------------[ cut here ]------------
WARNING: CPU: 1 PID: 7413 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: 7413 Comm: syz-executor.1 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
 r7:813333e8
[<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 r6:82130e50 r5:8260c960 r4:824adf7c
[<802422cc>] (warn_slowpath_fmt) from [<813333e8>] (skb_checksum_help+0x13c/0x1d4 net/core/dev.c:3261)
 r10:0000002f r9:00000000 r8:849fce80 r7:00000000 r6:00000688 r5:827e21aa
 r4:84c46b40
[<813332ac>] (skb_checksum_help) from [<814c79c0>] (ip_do_fragment+0x424/0x704 net/ipv4/ip_output.c:775)
 r7:00000000 r6:00000000 r5:84ef8000 r4:84c46b40
[<814c759c>] (ip_do_fragment) from [<814c7cfc>] (ip_fragment.constprop.0+0x5c/0x104 net/ipv4/ip_output.c:582)
 r10:0000002f r9:00000000 r8:84c469c0 r7:000005dc r6:00000000 r5:84ef8000
 r4:84c46b40
[<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)
 r5:84ef8000 r4:00000000
[<814c7da4>] (__ip_finish_output) from [<814c7f54>] (ip_finish_output+0x2c/0xcc net/ipv4/ip_output.c:317)
 r9:849fce80 r8:84dc7000 r7:84ef8000 r6:00000001 r5:84c46180 r4:00000000
[<814c7f28>] (ip_finish_output) from [<814c9928>] (NF_HOOK_COND include/linux/netfilter.h:292 [inline])
[<814c7f28>] (ip_finish_output) from [<814c9928>] (ip_mc_output+0xe8/0x304 net/ipv4/ip_output.c:416)
 r7:00000000 r6:00000001 r5:84ef8000 r4:84c46180
[<814c9840>] (ip_mc_output) from [<814c91d4>] (dst_output include/net/dst.h:458 [inline])
[<814c9840>] (ip_mc_output) from [<814c91d4>] (ip_local_out+0x40/0x44 net/ipv4/ip_output.c:126)
 r9:849fce80 r8:84ef8000 r7:00000000 r6:00000000 r5:84ef8000 r4:84c46180
[<814c9194>] (ip_local_out) from [<81530770>] (iptunnel_xmit+0x148/0x268 net/ipv4/ip_tunnel_core.c:82)
 r7:00000000 r6:85812800 r5:00000000 r4:84c46180
[<81530628>] (iptunnel_xmit) from [<8153aeb8>] (ip_tunnel_xmit+0x800/0xae4 net/ipv4/ip_tunnel.c:831)
 r10:849fce80 r9:00000024 r8:0000000f r7:00000002 r6:00000024 r5:85812800
 r4:84c46180
[<8153a6b8>] (ip_tunnel_xmit) from [<8154b898>] (__gre_xmit+0x140/0x234 net/ipv4/ip_gre.c:469)
 r10:00000004 r9:00000000 r8:00000008 r7:860c8048 r6:85812800 r5:84c46180
 r4:00000000
[<8154b758>] (__gre_xmit) from [<8154c2c4>] (ipgre_xmit+0x19c/0x22c net/ipv4/ip_gre.c:661)
 r10:8260ee7c r9:00000000 r8:86020000 r7:85812800 r6:860c8048 r5:85812800
 r4:84c46180
[<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)
 r7:85812800 r6:00000000 r5:84c46180 r4:81c3e4c4
[<8133b4a4>] (dev_hard_start_xmit) from [<8133c358>] (__dev_queue_xmit+0xaf8/0xdc8 net/core/dev.c:4244)
 r10:00000006 r9:00000688 r8:824b1288 r7:84539e00 r6:85812800 r5:dfa55c60
 r4:84c46180
[<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)
 r10:860cbf00 r9:86075800 r8:84c46180 r7:0000000a r6:85812800 r5:00003000
 r4:84c46180
[<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 r6:85812800 r5:00003000 r4:86075800
[<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:dfa55dd4 r9:00000000 r8:00000000 r7:00000000 r6:851e6780 r5:dfa55f30
 r4:00000000
[<8130d9dc>] (sock_sendmsg) from [<8130e538>] (____sys_sendmsg+0x210/0x2bc net/socket.c:2503)
 r7:00000000 r6:851e6780 r5:00000000 r4:dfa55f30
[<8130e328>] (____sys_sendmsg) from [<81310168>] (___sys_sendmsg+0x74/0xac net/socket.c:2557)
 r10:00000128 r9:86020000 r8:00000000 r7:00000000 r6:851e6780 r5:dfa55f30
 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 r4:851e6780
[<81310564>] (sys_sendmsg) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xdfa55fa8 to 0xdfa55ff0)
5fa0:                   00000000 00000000 00000003 20002ac0 00000000 00000000
5fc0: 00000000 00000000 0014c2b8 00000128 7eb553c2 76ba76d0 7eb55534 76ba720c
5fe0: 76ba7020 76ba7010 00017004 0004dfb0
 r6:0014c2b8 r5:00000000 r4:00000000
Rebooting in 86400 seconds..