RAX: ffffffffffffffda RBX: 00007fbb9d6a16d4 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000430 R14: 00000000006fa520 R15: 0000000000000031
BUG: unable to handle kernel NULL pointer dereference at 0000000000000088
IP: free_mem_cgroup_per_node_info mm/memcontrol.c:4111 [inline]
IP: __mem_cgroup_free+0x100/0x230 mm/memcontrol.c:4120
PGD 80000001c8324067 P4D 80000001c8324067 PUD 19a8e9067 PMD 0 
Oops: 0000 [#1] SMP PTI
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 10674 Comm: syz-executor7 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:free_mem_cgroup_per_node_info mm/memcontrol.c:4111 [inline]
RIP: 0010:__mem_cgroup_free+0x100/0x230 mm/memcontrol.c:4120
RSP: 0018:ffff88019e7af840 EFLAGS: 00010246
RAX: ffff8801b6360f38 RBX: 0000000000000000 RCX: ffff880000000000
RDX: ffff8801b6358f38 RSI: aaaaaaaaaaaab000 RDI: 0000000000000088
RBP: ffff88019e7af890 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88014db46198 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fbb9d6a1700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001c21ac000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 mem_cgroup_css_alloc+0x1011/0x2160 mm/memcontrol.c:4181
 css_create kernel/cgroup/cgroup.c:4729 [inline]
 cgroup_apply_control_enable+0x599/0x2390 kernel/cgroup/cgroup.c:2916
 cgroup_mkdir+0x215a/0x3120 kernel/cgroup/cgroup.c:4938
 kernfs_iop_mkdir+0x333/0x4c0 fs/kernfs/dir.c:1099
 vfs_mkdir+0x69f/0x950 fs/namei.c:3800
 SYSC_mkdirat+0x3dd/0x6a0 fs/namei.c:3823
 SyS_mkdirat+0x54/0x80 fs/namei.c:3807
 SYSC_mkdir+0x74/0x90 fs/namei.c:3834
 SyS_mkdir+0x45/0x70 fs/namei.c:3832
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455979
RSP: 002b:00007fbb9d6a0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007fbb9d6a16d4 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000430 R14: 00000000006fa520 R15: 0000000000000031
Code: 07 00 00 48 89 4d b8 48 89 c8 4c 09 e0 75 9d 4c 8b 3b 48 89 df e8 51 37 f9 ff 4c 8b 20 8b 1a 49 8d bf 88 00 00 00 4d 85 e4 75 93 <4d> 8b b7 88 00 00 00 e8 34 37 f9 ff 48 8b 00 8b 0a 49 89 45 00 
RIP: free_mem_cgroup_per_node_info mm/memcontrol.c:4111 [inline] RSP: ffff88019e7af840
RIP: __mem_cgroup_free+0x100/0x230 mm/memcontrol.c:4120 RSP: ffff88019e7af840
CR2: 0000000000000088
---[ end trace c53fd4c69f3eb876 ]---