INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 30774 Comm: syz-executor.5 Not tainted 5.2.0-rc3-next-20190604 #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 assign_lock_key kernel/locking/lockdep.c:776 [inline]
 register_lock_class+0x176c/0x1820 kernel/locking/lockdep.c:1085
 __lock_acquire+0x116/0x5490 kernel/locking/lockdep.c:3671
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4300
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:338 [inline]
 task_lock include/linux/sched/task.h:148 [inline]
 cpuset_change_task_nodemask+0x2b/0x290 kernel/cgroup/cpuset.c:1599
 update_tasks_nodemask+0xf6/0x210 kernel/cgroup/cpuset.c:1649
 update_nodemasks_hier kernel/cgroup/cpuset.c:1722 [inline]
 update_nodemask kernel/cgroup/cpuset.c:1790 [inline]
 cpuset_write_resmask+0x7b3/0x2030 kernel/cgroup/cpuset.c:2353
 cgroup_file_write+0x241/0x790 kernel/cgroup/cgroup.c:3711
 kernfs_fop_write+0x2b8/0x480 fs/kernfs/file.c:316
 __vfs_write+0x8a/0x110 fs/read_write.c:494
 vfs_write+0x268/0x5d0 fs/read_write.c:558
 ksys_write+0x14f/0x290 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:620
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459279
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007efd8250bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459279
RDX: 00000000000001e4 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efd8250c6d4
R13: 00000000004c8ed3 R14: 00000000004dfb98 R15: 00000000ffffffff