------------[ cut here ]------------
kernel BUG at net/ipv4/ip_output.c:777!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 27576 Comm: syz-executor2 Not tainted 4.20.0-rc7+ #189
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip_do_fragment+0x240c/0x2a90 net/ipv4/ip_output.c:777
Code: ff 48 89 cf e8 d5 4b 31 fb e9 f5 ea ff ff 48 89 df e8 08 4c 31 fb e9 1b e7 ff ff e8 5e 4c 31 fb e9 b0 e6 ff ff e8 34 5e ed fa <0f> 0b 4c 89 f7 e8 aa 4b 31 fb e9 48 e6 ff ff 4c 89 e7 e8 9d 4b 31
kobject: 'loop4' (00000000455c0e53): kobject_uevent_env
RSP: 0018:ffff8881950563a0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8881bb294e80 RCX: ffffc9000a018000
RDX: 0000000000040000 RSI: ffffffff8691c7fc RDI: 0000000000000005
RBP: ffff888195056578 R08: ffff8881964e0280 R09: ffffed103728ccba
R10: ffffed103728ccbc R11: ffff8881b94665e3 R12: ffff8881bb294f34
kobject: 'loop4' (00000000455c0e53): fill_kobj_path: path = '/devices/virtual/block/loop4'
R13: 00000000fffffff2 R14: ffff8881bb294f40 R15: dffffc0000000000
FS:  00007fb49d4d9700(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30bb5c8c20 CR3: 00000001cd151000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
netlink: 10 bytes leftover after parsing attributes in process `syz-executor0'.
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
kobject: 'loop4' (00000000455c0e53): kobject_uevent_env
kobject: 'loop4' (00000000455c0e53): fill_kobj_path: path = '/devices/virtual/block/loop4'
 ip_fragment.constprop.53+0x179/0x240 net/ipv4/ip_output.c:550
kobject: 'loop3' (000000009cc28838): kobject_uevent_env
 ip_finish_output+0x6ae/0xfa0 net/ipv4/ip_output.c:315
kobject: 'loop3' (000000009cc28838): fill_kobj_path: path = '/devices/virtual/block/loop3'
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip_mc_output+0x2be/0x15b0 net/ipv4/ip_output.c:390
kobject: 'loop4' (00000000455c0e53): kobject_uevent_env
kobject: 'loop4' (00000000455c0e53): fill_kobj_path: path = '/devices/virtual/block/loop4'
netlink: 10 bytes leftover after parsing attributes in process `syz-executor0'.
 dst_output include/net/dst.h:444 [inline]
 ip_local_out+0xc5/0x1b0 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x604/0x980 net/ipv4/ip_tunnel_core.c:91
 ip_tunnel_xmit+0x15a4/0x3be4 net/ipv4/ip_tunnel.c:787
kobject: 'loop0' (000000000dba49ff): kobject_uevent_env
kobject: 'loop0' (000000000dba49ff): fill_kobj_path: path = '/devices/virtual/block/loop0'
 __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+0x286/0xc70 net/core/dev.c:3294
kobject: 'loop1' (00000000d9bcebfe): kobject_uevent_env
 __dev_queue_xmit+0x2f5f/0x3ac0 net/core/dev.c:3864
kobject: 'loop1' (00000000d9bcebfe): fill_kobj_path: path = '/devices/virtual/block/loop1'
netlink: 10 bytes leftover after parsing attributes in process `syz-executor1'.
kobject: 'loop3' (000000009cc28838): kobject_uevent_env
kobject: 'loop3' (000000009cc28838): 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+0x478/0x1000
Modules linked in:
---[ end trace 3b5aa8d288c5143c ]---
RIP: 0010:ip_do_fragment+0x240c/0x2a90 net/ipv4/ip_output.c:777
Code: ff 48 89 cf e8 d5 4b 31 fb e9 f5 ea ff ff 48 89 df e8 08 4c 31 fb e9 1b e7 ff ff e8 5e 4c 31 fb e9 b0 e6 ff ff e8 34 5e ed fa <0f> 0b 4c 89 f7 e8 aa 4b 31 fb e9 48 e6 ff ff 4c 89 e7 e8 9d 4b 31
RSP: 0018:ffff8881950563a0 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8881bb294e80 RCX: ffffc9000a018000
RDX: 0000000000040000 RSI: ffffffff8691c7fc RDI: 0000000000000005
RBP: ffff888195056578 R08: ffff8881964e0280 R09: ffffed103728ccba
R10: ffffed103728ccbc R11: ffff8881b94665e3 R12: ffff8881bb294f34
R13: 00000000fffffff2 R14: ffff8881bb294f40 R15: dffffc0000000000
FS:  00007fb49d4d9700(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30bb5c8c20 CR3: 00000001cd151000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600