: 0000000000000003 RBP: ffff88801c33c640 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff86f6fe20 R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff88801c33c6c0 R15: 00000000000003d2 FS: 00000000018d7300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002180 CR3: 000000002d8d7000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_csum_hwoffload_help+0x126/0x1e0 net/core/dev.c:3635 validate_xmit_skb+0xbd5/0xee0 net/core/dev.c:3678 __dev_queue_xmit+0x988/0x2e00 net/core/dev.c:4154 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip_finish_output2+0xeb6/0x21b0 net/ipv4/ip_output.c:230 __ip_finish_output net/ipv4/ip_output.c:308 [inline] __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:290 ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:126 iptunnel_xmit+0x5a3/0x9c0 net/ipv4/ip_tunnel_core.c:82 geneve_xmit_skb drivers/net/geneve.c:959 [inline] geneve_xmit+0xde1/0x2f60 drivers/net/geneve.c:1059 __netdev_start_xmit include/linux/netdevice.h:4765 [inline] netdev_start_xmit include/linux/netdevice.h:4779 [inline] xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3590 sch_direct_xmit+0x2e1/0xbd0 net/sched/sch_generic.c:313 qdisc_restart net/sched/sch_generic.c:376 [inline] __qdisc_run+0x4ba/0x15f0 net/sched/sch_generic.c:384 __dev_xmit_skb net/core/dev.c:3824 [inline] __dev_queue_xmit+0x1a60/0x2e00 net/core/dev.c:4131 packet_snd net/packet/af_packet.c:3006 [inline] packet_sendmsg+0x2405/0x52b0 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 __sys_sendto+0x21c/0x320 net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1983 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x443979 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffec61c3788 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443979 RDX: 0000000000003287 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000002ff R10: 0000000004000002 R11: 0000000000000246 R12: 00007ffec61c37b0 R13: 00000000000f4240 R14: 0000000000011a33 R15: 00007ffec61c37a4 Modules linked in: ---[ end trace be1de1fed15a0ea3 ]--- RIP: 0010:skb_checksum_help+0x4b4/0x5b0 net/core/dev.c:3233 Code: fa 45 89 ec e9 59 ff ff ff e8 68 c0 7b fa 48 89 ef 41 bc ea ff ff ff e8 2a f9 ff ff eb c7 e8 53 c0 7b fa 0f 0b e8 4c c0 7b fa <0f> 0b 4c 89 f7 e8 62 b5 be fa e9 79 fb ff ff e8 68 b5 be fa e9 28 RSP: 0018:ffffc900022bf120 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 00000000000003d2 RCX: 0000000000000000 RDX: ffff888028ff0000 RSI: ffffffff86f6ff54 RDI: 0000000000000003 RBP: ffff88801c33c640 R08: 00000000000003d4 R09: 0000000000000000 R10: ffffffff86f6fe20 R11: 0000000000000000 R12: 00000000000000e0 R13: 00000000000003d4 R14: ffff88801c33c6c0 R15: 00000000000003d2 FS: 00000000018d7300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002180 CR3: 000000002d8d7000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400