Warning: Permanently added '10.128.0.48' (ECDSA) to the list of known hosts. [ 101.398057][ T27] audit: type=1400 audit(1584079391.658:42): avc: denied { map } for pid=10054 comm="syz-executor754" path="/root/syz-executor754343443" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 101.499052][T10055] IPVS: ftp: loaded support on port[0] = 21 [ 101.528855][ T27] audit: type=1400 audit(1584079391.798:43): avc: denied { associate } for pid=10055 comm="syz-executor754" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 executing program [ 101.610355][ T27] audit: type=1400 audit(1584079391.878:44): avc: denied { open } for pid=10056 comm="syz-executor754" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=perf_event permissive=1 [ 101.634205][ T27] audit: type=1400 audit(1584079391.878:45): avc: denied { kernel } for pid=10056 comm="syz-executor754" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=perf_event permissive=1 [ 101.658590][ T27] audit: type=1400 audit(1584079391.878:46): avc: denied { confidentiality } for pid=10056 comm="syz-executor754" lockdown_reason="unsafe use of perf" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=lockdown permissive=1 [ 101.862166][ T27] audit: type=1400 audit(1584079392.128:47): avc: denied { read } for pid=10056 comm="syz-executor754" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=perf_event permissive=1 [ 101.886034][ T27] audit: type=1400 audit(1584079392.128:48): avc: denied { write } for pid=10056 comm="syz-executor754" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=perf_event permissive=1 executing program executing program executing program [ 102.325883][ C0] hrtimer: interrupt took 27163 ns [ 102.501302][T10070] [ 102.503677][T10070] ====================================================== [ 102.510671][T10070] WARNING: possible circular locking dependency detected [ 102.517669][T10070] 5.6.0-rc5-syzkaller #0 Not tainted [ 102.522925][T10070] ------------------------------------------------------ [ 102.529917][T10070] syz-executor754/10070 is trying to acquire lock: [ 102.536499][T10070] ffffffff89768e70 (cpu_hotplug_lock.rw_sem){++++}, at: static_key_slow_dec+0x4f/0x90 [ 102.546030][T10070] [ 102.546030][T10070] but task is already holding lock: [ 102.553643][T10070] ffff88809011c7d8 (&mm->mmap_sem#2){++++}, at: vm_mmap_pgoff+0x152/0x200 [ 102.562237][T10070] [ 102.562237][T10070] which lock already depends on the new lock. [ 102.562237][T10070] [ 102.572616][T10070] [ 102.572616][T10070] the existing dependency chain (in reverse order) is: [ 102.581605][T10070] [ 102.581605][T10070] -> #2 (&mm->mmap_sem#2){++++}: [ 102.588710][T10070] down_write+0x8d/0x150 [ 102.593450][T10070] mpol_rebind_mm+0x20/0xc0 [ 102.598452][T10070] cpuset_attach+0x214/0x400 [ 102.603537][T10070] cgroup_migrate_execute+0xc34/0x1210 [ 102.609489][T10070] cgroup_attach_task+0x57c/0x8e0 [ 102.615071][T10070] __cgroup1_procs_write.constprop.0+0x3a7/0x490 [ 102.621897][T10070] cgroup_file_write+0x20d/0x710 [ 102.627332][T10070] kernfs_fop_write+0x268/0x490 [ 102.632684][T10070] __vfs_write+0x76/0x100 [ 102.637517][T10070] vfs_write+0x262/0x5c0 [ 102.642254][T10070] ksys_write+0x127/0x250 [ 102.647086][T10070] do_syscall_64+0xf6/0x7d0 [ 102.652084][T10070] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.658466][T10070] [ 102.658466][T10070] -> #1 (&cpuset_rwsem){++++}: [ 102.665381][T10070] cpuset_read_lock+0x3b/0x130 [ 102.670645][T10070] __sched_setscheduler.constprop.0+0x251/0x2000 [ 102.677473][T10070] _sched_setscheduler+0xee/0x180 [ 102.683004][T10070] __kthread_create_on_node+0x2ea/0x410 [ 102.689045][T10070] kthread_create_on_node+0xbb/0xf0 [ 102.694765][T10070] create_worker+0x23b/0x530 [ 102.699888][T10070] workqueue_prepare_cpu+0x9c/0xf0 [ 102.705507][T10070] cpuhp_invoke_callback+0x22c/0x1d20 [ 102.711374][T10070] _cpu_up+0x27d/0x540 [ 102.715937][T10070] do_cpu_up+0xfe/0x1a0 [ 102.720589][T10070] smp_init+0x239/0x24e [ 102.725275][T10070] kernel_init_freeable+0x32e/0x5ae [ 102.730968][T10070] kernel_init+0xd/0x1bb [ 102.735704][T10070] ret_from_fork+0x24/0x30 [ 102.740629][T10070] [ 102.740629][T10070] -> #0 (cpu_hotplug_lock.rw_sem){++++}: [ 102.748426][T10070] __lock_acquire+0x201b/0x3ca0 [ 102.753768][T10070] lock_acquire+0x197/0x420 [ 102.758768][T10070] cpus_read_lock+0x3b/0x130 [ 102.763900][T10070] static_key_slow_dec+0x4f/0x90 [ 102.769383][T10070] sw_perf_event_destroy+0x81/0x130 [ 102.775085][T10070] _free_event+0x33b/0x12b0 [ 102.780090][T10070] put_event+0x40/0x50 [ 102.784662][T10070] perf_mmap_close+0x4f7/0xcb0 [ 