INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-mmots-kasan-gce-6,10.128.15.220' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 327.076990] [ 327.077368] ====================================================== [ 327.078436] WARNING: possible circular locking dependency detected [ 327.079648] 4.14.0-rc2-mm1+ #11 Not tainted [ 327.080244] ------------------------------------------------------ [ 327.081074] syzkaller685541/7117 is trying to acquire lock: [ 327.081825] (event_mutex){+.+.}, at: [] perf_trace_destroy+0x28/0x100 [ 327.083573] [ 327.083573] but task is already holding lock: [ 327.084437] (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x198/0x280 [ 327.085518] [ 327.085518] which lock already depends on the new lock. [ 327.085518] [ 327.087206] [ 327.087206] the existing dependency chain (in reverse order) is: [ 327.088274] [ 327.088274] -> #7 (&mm->mmap_sem){++++}: [ 327.089071] __lock_acquire+0x328f/0x4620 [ 327.089694] lock_acquire+0x1d5/0x580 [ 327.090273] __might_fault+0x13a/0x1d0 [ 327.090875] _copy_to_user+0x2c/0xc0 [ 327.091511] filldir+0x1a7/0x320 [ 327.092058] dcache_readdir+0x12d/0x5e0 [ 327.092673] iterate_dir+0x4b2/0x5d0 [ 327.093443] SyS_getdents+0x225/0x450 [ 327.094514] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 327.095303] [ 327.095303] -> #6 (&sb->s_type->i_mutex_key#5){++++}: [ 327.096210] down_write+0x87/0x120 [ 327.096754] handle_create+0x30c/0x760 [ 327.098807] devtmpfsd+0x3b4/0x4b0 [ 327.102852] kthread+0x3c9/0x4b0 [ 327.106710] ret_from_fork+0x2a/0x40 [ 327.110925] [ 327.110925] -> #5 ((complete)&req.done){+.+.}: [ 327.116963] __lock_acquire+0x328f/0x4620 [ 327.121775] lock_acquire+0x1d5/0x580 executing program [ 327.126069] wait_for_completion+0xcb/0x7b0 [ 327.130885] devtmpfs_create_node+0x32b/0x4a0 [ 327.135887] device_add+0x120f/0x1640 [ 327.140174] device_create_groups_vargs+0x1f3/0x250 [ 327.145692] device_create+0xda/0x110 [ 327.149982] msr_device_create+0x26/0x40 [ 327.154541] cpuhp_invoke_callback+0x2ea/0x1d20 [ 327.159719] cpuhp_thread_fun+0x48b/0x7e0 [ 327.164367] smpboot_thread_fn+0x450/0x7c0 [ 327.169108] kthread+0x3c9/0x4b0 [ 327.172962] ret_from_fork+0x2a/0x40 [ 327.177162] [ 327.177162] -> #4 (cpuhp_state-up){+.+.}: [ 327.182761] __lock_acquire+0x328f/0x4620 [ 327.187397] lock_acquire+0x1d5/0x580 [ 327.191687] cpuhp_issue_call+0x1e6/0x4b0 [ 327.196323] __cpuhp_setup_state_cpuslocked+0x2c7/0x5f0 [ 327.202171] __cpuhp_setup_state+0xb0/0x140 [ 327.206980] page_writeback_init+0x4d/0x71 [ 327.211702] pagecache_init+0x48/0x4f [ 327.215988] start_kernel+0x6cd/0x760 [ 327.220274] x86_64_start_reservations+0x2a/0x2c executing program [ 327.225516] x86_64_start_kernel+0x77/0x7a [ 327.230237] secondary_startup_64+0xa5/0xb0 [ 327.235043] [ 327.235043] -> #3 (cpuhp_state_mutex){+.+.