------------[ cut here ]------------ kernel BUG at net/ipv4/ip_output.c:777! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 20772 Comm: syz-executor0 Not tainted 4.20.0+ #13 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ip_do_fragment+0x2317/0x2950 net/ipv4/ip_output.c:777 Code: 8b 85 f0 fe ff ff e9 91 e9 ff ff 4c 89 f7 e8 80 a6 34 fb e9 79 ea ff ff 4c 89 f7 e8 73 a6 34 fb e9 e0 e6 ff ff e8 89 b4 f0 fa <0f> 0b 48 89 df e8 9f a6 34 fb e9 a0 e9 ff ff 4c 89 ef 48 89 95 f0 RSP: 0018:ffff88806330eb40 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff88809c0a8c80 RCX: ffffc90005dc9000 RDX: 0000000000001d7b RSI: ffffffff869140c7 RDI: 0000000000000005 RBP: ffff88806330ec98 R08: ffff88805f2c4180 R09: ffffed1010d49e7d R10: ffffed1010d49e7c R11: ffff888086a4f3e3 R12: ffff88809c0a8bc0 R13: ffff88809c0a8c74 R14: 00000000fffffff2 R15: dffffc0000000000 FS: 00007f2488e42700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d7708 CR3: 00000000972f9000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ip_fragment.constprop.0+0x176/0x240 net/ipv4/ip_output.c:550 ip_finish_output+0x69f/0xf60 net/ipv4/ip_output.c:315 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x226/0x880 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out+0xc4/0x1b0 net/ipv4/ip_output.c:124 iptunnel_xmit+0x58e/0x980 net/ipv4/ip_tunnel_core.c:91 ip_tunnel_xmit+0x153b/0x3b3c net/ipv4/ip_tunnel.c:778 __gre_xmit+0x5e9/0x9a0 net/ipv4/ip_gre.c:453 ipgre_xmit+0x5b0/0xd60 net/ipv4/ip_gre.c:710 __netdev_start_xmit include/linux/netdevice.h:4382 [inline] netdev_start_xmit include/linux/netdevice.h:4391 [inline] xmit_one net/core/dev.c:3278 [inline] dev_hard_start_xmit+0x261/0xc70 net/core/dev.c:3294 __dev_queue_xmit+0x2f8a/0x3a60 net/core/dev.c:3864 dev_queue_xmit+0x18/0x20 net/core/dev.c:3897 __bpf_tx_skb net/core/filter.c:2014 [inline] __bpf_redirect_common net/core/filter.c:2052 [inline] __bpf_redirect+0x5dc/0xb70 net/core/filter.c:2059 ____bpf_clone_redirect net/core/filter.c:2092 [inline] bpf_clone_redirect+0x2ca/0x470 net/core/filter.c:2064 bpf_prog_bebbfe2050753572+0x77/0x1000 Modules linked in: ---[ end trace 52cc13e37a990236 ]--- RIP: 0010:ip_do_fragment+0x2317/0x2950 net/ipv4/ip_output.c:777 Code: 8b 85 f0 fe ff ff e9 91 e9 ff ff 4c 89 f7 e8 80 a6 34 fb e9 79 ea ff ff 4c 89 f7 e8 73 a6 34 fb e9 e0 e6 ff ff e8 89 b4 f0 fa <0f> 0b 48 89 df e8 9f a6 34 fb e9 a0 e9 ff ff 4c 89 ef 48 89 95 f0 RSP: 0018:ffff88806330eb40 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff88809c0a8c80 RCX: ffffc90005dc9000 RDX: 0000000000001d7b RSI: ffffffff869140c7 RDI: 0000000000000005 RBP: ffff88806330ec98 R08: ffff88805f2c4180 R09: ffffed1010d49e7d R10: ffffed1010d49e7c R11: ffff888086a4f3e3 R12: ffff88809c0a8bc0 R13: ffff88809c0a8c74 R14: 00000000fffffff2 R15: dffffc0000000000 FS: 00007f2488e42700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d7708 CR3: 00000000972f9000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600