IPVS: Creating netns size=2552 id=1 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3323 at net/core/dev.c:2449 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2444() sit1: caps=(0x00000000001b5869, 0x0000000000000000) len=205 data_len=0 gso_size=55468 gso_type=4 ip_summed=0 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 3323 Comm: syzkaller932647 Not tainted 4.4.107-g610c835 #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 0000000000000000 5e908135d09ce0c8 ffff8801d152f3a8 ffffffff81d0457d ffffffff838429a0 ffff8801d152f480 ffffffff83ca99a0 0000000000000009 0000000000000991 ffff8801d152f470 ffffffff8141774a 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] panic+0x1aa/0x388 kernel/panic.c:112 [] warn_slowpath_common+0x125/0x140 kernel/panic.c:455 [] warn_slowpath_fmt+0xc1/0x110 kernel/panic.c:471 [] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2444 [] __skb_gso_segment+0x3b3/0x4a0 net/core/dev.c:2602 [] skb_gso_segment include/linux/netdevice.h:3705 [inline] [] validate_xmit_skb.isra.100.part.101+0x44e/0x970 net/core/dev.c:2810 [] validate_xmit_skb include/trace/events/net.h:119 [inline] [] __dev_queue_xmit+0x13cf/0x1a70 net/core/dev.c:3181 [] dev_queue_xmit+0x17/0x20 net/core/dev.c:3223 [] packet_snd net/packet/af_packet.c:2828 [inline] [] packet_sendmsg+0x29b2/0x47e0 net/packet/af_packet.c:2853 [] sock_sendmsg_nosec net/socket.c:625 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:635 [] ___sys_sendmsg+0x312/0x7c0 net/socket.c:1962 [] __sys_sendmmsg+0x11c/0x2e0 net/socket.c:2047 [] SYSC_sendmmsg net/socket.c:2077 [inline] [] SyS_sendmmsg+0x35/0x60 net/socket.c:2072 [] entry_SYSCALL_64_fastpath+0x16/0x76 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..