------------[ cut here ]------------
WARNING: CPU: 1 PID: 4656 at net/core/dev.c:3261 skb_checksum_help+0x13c/0x1d4 net/core/dev.c:3261
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 PID: 4656 Comm: syz-executor.0 Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<817da458>] (dump_backtrace) from [<817da54c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:826229c4 r5:60000093 r4:81f9d8a4
[<817da534>] (show_stack) from [<817f7028>] (__dump_stack lib/dump_stack.c:88 [inline])
[<817da534>] (show_stack) from [<817f7028>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<817f6fe0>] (dump_stack_lvl) from [<817f704c>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:82850d14
[<817f7034>] (dump_stack) from [<817db044>] (panic+0x120/0x370 kernel/panic.c:340)
[<817daf24>] (panic) from [<80241fd0>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
 r3:8260c488 r2:00000001 r1:81f86998 r0:81f8e3a8
 r7:81333510
[<80241f4c>] (check_panic_on_warn) from [<802421c4>] (__warn+0x7c/0x180 kernel/panic.c:673)
[<80242148>] (__warn) from [<802423a0>] (warn_slowpath_fmt+0xd8/0x1d8 kernel/panic.c:697)
 r8:00000009 r7:00000cbd r6:82130de8 r5:8260c960 r4:824adf7c
[<802422cc>] (warn_slowpath_fmt) from [<81333510>] (skb_checksum_help+0x13c/0x1d4 net/core/dev.c:3261)
 r10:0000002f r9:00000000 r8:85d4e400 r7:00000000 r6:0000081f r5:827e21ac
 r4:8bb87180
[<813333d4>] (skb_checksum_help) from [<814c7ae8>] (ip_do_fragment+0x424/0x704 net/ipv4/ip_output.c:775)
 r7:00000000 r6:00000000 r5:84f70c40 r4:8bb87180
[<814c76c4>] (ip_do_fragment) from [<814c7e24>] (ip_fragment.constprop.0+0x5c/0x104 net/ipv4/ip_output.c:582)
 r10:0000002f r9:00000000 r8:8bb87300 r7:000005dc r6:00000000 r5:84f70c40
 r4:8bb87180
[<814c7dc8>] (ip_fragment.constprop.0) from [<814c8010>] (ip_finish_output_gso net/ipv4/ip_output.c:280 [inline])
[<814c7dc8>] (ip_fragment.constprop.0) from [<814c8010>] (__ip_finish_output net/ipv4/ip_output.c:302 [inline])
[<814c7dc8>] (ip_fragment.constprop.0) from [<814c8010>] (__ip_finish_output+0x144/0x184 net/ipv4/ip_output.c:289)
 r5:84f70c40 r4:00000000
[<814c7ecc>] (__ip_finish_output) from [<814c807c>] (ip_finish_output+0x2c/0xcc net/ipv4/ip_output.c:317)
 r9:85d4e400 r8:84747800 r7:84f70c40 r6:00000000 r5:8bb87240 r4:00000000
[<814c8050>] (ip_finish_output) from [<814c81f4>] (NF_HOOK_COND include/linux/netfilter.h:292 [inline])
[<814c8050>] (ip_finish_output) from [<814c81f4>] (ip_output+0xd8/0x170 net/ipv4/ip_output.c:431)
 r7:87283000 r6:00000000 r5:84f70c40 r4:8bb87240
[<814c811c>] (ip_output) from [<814c92fc>] (dst_output include/net/dst.h:458 [inline])
[<814c811c>] (ip_output) from [<814c92fc>] (ip_local_out+0x40/0x44 net/ipv4/ip_output.c:126)
 r8:84f70c40 r7:00000000 r6:00000000 r5:84f70c40 r4:8bb87240
[<814c92bc>] (ip_local_out) from [<81530898>] (iptunnel_xmit+0x148/0x268 net/ipv4/ip_tunnel_core.c:82)
 r7:00000000 r6:84747800 r5:00000000 r4:8bb87240
[<81530750>] (iptunnel_xmit) from [<8153afe0>] (ip_tunnel_xmit+0x800/0xae4 net/ipv4/ip_tunnel.c:831)
