------------[ cut here ]------------ WARNING: CPU: 1 PID: 3803 at net/core/dev.c:2466 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2461 syz0: caps=(0x00000400000058c1, 0x0000000000000000) len=90 data_len=0 gso_size=574 gso_type=5 ip_summed=0 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3803 Comm: syzkaller295848 Not tainted 4.9.83-ga92bb8d #51 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d7497378 ffffffff81d95149 ffffffff83a480c0 ffff8801d7497450 ffffffff83ee3100 ffffffff82f3634f 0000000000000009 ffff8801d7497440 ffffffff8142f6c1 0000000041b58ab3 ffffffff8418b1f0 ffffffff8142f505 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bc/0x3a8 kernel/panic.c:179 [] __warn+0x1c4/0x1e0 kernel/panic.c:542 [] warn_slowpath_fmt+0xc4/0x110 kernel/panic.c:565 [] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2461 [] __skb_gso_segment+0x52b/0x670 net/core/dev.c:2767 [] skb_gso_segment include/linux/netdevice.h:4000 [inline] [] validate_xmit_skb+0x44e/0x980 net/core/dev.c:3003 [] validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3052 [] sch_direct_xmit+0x34a/0x5d0 net/sched/sch_generic.c:177 [] __dev_xmit_skb net/core/dev.c:3144 [inline] [] __dev_queue_xmit+0x17b2/0x20a0 net/core/dev.c:3404 [] dev_queue_xmit+0x17/0x20 net/core/dev.c:3469 [] packet_snd net/packet/af_packet.c:2953 [inline] [] packet_sendmsg+0x2ccc/0x4760 net/packet/af_packet.c:2978 [] sock_sendmsg_nosec net/socket.c:635 [inline] [] sock_sendmsg+0xca/0x110 net/socket.c:645 [] SYSC_sendto+0x2c8/0x340 net/socket.c:1670 [] SyS_sendto+0x40/0x50 net/socket.c:1638 [] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline] [] do_fast_syscall_32+0x2f5/0x870 arch/x86/entry/common.c:387 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..