kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN device gre0 entered promiscuous mode Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 4690 Comm: syz-executor3 Not tainted 4.9.56-g5c73594 #66 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801cf1ac800 task.stack: ffff8801d85b0000 RIP: 0010:[] [] ip6_setup_cork+0x20c/0x1200 net/ipv6/ip6_output.c:1230 RSP: 0018:ffff8801d85b76d8 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: ffff8801d85b78b8 RCX: ffffc900009a3000 RDX: 0000000000000002 RSI: 00000000024080c0 RDI: 0000000000000014 RBP: ffff8801d85b7740 R08: ffff8801a97bfdc0 R09: ffff8801d85b7b70 R10: 0000000000000000 R11: 1ffff1003b0b6efa R12: ffff8801d85b7ad0 R13: ffff8801d85b7b70 R14: 0000000000000000 R15: 0000000000000010 FS: 00007f42fc863700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 00000001cca29000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801d85b7860 ffffffff833bff90 ffff8801ca31c9c8 ffff8801ca31ccc0 ffff8801ca31c780 ffff8801d85b7a90 ffff8801a97bfdc0 ffff8801d85b77f8 ffff8801d85b7958 ffff8801d85b7a90 ffff8801d85b7838 ffff8801ca31c780 Call Trace: [] ip6_make_skb+0x1b8/0x440 net/ipv6/ip6_output.c:1802 [] udpv6_sendmsg+0x1b1d/0x2540 net/ipv6/udp.c:1240 [] inet_sendmsg+0x2bc/0x4c0 net/ipv4/af_inet.c:753 [] 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 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Code: e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 5d 0d 00 00 49 8d 7f 04 45 8b 74 24 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RIP [] ip6_setup_cork+0x20c/0x1200 net/ipv6/ip6_output.c:1230 RSP ---[ end trace d77d6b577033b8db ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..