------------[ cut here ]------------ refcount_t: increment on 0; use-after-free. WARNING: CPU: 0 PID: 11547 at lib/refcount.c:153 refcount_inc+0x47/0x50 lib/refcount.c:153 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 11547 Comm: syz-executor1 Not tainted 4.16.0-rc6+ #43 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+0x194/0x24d lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x1f4/0x2b0 lib/bug.c:186 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 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:986 RIP: 0010:refcount_inc+0x47/0x50 lib/refcount.c:153 RSP: 0018:ffff8801d1167860 EFLAGS: 00010286 RAX: dffffc0000000008 RBX: ffff8801af1bc0c4 RCX: ffffffff815b423e RDX: 0000000000000000 RSI: 1ffff1003a22cebc RDI: 1ffff1003a22ce91 RBP: ffff8801d1167868 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d1167af8 R13: ffff8801b07f6a93 R14: ffff8801af1bc0c0 R15: ffff8801b07f6b01 get_net include/net/net_namespace.h:204 [inline] sk_alloc+0x3f9/0x1440 net/core/sock.c:1540 inet_create+0x47c/0xf50 net/ipv4/af_inet.c:320 __sock_create+0x4d4/0x850 net/socket.c:1285 sock_create net/socket.c:1325 [inline] SYSC_socket net/socket.c:1355 [inline] SyS_socket+0xeb/0x1d0 net/socket.c:1335 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4579a7 RSP: 002b:00007ffec19fca98 EFLAGS: 00000206 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00000000000001c2 RCX: 00000000004579a7 RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 00000000000d292e R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000000a R11: 0000000000000206 R12: 000000000000038d R13: 000000000000001a R14: 000000000000038d R15: 00000000000d2781 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..