------------[ cut here ]------------
WARNING: CPU: 0 PID: 13239 at net/core/dev.c:3268 skb_checksum_help+0x180/0x1d4 net/core/dev.c:3268
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 PID: 13239 Comm: syz-executor.0 Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<817da338>] (dump_backtrace) from [<817da42c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:826229c4 r5:60000093 r4:81f9d90c
[<817da414>] (show_stack) from [<817f6f14>] (__dump_stack lib/dump_stack.c:88 [inline])
[<817da414>] (show_stack) from [<817f6f14>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<817f6ecc>] (dump_stack_lvl) from [<817f6f38>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:82850d14
[<817f6f20>] (dump_stack) from [<817daf24>] (panic+0x120/0x370 kernel/panic.c:340)
[<817dae04>] (panic) from [<80241fd0>] (print_tainted+0x0/0xa0 kernel/panic.c:236)
 r3:8260c488 r2:00000001 r1:81f86a00 r0:81f8e410
 r7:8133342c
[<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 r7:00000cc4 r6:82130e50 r5:8260c960 r4:824adf7c
[<802422cc>] (warn_slowpath_fmt) from [<8133342c>] (skb_checksum_help+0x180/0x1d4 net/core/dev.c:3268)
 r10:0000002f r9:00000000 r8:8600e700 r7:00000000 r6:000006a8 r5:827e21aa
 r4:860e3840
[<813332ac>] (skb_checksum_help) from [<814c79c0>] (ip_do_fragment+0x424/0x704 net/ipv4/ip_output.c:775)
 r7:00000000 r6:00000000 r5:84e48000 r4:860e3840
[<814c759c>] (ip_do_fragment) from [<814c7cfc>] (ip_fragment.constprop.0+0x5c/0x104 net/ipv4/ip_output.c:582)
 r10:0000002f r9:00000000 r8:860e3480 r7:000005dc r6:00000000 r5:84e48000
 r4:860e3840
[<814c7ca0>] (ip_fragment.constprop.0) from [<814c7ee8>] (ip_finish_output_gso net/ipv4/ip_output.c:280 [inline])
[<814c7ca0>] (ip_fragment.constprop.0) from [<814c7ee8>] (__ip_finish_output net/ipv4/ip_output.c:302 [inline])
[<814c7ca0>] (ip_fragment.constprop.0) from [<814c7ee8>] (__ip_finish_output+0x144/0x184 net/ipv4/ip_output.c:289)
 r5:84e48000 r4:00000000
[<814c7da4>] (__ip_finish_output) from [<814c7f54>] (ip_finish_output+0x2c/0xcc net/ipv4/ip_output.c:317)
 r9:8600e700 r8:845f7000 r7:84e48000 r6:00000000 r5:860e3300 r4:00000000
[<814c7f28>] (ip_finish_output) from [<814c80cc>] (NF_HOOK_COND include/linux/netfilter.h:292 [inline])
[<814c7f28>] (ip_finish_output) from [<814c80cc>] (ip_output+0xd8/0x170 net/ipv4/ip_output.c:431)
 r7:859f0000 r6:00000000 r5:84e48000 r4:860e3300
[<814c7ff4>] (ip_output) from [<814c91d4>] (dst_output include/net/dst.h:458 [inline])
[<814c7ff4>] (ip_output) from [<814c91d4>] (ip_local_out+0x40/0x44 net/ipv4/ip_output.c:126)
 r8:84e48000 r7:00000000 r6:00000000 r5:84e48000 r4:860e3300
[<814c9194>] (ip_local_out) from [<81530770>] (iptunnel_xmit+0x148/0x268 net/ipv4/ip_tunnel_core.c:82)
 r7:00000000 r6:845f7000 r5:00000000 r4:860e3300
[<81530628>] (iptunnel_xmit) from [<8153aeb8>] (ip_tunnel_xmit+0x800/0xae4 net/ipv4/ip_tunnel.c:831)
 r10:8600e700 r9:00000024 r8:0000000f r7:0000000e r6:00000024 r5:845f7000
