RBP: 000000000072bea0 R08: 0000000020000080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00000000000003fa R14: 00000000006f8010 R15: 0000000000000022
------------[ cut here ]------------
refcount_t: increment on 0; use-after-free.
WARNING: CPU: 0 PID: 4487 at lib/refcount.c:153 refcount_inc+0x47/0x50 lib/refcount.c:153
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4487 Comm: syz-executor5 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
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
 __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:ffff8801ceb77860 EFLAGS: 00010286
RAX: dffffc0000000008 RBX: ffff8801ad868084 RCX: ffffffff815b423e
RDX: 0000000000000000 RSI: 1ffff10039d6eebc RDI: 1ffff10039d6ee91
RBP: ffff8801ceb77868 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801ceb77af8
R13: ffff8801d8c04a93 R14: ffff8801ad868080 R15: ffff8801d8c04b01
 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: 0033:0x457d97
RSP: 002b:00007ffe72bdb618 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457d97
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 000000000000a56f R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000202 R12: 0000000000000005
R13: 0000000000000012 R14: 0000000000000005 R15: 0000000000009f24
CPU: 1 PID: 4616 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
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x8c0/0xa40 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc mm/slab.c:3365 [inline]
 __do_kmalloc mm/slab.c:3703 [inline]
 __kmalloc+0x63/0x760 mm/slab.c:3714
 kmalloc include/linux/slab.h:517 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 register_shrinker+0x10e/0x2d0 mm/vmscan.c:268
 sget_userns+0xbbf/0xe40 fs/super.c:520
 mount_ns+0x6d/0x190 fs/super.c:1029
 rpc_mount+0x9e/0xd0 net/sunrpc/rpc_pipe.c:1451
 mount_fs+0x66/0x2d0 fs/super.c:1222
 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:2509 [inline]
 do_new_mount fs/namespace.c:2512 [inline]
 do_mount+0xea4/0x2bb0 fs/namespace.c:2842
 SYSC_mount fs/namespace.c:3058 [inline]
 SyS_mount+0xab/0x120 fs/namespace.c:3035
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455269
RSP: 002b:00007ffc5fd39708 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000020df914 RCX: 0000000000455269
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000020000000
RBP: 000000000072bea0 R08: 0000000020000080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00000000000003fa R14: 00000000006f8010 R15: 0000000000000022
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..