Warning: Permanently added '10.128.0.110' (ECDSA) to the list of known hosts. [ 62.322888][ T3548] cgroup: Unknown subsys name 'net' [ 62.432370][ T3548] cgroup: Unknown subsys name 'rlimit' executing program [ 62.602763][ T3550] [ 62.605129][ T3550] ====================================================== [ 62.612168][ T3550] WARNING: possible circular locking dependency detected [ 62.619217][ T3550] 6.1.28-syzkaller #0 Not tainted [ 62.624331][ T3550] ------------------------------------------------------ [ 62.631352][ T3550] syz-executor139/3550 is trying to acquire lock: [ 62.637761][ T3550] ffffffff8cdc4930 (cpu_hotplug_lock){++++}-{0:0}, at: static_key_slow_inc+0xe/0x20 [ 62.647187][ T3550] [ 62.647187][ T3550] but task is already holding lock: [ 62.654550][ T3550] ffffffff8cf5a648 (freezer_mutex){+.+.}-{3:3}, at: freezer_css_online+0x4b/0x140 [ 62.663791][ T3550] [ 62.663791][ T3550] which lock already depends on the new lock. [ 62.663791][ T3550] [ 62.674207][ T3550] [ 62.674207][ T3550] the existing dependency chain (in reverse order) is: [ 62.683504][ T3550] [ 62.683504][ T3550] -> #1 (freezer_mutex){+.+.}-{3:3}: [ 62.690994][ T3550] lock_acquire+0x1f8/0x5a0 [ 62.696029][ T3550] __mutex_lock_common+0x1d4/0x2520 [ 62.701788][ T3550] mutex_lock_nested+0x17/0x20 [ 62.707097][ T3550] freezer_write+0xa4/0x3f0 [ 62.712130][ T3550] cgroup_file_write+0x2c6/0x690 [ 62.717603][ T3550] kernfs_fop_write_iter+0x3a2/0x4f0 [ 62.723415][ T3550] vfs_write+0x7ae/0xba0 [ 62.730645][ T3550] ksys_write+0x19c/0x2c0 [ 62.735534][ T3550] do_syscall_64+0x3d/0xb0 [ 62.740490][ T3550] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 62.746905][ T3550] [ 62.746905][ T3550] -> #0 (cpu_hotplug_lock){++++}-{0:0}: [ 62.754657][ T3550] validate_chain+0x1667/0x58e0 [ 62.760058][ T3550] __lock_acquire+0x125b/0x1f80 [ 62.765457][ T3550] lock_acquire+0x1f8/0x5a0 [ 62.770491][ T3550] cpus_read_lock+0x3e/0x150 [ 62.775610][ T3550] static_key_slow_inc+0xe/0x20 [ 62.780985][ T3550] freezer_css_online+0xc2/0x140 [ 62.786471][ T3550] online_css+0xba/0x260 [ 62.791250][ T3550] cgroup_apply_control_enable+0x7d1/0xae0 [ 62.797596][ T3550] cgroup_mkdir+0xd8b/0xff0 [ 62.802630][ T3550] kernfs_iop_mkdir+0x275/0x400 [ 62.808293][ T3550] vfs_mkdir+0x3b6/0x590 [ 62.813080][ T3550] do_mkdirat+0x260/0x520 [ 62.818201][ T3550] __x64_sys_mkdirat+0x85/0x90 [ 62.823514][ T3550] do_syscall_64+0x3d/0xb0 [ 62.828455][ T3550] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 62.834872][ T3550] [ 62.834872][ T3550] other info that might help us debug this: [ 62.834872][ T3550] [ 62.845360][ T3550] Possible unsafe locking scenario: [ 62.845360][ T3550] [ 62.853067][ T3550] CPU0 CPU1 [ 62.858444][ T3550] ---- ---- [ 62.863805][ T3550] lock(freezer_mutex); [ 62.868050][ T3550] lock(cpu_hotplug_lock); [ 62.875072][ T3550] lock(freezer_mutex); [ 62.881857][ T3550] lock(cpu_hotplug_lock); [ 62.886448][ T3550] [ 62.886448][ T3550] *** DEADLOCK *** [ 62.886448][ T3550] [ 62.894594][ T3550] 4 locks held by syz-executor139/3550: [ 62.900150][ T3550] #0: ffff888027efa460 (sb_writers#10){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 [ 62.909484][ T3550] #1: ffff8880739ff3f0 (&type->i_mutex_dir_key#7/1){+.+.