 r4:860e3300
[<8153a6b8>] (ip_tunnel_xmit) from [<8154b898>] (__gre_xmit+0x140/0x234 net/ipv4/ip_gre.c:469)
 r10:00000004 r9:00000000 r8:00000008 r7:89d88048 r6:845f7000 r5:860e3300
 r4:00000000
[<8154b758>] (__gre_xmit) from [<8154c2c4>] (ipgre_xmit+0x19c/0x22c net/ipv4/ip_gre.c:661)
 r10:8260ee7c r9:00000000 r8:83283ac0 r7:845f7000 r6:89d88048 r5:845f7000
 r4:860e3300
[<8154c128>] (ipgre_xmit) from [<8133b564>] (__netdev_start_xmit include/linux/netdevice.h:4918 [inline])
[<8154c128>] (ipgre_xmit) from [<8133b564>] (netdev_start_xmit include/linux/netdevice.h:4932 [inline])
[<8154c128>] (ipgre_xmit) from [<8133b564>] (xmit_one net/core/dev.c:3578 [inline])
[<8154c128>] (ipgre_xmit) from [<8133b564>] (dev_hard_start_xmit+0xc0/0x2a4 net/core/dev.c:3594)
 r7:845f7000 r6:00000000 r5:860e3300 r4:81c3e4c4
[<8133b4a4>] (dev_hard_start_xmit) from [<8133c358>] (__dev_queue_xmit+0xaf8/0xdc8 net/core/dev.c:4244)
 r10:00000006 r9:0000061f r8:824b1288 r7:846c6a00 r6:845f7000 r5:eba11c60
 r4:860e3300
[<8133b860>] (__dev_queue_xmit) from [<81634f54>] (dev_queue_xmit include/linux/netdevice.h:3088 [inline])
[<8133b860>] (__dev_queue_xmit) from [<81634f54>] (packet_xmit net/packet/af_packet.c:276 [inline])
[<8133b860>] (__dev_queue_xmit) from [<81634f54>] (packet_xmit+0x9c/0x100 net/packet/af_packet.c:273)
 r10:89d8bf00 r9:85ba2000 r8:860e3300 r7:0000000a r6:845f7000 r5:00003000
 r4:860e3300
[<81634eb8>] (packet_xmit) from [<816386a8>] (packet_snd net/packet/af_packet.c:3081 [inline])
[<81634eb8>] (packet_xmit) from [<816386a8>] (packet_sendmsg+0xec8/0x1448 net/packet/af_packet.c:3113)
 r7:0000000a r6:845f7000 r5:00003000 r4:85ba2000
[<816377e0>] (packet_sendmsg) from [<8130da20>] (sock_sendmsg_nosec net/socket.c:724 [inline])
[<816377e0>] (packet_sendmsg) from [<8130da20>] (sock_sendmsg+0x44/0x78 net/socket.c:747)
 r10:eba11dd4 r9:00000000 r8:00000000 r7:00000000 r6:85295900 r5:eba11f30
 r4:00000000
[<8130d9dc>] (sock_sendmsg) from [<8130e538>] (____sys_sendmsg+0x210/0x2bc net/socket.c:2503)
 r7:00000000 r6:85295900 r5:00000000 r4:eba11f30
[<8130e328>] (____sys_sendmsg) from [<81310168>] (___sys_sendmsg+0x74/0xac net/socket.c:2557)
 r10:00000128 r9:83283ac0 r8:00000000 r7:00000000 r6:85295900 r5:eba11f30
 r4:00000000
[<813100f4>] (___sys_sendmsg) from [<813105bc>] (__sys_sendmsg net/socket.c:2586 [inline])
[<813100f4>] (___sys_sendmsg) from [<813105bc>] (__do_sys_sendmsg net/socket.c:2595 [inline])
[<813100f4>] (___sys_sendmsg) from [<813105bc>] (sys_sendmsg+0x58/0xa0 net/socket.c:2593)
 r8:80200288 r7:00000128 r6:00000000 r5:20002ac0 r4:85295900
[<81310564>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xeba11fa8 to 0xeba11ff0)
1fa0:                   00000000 00000000 00000003 20002ac0 00000000 00000000
1fc0: 00000000 00000000 0014c2b8 00000128 7edf33c2 76bf26d0 7edf3534 76bf220c
1fe0: 76bf2020 76bf2010 00017004 0004dfb0
 r6:0014c2b8 r5:00000000 r4:00000000
Rebooting in 86400 seconds..