------------[ cut here ]------------
kernel BUG at net/ipv4/ip_output.c:777!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
kobject: 'loop0' (00000000bdb6d262): kobject_uevent_env
CPU: 0 PID: 13887 Comm: syz-executor5 Not tainted 4.20.0+ #110
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip_do_fragment+0x2419/0x2a90 net/ipv4/ip_output.c:777
Code: 8b 8d 70 fe ff ff e9 82 e8 ff ff 4c 89 ef e8 0e 2c 2e fb e9 64 e9 ff ff 4c 89 f7 e8 01 2c 2e fb e9 dc e5 ff ff e8 27 9a ea fa <0f> 0b 4c 89 e7 e8 ed 2b 2e fb e9 a0 e8 ff ff 4c 89 f7 89 8d 70 fe
kobject: 'loop0' (00000000bdb6d262): fill_kobj_path: path = '/devices/virtual/block/loop0'
RSP: 0018:ffff88805f5de500 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880a93b5b40 RCX: ffffc90005fea000
RDX: 0000000000040000 RSI: ffffffff86970bc9 RDI: 0000000000000005
RBP: ffff88805f5de6d8 R08: ffff88809bfc4100 R09: ffffed100bcb9f8a
R10: ffffed100bcb9f8c R11: ffff88805e5cfc63 R12: ffff8880a93b5bf4
R13: 00000000fffffff2 R14: ffff8880a93b5c00 R15: dffffc0000000000
FS:  00007f87e81be700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073c000 CR3: 000000005b3e3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 ip_fragment.constprop.53+0x179/0x240 net/ipv4/ip_output.c:550
 ip_finish_output+0x6ae/0xf90 net/ipv4/ip_output.c:315
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip_output+0x217/0x8d0 net/ipv4/ip_output.c:405
 dst_output include/net/dst.h:444 [inline]
 ip_local_out+0xc5/0x1b0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x599/0x990 net/ipv4/ip_tunnel_core.c:91
 ip_tunnel_xmit+0x15a4/0x3be4 net/ipv4/ip_tunnel.c:787
 __gre_xmit+0x5e9/0x980 net/ipv4/ip_gre.c:453
 ipgre_xmit+0x3e1/0xba0 net/ipv4/ip_gre.c:707
 __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+0x286/0xc80 net/core/dev.c:3294
 __dev_queue_xmit+0x2f62/0x3ac0 net/core/dev.c:3864
kobject: 'loop3' (0000000081764ac2): kobject_uevent_env
kobject: 'loop3' (0000000081764ac2): fill_kobj_path: path = '/devices/virtual/block/loop3'
 dev_queue_xmit+0x17/0x20 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+0x5ca/0xb40 net/core/filter.c:2059
 ____bpf_clone_redirect net/core/filter.c:2092 [inline]
 bpf_clone_redirect+0x2e4/0x480 net/core/filter.c:2064
 bpf_prog_bebbfe2050753572+0x3a5/0x1000
Modules linked in:
---[ end trace d968a4b4071bf6bd ]---
RIP: 0010:ip_do_fragment+0x2419/0x2a90 net/ipv4/ip_output.c:777
Code: 8b 8d 70 fe ff ff e9 82 e8 ff ff 4c 89 ef e8 0e 2c 2e fb e9 64 e9 ff ff 4c 89 f7 e8 01 2c 2e fb e9 dc e5 ff ff e8 27 9a ea fa <0f> 0b 4c 89 e7 e8 ed 2b 2e fb e9 a0 e8 ff ff 4c 89 f7 89 8d 70 fe
RSP: 0018:ffff88805f5de500 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880a93b5b40 RCX: ffffc90005fea000
RDX: 0000000000040000 RSI: ffffffff86970bc9 RDI: 0000000000000005
RBP: ffff88805f5de6d8 R08: ffff88809bfc4100 R09: ffffed100bcb9f8a
R10: ffffed100bcb9f8c R11: ffff88805e5cfc63 R12: ffff8880a93b5bf4
R13: 00000000fffffff2 R14: ffff8880a93b5c00 R15: dffffc0000000000
FS:  00007f87e81be700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073c000 CR3: 000000005b3e3000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600