======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc5-syzkaller-00736-ge839a756012b #0 Not tainted
------------------------------------------------------
syz-executor.0/3703 is trying to acquire lock:
ffffffff8be33ab0 (cpu_hotplug_lock){++++}-{0:0}, at: __static_key_slow_dec kernel/jump_label.c:254 [inline]
ffffffff8be33ab0 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_slow_dec+0x4f/0xc0 kernel/jump_label.c:270

but task is already holding lock:
ffff88802166d8e8 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
ffff88802166d8e8 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x155/0x270 mm/util.c:550

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&mm->mmap_lock#2){++++}-{3:3}:
       down_write+0x90/0x150 kernel/locking/rwsem.c:1552
       mmap_write_lock include/linux/mmap_lock.h:71 [inline]
       mpol_rebind_mm+0x3b/0x310 mm/mempolicy.c:385
       cpuset_attach+0x2e1/0x520 kernel/cgroup/cpuset.c:2321
       cgroup_migrate_execute+0xbc7/0x1220 kernel/cgroup/cgroup.c:2584
       cgroup_attach_task+0x416/0x7c0 kernel/cgroup/cgroup.c:2875
       __cgroup1_procs_write.constprop.0+0x3be/0x4b0 kernel/cgroup/cgroup-v1.c:525
       cgroup_file_write+0x1de/0x770 kernel/cgroup/cgroup.c:3962
       kernfs_fop_write_iter+0x3f8/0x610 fs/kernfs/file.c:354
       call_write_iter include/linux/fs.h:2187 [inline]
       new_sync_write fs/read_write.c:491 [inline]
       vfs_write+0x9e9/0xdd0 fs/read_write.c:578
       ksys_write+0x127/0x250 fs/read_write.c:631
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #1 (&cpuset_rwsem){++++}-{0:0}:
       percpu_down_write+0x4d/0x440 kernel/locking/percpu-rwsem.c:221
       cpuset_css_online+0x61/0x900 kernel/cgroup/cpuset.c:2856
       online_css+0xaf/0x2a0 kernel/cgroup/cgroup.c:5334
       css_create kernel/cgroup/cgroup.c:5405 [inline]
       cgroup_apply_control_enable+0x69b/0xc00 kernel/cgroup/cgroup.c:3204
       cgroup_mkdir+0x5ba/0x12f0 kernel/cgroup/cgroup.c:5602
       kernfs_iop_mkdir+0x146/0x1d0 fs/kernfs/dir.c:1185
       vfs_mkdir+0x489/0x740 fs/namei.c:4013
       do_mkdirat+0x28c/0x310 fs/namei.c:4038
       __do_sys_mkdir fs/namei.c:4058 [inline]
       __se_sys_mkdir fs/namei.c:4056 [inline]
       __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4056
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #0 (cpu_hotplug_lock){++++}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3095 [inline]
       check_prevs_add kernel/locking/lockdep.c:3214 [inline]
       validate_chain kernel/locking/lockdep.c:3829 [inline]
       __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5053
       lock_acquire kernel/locking/lockdep.c:5666 [inline]
       lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       cpus_read_lock+0x3e/0x140 kernel/cpu.c:310
       __static_key_slow_dec kernel/jump_label.c:254 [inline]
       static_key_slow_dec+0x4f/0xc0 kernel/jump_label.c:270
       sw_perf_event_destroy+0xa5/0x240 kernel/events/core.c:9615
       _free_event+0x2ee/0x1390 kernel/events/core.c:4965
       put_event kernel/events/core.c:5059 [inline]
       perf_mmap_close+0x540/0xe30 kernel/events/core.c:6120
       remove_vma+0xac/0x170 mm/mmap.c:143
       remove_vma_list mm/mmap.c:2601 [inline]
       __do_munmap+0x7a6/0x10b0 mm/mmap.c:2839
       do_munmap mm/mmap.c:2847 [inline]
       munmap_vma_range mm/mmap.c:562 [inline]
       mmap_region+0x1d8/0x1460 mm/mmap.c:1707
       do_mmap+0x863/0xfa0 mm/mmap.c:1540
       vm_mmap_pgoff+0x1ab/0x270 mm/util.c:552
       ksys_mmap_pgoff+0x41b/0x5a0 mm/mmap.c:1586
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

other info that might help us debug this:

Chain exists of:
  cpu_hotplug_lock --> &cpuset_rwsem --> &mm->mmap_lock#2

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&mm->mmap_lock#2);
                               lock(&cpuset_rwsem);
                               lock(&mm->mmap_lock#2);
  lock(cpu_hotplug_lock);

 *** DEADLOCK ***

1 lock held by syz-executor.0/3703:
 #0: ffff88802166d8e8 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #0: ffff88802166d8e8 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x155/0x270 mm/util.c:550

stack backtrace:
CPU: 0 PID: 3703 Comm: syz-executor.0 Not tainted 6.0.0-rc5-syzkaller-00736-ge839a756012b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3095 [inline]
 check_prevs_add kernel/locking/lockdep.c:3214 [inline]
 validate_chain kernel/locking/lockdep.c:3829 [inline]
 __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5053
 lock_acquire kernel/locking/lockdep.c:5666 [inline]
 lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 cpus_read_lock+0x3e/0x140 kernel/cpu.c:310
 __static_key_slow_dec kernel/jump_label.c:254 [inline]
 static_key_slow_dec+0x4f/0xc0 kernel/jump_label.c:270
 sw_perf_event_destroy+0xa5/0x240 kernel/events/core.c:9615
 _free_event+0x2ee/0x1390 kernel/events/core.c:4965
 put_event kernel/events/core.c:5059 [inline]
 perf_mmap_close+0x540/0xe30 kernel/events/core.c:6120
 remove_vma+0xac/0x170 mm/mmap.c:143
 remove_vma_list mm/mmap.c:2601 [inline]
 __do_munmap+0x7a6/0x10b0 mm/mmap.c:2839
 do_munmap mm/mmap.c:2847 [inline]
 munmap_vma_range mm/mmap.c:562 [inline]
 mmap_region+0x1d8/0x1460 mm/mmap.c:1707
 do_mmap+0x863/0xfa0 mm/mmap.c:1540
 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:552
 ksys_mmap_pgoff+0x41b/0x5a0 mm/mmap.c:1586
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x463fe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9e4fd47198 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000737 RCX: 0000000000463fe9
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000
RBP: 0000000000000009 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 000000000053c040
R13: 00007f9e4fd476bc R14: 00000000ffffffff R15: 0000000000000006
 </TASK>