kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5445 Comm: syz-executor6 Not tainted 4.15.0-rc8+ #263
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:css_put include/linux/cgroup.h:386 [inline]
RIP: 0010:cgroup_put include/linux/cgroup.h:415 [inline]
RIP: 0010:cgroup_fd_array_put_ptr+0x71/0x2a0 kernel/bpf/arraymap.c:573
RSP: 0018:ffff8801bd8b77d0 EFLAGS: 00010a02
RAX: 123c0041200002b6 RBX: 1ffff10037b16efa RCX: ffffffff8180f4d5
RDX: 0000000000000182 RSI: ffffc900048c9000 RDI: 91e00209000015b1
RBP: ffff8801bd8b7858 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 91e0020900001545
R13: ffff8801bd8b7830 R14: dffffc0000000000 R15: 91e0020900001545
FS:  00007f6721c62700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b9bc23000 CR3: 00000001be135006 CR4: 00000000001606f0
Call Trace:
 fd_array_map_delete_elem kernel/bpf/arraymap.c:420 [inline]
 bpf_fd_array_map_clear kernel/bpf/arraymap.c:461 [inline]
 cgroup_fd_array_free+0xd2/0x150 kernel/bpf/arraymap.c:578
 map_create kernel/bpf/syscall.c:447 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1708 [inline]
 SyS_bpf+0x910/0x4400 kernel/bpf/syscall.c:1685
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452df9
RSP: 002b:00007f6721c61c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452df9
RDX: 000000000000002c RSI: 0000000020000000 RDI: 0000000000000000
RBP: 00000000000003bb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3a28
R13: 00000000ffffffff R14: 00007f6721c626d4 R15: 0000000000000000
Code: 45 88 70 f4 80 81 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 eb 22 ef ff 49 8d 7c 24 6c 48 89 f8 48 c1 e8 03 <42> 0f b6 14 30 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 
RIP: css_put include/linux/cgroup.h:386 [inline] RSP: ffff8801bd8b77d0
RIP: cgroup_put include/linux/cgroup.h:415 [inline] RSP: ffff8801bd8b77d0
RIP: cgroup_fd_array_put_ptr+0x71/0x2a0 kernel/bpf/arraymap.c:573 RSP: ffff8801bd8b77d0
---[ end trace 4c17531fa49eb744 ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..