R13: 00000000000003fa R14: 00000000006f9010 R15: 0000000000000020 ------------[ cut here ]------------ refcount_t: increment on 0; use-after-free. WARNING: CPU: 0 PID: 4526 at lib/refcount.c:153 refcount_inc+0x5d/0x70 lib/refcount.c:153 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4526 Comm: syz-executor0 Not tainted 4.16.0+ #1 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+0x1b9/0x29f lib/dump_stack.c:53 panic+0x22f/0x4de kernel/panic.c:183 __warn.cold.8+0x163/0x1a3 kernel/panic.c:547 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1bc/0x470 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991 RIP: 0010:refcount_inc+0x5d/0x70 lib/refcount.c:153 RSP: 0018:ffff8801ca2ff838 EFLAGS: 00010286 RAX: 000000000000002b RBX: 0000000000000000 RCX: ffffffff815f2e0d RDX: 0000000000000000 RSI: ffffffff815f7bf1 RDI: ffff8801ca2ff398 RBP: ffff8801ca2ff840 R08: ffff8801ca2f4000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d02fc000 R13: ffff8801ca2ffac8 R14: 0000000000000040 R15: ffff8801a4e8c040 get_net include/net/net_namespace.h:206 [inline] sk_alloc+0x450/0x17b0 net/core/sock.c:1540 inet_create+0x4f8/0x10a0 net/ipv4/af_inet.c:320 __sock_create+0x526/0x920 net/socket.c:1285 sock_create net/socket.c:1325 [inline] __sys_socket+0x100/0x250 net/socket.c:1355 SYSC_socket net/socket.c:1364 [inline] SyS_socket+0x24/0x30 net/socket.c:1362 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457e07 RSP: 002b:00007ffc2ff846d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00000000000002e5 RCX: 0000000000457e07 RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 000000000004ce72 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 0000000000000741 R13: 0000000000000003 R14: 0000000000000741 R15: 000000000004cca9 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..