102.789990][T10070] remove_vma+0xa9/0x170 [ 102.794732][T10070] __do_munmap+0x729/0x10e0 [ 102.799733][T10070] mmap_region+0x1ef/0x1540 [ 102.804728][T10070] do_mmap+0x843/0x1140 [ 102.809385][T10070] vm_mmap_pgoff+0x197/0x200 [ 102.814486][T10070] ksys_mmap_pgoff+0x457/0x5b0 [ 102.819749][T10070] do_syscall_64+0xf6/0x7d0 [ 102.824752][T10070] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.831134][T10070] [ 102.831134][T10070] other info that might help us debug this: [ 102.831134][T10070] [ 102.841336][T10070] Chain exists of: [ 102.841336][T10070] cpu_hotplug_lock.rw_sem --> &cpuset_rwsem --> &mm->mmap_sem#2 [ 102.841336][T10070] [ 102.854854][T10070] Possible unsafe locking scenario: [ 102.854854][T10070] [ 102.862288][T10070] CPU0 CPU1 [ 102.867686][T10070] ---- ---- [ 102.873031][T10070] lock(&mm->mmap_sem#2); [ 102.877424][T10070] lock(&cpuset_rwsem); [ 102.884159][T10070] lock(&mm->mmap_sem#2); [ 102.891067][T10070] lock(cpu_hotplug_lock.rw_sem); [ 102.896248][T10070] [ 102.896248][T10070] *** DEADLOCK *** [ 102.896248][T10070] [ 102.904370][T10070] 1 lock held by syz-executor754/10070: [ 102.909884][T10070] #0: ffff88809011c7d8 (&mm->mmap_sem#2){++++}, at: vm_mmap_pgoff+0x152/0x200 [ 102.918803][T10070] [ 102.918803][T10070] stack backtrace: [ 102.924678][T10070] CPU: 1 PID: 10070 Comm: syz-executor754 Not tainted 5.6.0-rc5-syzkaller #0 [ 102.933422][T10070] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.943464][T10070] Call Trace: [ 102.946739][T10070] dump_stack+0x188/0x20d [ 102.951068][T10070] check_noncircular+0x32e/0x3e0 [ 102.955984][T10070] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 102.961830][T10070] ? print_circular_bug.isra.0+0x220/0x220 [ 102.967695][T10070] ? security_perf_event_free+0x3b/0x80 [ 102.973225][T10070] ? alloc_list_entry+0xb0/0xb0 [ 102.978057][T10070] ? mark_lock+0xbc/0x1220 [ 102.982496][T10070] ? mmap_region+0x1ef/0x1540 [ 102.987157][T10070] ? find_first_zero_bit+0x94/0xb0 [ 102.992255][T10070] __lock_acquire+0x201b/0x3ca0 [ 102.997104][T10070] ? mark_held_locks+0xe0/0xe0 [ 103.001849][T10070] lock_acquire+0x197/0x420 [ 103.006334][T10070] ? static_key_slow_dec+0x4f/0x90 [ 103.011439][T10070] cpus_read_lock+0x3b/0x130 [ 103.016008][T10070] ? static_key_slow_dec+0x4f/0x90 [ 103.021093][T10070] static_key_slow_dec+0x4f/0x90 [ 103.026005][T10070] sw_perf_event_destroy+0x81/0x130 [ 103.031230][T10070] ? swevent_hlist_put_cpu+0x1c0/0x1c0 [ 103.036691][T10070] _free_event+0x33b/0x12b0 [ 103.041245][T10070] ? ring_buffer_attach+0x630/0x630 [ 103.046425][T10070] ? wait_for_completion+0x3c0/0x3c0 [ 103.051694][T10070] ? ring_buffer_attach+0x2d5/0x630 [ 103.056876][T10070] put_event+0x40/0x50 [ 103.060920][T10070] perf_mmap_close+0x4f7/0xcb0 [ 103.065715][T10070] ? init_admin_reserve+0xb0/0xb0 [ 103.070716][T10070] ? perf_compat_ioctl+0x90/0x90 [ 103.075634][T10070] ? perf_compat_ioctl+0x90/0x90 [ 103.080546][T10070] remove_vma+0xa9/0x170 [ 103.084763][T10070] __do_munmap+0x729/0x10e0 [ 103.089246][T10070] mmap_region+0x1ef/0x1540 [ 103.093744][T10070] ? __x64_sys_brk+0x6e0/0x6e0 [ 103.098484][T10070] ? security_mmap_addr+0x81/0xa0 [ 103.103483][T10070] ? get_unmapped_area+0x2a0/0x3c0 [ 103.108571][T10070] do_mmap+0x843/0x1140 [ 103.112703][T10070] vm_mmap_pgoff+0x197/0x200 [ 103.117273][T10070] ? randomize_stack_top+0x100/0x100 [ 103.122534][T10070] ? ksys_dup3+0x3c0/0x3c0 [ 103.126926][T10070] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 103.132457][T10070] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 103.138439][T10070] ksys_mmap_pgoff+0x457/0x5b0 [ 103.143187][T10070] ? find_mergeable_anon_vma+0x2c0/0x2c0 [ 103.148853][T10070] ? fpregs_mark_activate+0x320/0x320 [ 103.154202][T10070] ? trace_hardirqs_off_caller+0x55/0x230 [ 103.159905][T10070] do_syscall_64+0xf6/0x7d0 [ 103.164427][T10070] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.170298][T10070] RIP: 0033:0x4472e9 [ 103.174210][T10070] Code: e8 2c bb 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 103.193799][T10070] RSP: 002b:00007f8789a02da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 executing program [ 103.202223][T10070] RAX: ffffffffffffffda RBX: 00000000006dcc38 RCX: 00000000004472e9 [ 103.210174][T10070] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 103.218126][T10070] RBP: 00000000006dcc30 R08: 0000000000000004 R09: 0000000000000000 [ 103.226083][T10070] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000006dcc3c [ 103.234044][T10070] R13: 00007ffef74e260f R14: 00007f8789a039c0 R15: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program