 r10:85d4e400 r9:00000024 r8:0000000f r7:0000000e r6:00000024 r5:84747800
 r4:8bb87240
[<8153a7e0>] (ip_tunnel_xmit) from [<8154b9c0>] (__gre_xmit+0x140/0x234 net/ipv4/ip_gre.c:469)
 r10:00000004 r9:00000000 r8:00000008 r7:85e50048 r6:84747800 r5:8bb87240
 r4:00000000
[<8154b880>] (__gre_xmit) from [<8154c3ec>] (ipgre_xmit+0x19c/0x22c net/ipv4/ip_gre.c:661)
 r10:8260ee7c r9:00000000 r8:83293ac0 r7:84747800 r6:85e50048 r5:84747800
 r4:8bb87240
[<8154c250>] (ipgre_xmit) from [<8133b68c>] (__netdev_start_xmit include/linux/netdevice.h:4918 [inline])
[<8154c250>] (ipgre_xmit) from [<8133b68c>] (netdev_start_xmit include/linux/netdevice.h:4932 [inline])
[<8154c250>] (ipgre_xmit) from [<8133b68c>] (xmit_one net/core/dev.c:3578 [inline])
[<8154c250>] (ipgre_xmit) from [<8133b68c>] (dev_hard_start_xmit+0xc0/0x2a4 net/core/dev.c:3594)
 r7:84747800 r6:00000000 r5:8bb87240 r4:81c3e444
[<8133b5cc>] (dev_hard_start_xmit) from [<8133c480>] (__dev_queue_xmit+0xaf8/0xdc8 net/core/dev.c:4244)
 r10:00000006 r9:0000081f r8:824b1288 r7:84b54c00 r6:84747800 r5:e04bdc60
 r4:8bb87240
[<8133b988>] (__dev_queue_xmit) from [<8163507c>] (dev_queue_xmit include/linux/netdevice.h:3088 [inline])
[<8133b988>] (__dev_queue_xmit) from [<8163507c>] (packet_xmit net/packet/af_packet.c:276 [inline])
[<8133b988>] (__dev_queue_xmit) from [<8163507c>] (packet_xmit+0x9c/0x100 net/packet/af_packet.c:273)
 r10:85e53f00 r9:859f1800 r8:8bb87240 r7:0000000a r6:84747800 r5:00003000
 r4:8bb87240
[<81634fe0>] (packet_xmit) from [<816387d0>] (packet_snd net/packet/af_packet.c:3081 [inline])
[<81634fe0>] (packet_xmit) from [<816387d0>] (packet_sendmsg+0xec8/0x1448 net/packet/af_packet.c:3113)
 r7:0000000a r6:84747800 r5:00003000 r4:859f1800
[<81637908>] (packet_sendmsg) from [<8130db48>] (sock_sendmsg_nosec net/socket.c:724 [inline])
[<81637908>] (packet_sendmsg) from [<8130db48>] (sock_sendmsg+0x44/0x78 net/socket.c:747)
 r10:e04bddd4 r9:00000000 r8:00000000 r7:00000000 r6:852a3900 r5:e04bdf30
 r4:00000000
[<8130db04>] (sock_sendmsg) from [<8130e660>] (____sys_sendmsg+0x210/0x2bc net/socket.c:2503)
 r7:00000000 r6:852a3900 r5:00000000 r4:e04bdf30
[<8130e450>] (____sys_sendmsg) from [<81310290>] (___sys_sendmsg+0x74/0xac net/socket.c:2557)
 r10:00000128 r9:83293ac0 r8:00000000 r7:00000000 r6:852a3900 r5:e04bdf30
 r4:00000000
[<8131021c>] (___sys_sendmsg) from [<813106e4>] (__sys_sendmsg net/socket.c:2586 [inline])
[<8131021c>] (___sys_sendmsg) from [<813106e4>] (__do_sys_sendmsg net/socket.c:2595 [inline])
[<8131021c>] (___sys_sendmsg) from [<813106e4>] (sys_sendmsg+0x58/0xa0 net/socket.c:2593)
 r8:80200288 r7:00000128 r6:00000000 r5:20002ac0 r4:852a3900
[<8131068c>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xe04bdfa8 to 0xe04bdff0)
dfa0:                   00000000 00000000 00000003 20002ac0 00000000 00000000
dfc0: 00000000 00000000 0014c2b8 00000128 7eb653c2 76bd36d0 7eb65534 76bd320c
dfe0: 76bd3020 76bd3010 00017004 0004dfb0
 r6:0014c2b8 r5:00000000 r4:00000000
Rebooting in 86400 seconds..