device syz0 entered promiscuous mode ------------[ cut here ]------------ syz0: caps=(0x00000800000058c1, 0x0000000000000000) len=392 data_len=0 gso_size=127 gso_type=3 ip_summed=0 WARNING: CPU: 1 PID: 3092 at net/core/dev.c:2600 skb_warn_bad_offload+0x2bd/0x3c0 net/core/dev.c:2595 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3092 Comm: syz-executor0 Not tainted 4.15.0-rc1+ #114 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177 fixup_bug arch/x86/kernel/traps.c:246 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:930 RIP: 0010:skb_warn_bad_offload+0x2bd/0x3c0 net/core/dev.c:2595 RSP: 0018:ffff8801cb89ef60 EFLAGS: 00010286 RAX: dffffc0000000008 RBX: ffff8801cc7f0280 RCX: ffffffff8159c48e RDX: 0000000000000000 RSI: 1ffff10039713da7 RDI: ffff8801cb89ec68 RBP: ffff8801cb89efb8 R08: 1ffff10039713d69 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801cc7f0280 R14: ffff8801cbfb15d8 R15: 0000000000000003 __skb_gso_segment+0x612/0x800 net/core/dev.c:2807 skb_gso_segment include/linux/netdevice.h:3993 [inline] validate_xmit_skb+0x4ba/0xb20 net/core/dev.c:3057 validate_xmit_skb_list+0xb7/0x120 net/core/dev.c:3108 sch_direct_xmit+0x3b6/0x6d0 net/sched/sch_generic.c:181 __dev_xmit_skb net/core/dev.c:3189 [inline] __dev_queue_xmit+0x16f4/0x2070 net/core/dev.c:3456 dev_queue_xmit+0x17/0x20 net/core/dev.c:3521 packet_snd net/packet/af_packet.c:2943 [inline] packet_sendmsg+0x3ab1/0x6060 net/packet/af_packet.c:2968 sock_sendmsg_nosec net/socket.c:632 [inline] sock_sendmsg+0xca/0x110 net/socket.c:642 sock_write_iter+0x320/0x5e0 net/socket.c:911 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:482 vfs_write+0x18f/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 do_syscall_32_irqs_on arch/x86/entry/common.c:327 [inline] do_fast_syscall_32+0x3ee/0xf9d arch/x86/entry/common.c:389 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:125 RIP: 0023:0xf7f95c79 RSP: 002b:00000000ffd5cb1c EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000205c2000 RDX: 0000000000000192 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..