}-{3:3}, at: filename_create+0x256/0x530 [ 62.920135][ T3550] #2: ffffffff8cf4f6e8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_kn_lock_live+0xe5/0x290 [ 62.929903][ T3550] #3: ffffffff8cf5a648 (freezer_mutex){+.+.}-{3:3}, at: freezer_css_online+0x4b/0x140 [ 62.939594][ T3550] [ 62.939594][ T3550] stack backtrace: [ 62.945498][ T3550] CPU: 0 PID: 3550 Comm: syz-executor139 Not tainted 6.1.28-syzkaller #0 [ 62.954013][ T3550] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 [ 62.964607][ T3550] Call Trace: [ 62.967883][ T3550] [ 62.970811][ T3550] dump_stack_lvl+0x1e3/0x2cb [ 62.975495][ T3550] ? nf_tcp_handle_invalid+0x642/0x642 [ 62.980961][ T3550] ? print_circular_bug+0x12b/0x1a0 [ 62.986186][ T3550] check_noncircular+0x2fa/0x3b0 [ 62.991146][ T3550] ? add_chain_block+0x850/0x850 [ 62.996102][ T3550] ? lockdep_lock+0x11f/0x2a0 [ 63.000798][ T3550] ? reacquire_held_locks+0x660/0x660 [ 63.006177][ T3550] ? rcu_lock_release+0x5/0x20 [ 63.010952][ T3550] ? _find_first_zero_bit+0xd0/0x100 [ 63.016247][ T3550] validate_chain+0x1667/0x58e0 [ 63.021125][ T3550] ? reacquire_held_locks+0x660/0x660 [ 63.026503][ T3550] ? __lock_acquire+0x125b/0x1f80 [ 63.031573][ T3550] ? mark_lock+0x9a/0x340 [ 63.035906][ T3550] __lock_acquire+0x125b/0x1f80 [ 63.040767][ T3550] lock_acquire+0x1f8/0x5a0 [ 63.045284][ T3550] ? static_key_slow_inc+0xe/0x20 [ 63.050327][ T3550] ? read_lock_is_recursive+0x10/0x10 [ 63.055720][ T3550] ? __might_sleep+0xb0/0xb0 [ 63.060313][ T3550] ? lockdep_hardirqs_on+0x94/0x130 [ 63.065538][ T3550] ? __local_bh_enable_ip+0x164/0x1f0 [ 63.070924][ T3550] cpus_read_lock+0x3e/0x150 [ 63.075550][ T3550] ? static_key_slow_inc+0xe/0x20 [ 63.080596][ T3550] static_key_slow_inc+0xe/0x20 [ 63.086155][ T3550] freezer_css_online+0xc2/0x140 [ 63.091229][ T3550] online_css+0xba/0x260 [ 63.095497][ T3550] cgroup_apply_control_enable+0x7d1/0xae0 [ 63.101331][ T3550] cgroup_mkdir+0xd8b/0xff0 [ 63.105850][ T3550] ? css_task_iter_end+0x2b0/0x2b0 [ 63.110993][ T3550] ? generic_permission+0x21c/0x4f0 [ 63.116218][ T3550] ? css_task_iter_end+0x2b0/0x2b0 [ 63.121353][ T3550] kernfs_iop_mkdir+0x275/0x400 [ 63.126218][ T3550] vfs_mkdir+0x3b6/0x590 [ 63.130474][ T3550] do_mkdirat+0x260/0x520 [ 63.134812][ T3550] ? vfs_mkdir+0x590/0x590 [ 63.139249][ T3550] ? getname_flags+0x1ec/0x4e0 [ 63.144021][ T3550] __x64_sys_mkdirat+0x85/0x90 [ 63.148897][ T3550] do_syscall_64+0x3d/0xb0 [ 63.153328][ T3550] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 63.159225][ T3550] RIP: 0033:0x7f43ee774e19 [ 63.163637][ T3550] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 15 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 63.183331][ T3550] RSP: 002b:00007ffda6be7dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 [ 63.191749][ T3550] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f43ee774e19 executing program executing program executing program executing program executing program executing program executing program [ 63.199749][ T3550] RDX: 00000000000001ff RSI: 0000000020000180 RDI: 0000000000000003 [ 63.207719][ T3550] RBP: 0000000000000000 R08: 00007ffda6be7df0 R09: 00007ffda6be7df0 [ 63.215707][ T3550] R10: 00007ffda6be7df0 R11: 0000000000000246 R12: 00007ffda6be7dec [ 63.223780][ T3550] R13: 00007ffda6be7e00 R14: 00007ffda6be7e40 R15: 0000000000000000 [ 63.231790][ T3550] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program