}: [ 327.240900] __lock_acquire+0x328f/0x4620 [ 327.245531] lock_acquire+0x1d5/0x580 [ 327.249817] __mutex_lock+0x16f/0x19d0 [ 327.254202] mutex_lock_nested+0x16/0x20 [ 327.258759] __cpuhp_setup_state_cpuslocked+0x5b/0x5f0 [ 327.264524] __cpuhp_setup_state+0xb0/0x140 [ 327.269332] kvm_guest_init+0x1f3/0x20f [ 327.273799] setup_arch+0x17d1/0x19eb [ 327.278102] start_kernel+0xa5/0x760 [ 327.282324] x86_64_start_reservations+0x2a/0x2c [ 327.287563] x86_64_start_kernel+0x77/0x7a [ 327.292287] secondary_startup_64+0xa5/0xb0 [ 327.297095] [ 327.297095] -> #2 (cpu_hotplug_lock.rw_sem){++++}: [ 327.303489] __lock_acquire+0x328f/0x4620 [ 327.308125] lock_acquire+0x1d5/0x580 [ 327.312414] cpus_read_lock+0x42/0x90 [ 327.316705] static_key_slow_inc+0x9d/0x3c0 [ 327.321514] tracepoint_probe_register_prio+0x80d/0x9a0 executing program [ 327.327368] tracepoint_probe_register+0x2a/0x40 [ 327.332618] trace_event_reg+0x167/0x320 [ 327.337162] perf_trace_init+0x4ef/0xab0 [ 327.341711] perf_tp_event_init+0x7d/0xf0 [ 327.346343] perf_try_init_event+0xc9/0x1f0 [ 327.351156] perf_event_alloc+0x1c5b/0x2a00 [ 327.355972] SYSC_perf_event_open+0x84e/0x2e00 [ 327.361044] SyS_perf_event_open+0x39/0x50 [ 327.365777] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 327.371028] [ 327.371028] -> #1 (tracepoints_mutex){+.+.}: [ 327.376901] __lock_acquire+0x328f/0x4620 [ 327.381548] lock_acquire+0x1d5/0x580 [ 327.385836] __mutex_lock+0x16f/0x19d0 [ 327.390214] mutex_lock_nested+0x16/0x20 [ 327.394765] tracepoint_probe_register_prio+0xa0/0x9a0 [ 327.400550] tracepoint_probe_register+0x2a/0x40 [ 327.405815] trace_event_reg+0x167/0x320 [ 327.410456] perf_trace_init+0x4ef/0xab0 [ 327.415003] perf_tp_event_init+0x7d/0xf0 [ 327.419646] perf_try_init_event+0xc9/0x1f0 [ 327.424470] perf_event_alloc+0x1c5b/0x2a00 [ 327.429280] SYSC_perf_event_open+0x84e/0x2e00 [ 327.434350] SyS_perf_event_open+0x39/0x50 [ 327.439078] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 327.444325] [ 327.444325] -> #0 (event_mutex){+.+.}: [ 327.449663] check_prev_add+0x865/0x1520 [ 327.454210] __lock_acquire+0x328f/0x4620 [ 327.458842] lock_acquire+0x1d5/0x580 [ 327.463130] __mutex_lock+0x16f/0x19d0 [ 327.467501] mutex_lock_nested+0x16/0x20 [ 327.472048] perf_trace_destroy+0x28/0x100 [ 327.476770] tp_perf_event_destroy+0x15/0x20 [ 327.481671] _free_event+0x41d/0x1170 [ 327.485959] put_event+0x24/0x30 [ 327.489811] perf_mmap_close+0x60d/0xf90 [ 327.494360] remove_vma+0xb4/0x1b0 [ 327.498388] do_munmap+0x82a/0xdf0 [ 327.502414] mmap_region+0x59e/0x15a0 [ 327.506700] do_mmap+0x6a1/0xd50 [ 327.510552] vm_mmap_pgoff+0x1de/0x280 [ 327.514934] SyS_mmap_pgoff+0x23b/0x5f0 [ 327.519392] SyS_mmap+0x16/0x20 [ 327.523158] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 327.528397] [ 327.528397] other info that might help us debug this: [ 327.528397] [ 327.536505] Chain exists of: [ 327.536505] event_mutex --> &sb->s_type->i_mutex_key#5 --> &mm->mmap_sem [ 327.536505] [ 327.547832] Possible unsafe locking scenario: [ 327.547832] [ 327.553869] CPU0 CPU1 [ 327.558508] ---- ---- [ 327.563142] lock(&mm->mmap_sem); [ 327.566648] lock(&sb->s_type->i_mutex_key#5); [ 327.573802] lock(&mm->mmap_sem); [ 327.579823] lock(event_mutex); [ 327.583153] [ 327.583153] *** DEADLOCK *** [ 327.583153] [ 327.589181] 1 lock held by syzkaller685541/7117: [ 327.593900] #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x198/0x280 [ 327.602362] [ 327.602362] stack backtrace: [ 327.606829] CPU: 1 PID: 7117 Comm: syzkaller685541 Not tainted 4.14.0-rc2-mm1+ #11 [ 327.614498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 327.623817] Call Trace: [ 327.626372] dump_stack+0x194/0x257 [ 327.629965] ? arch_local_irq_restore+0x53/0x53 [ 327.634605] print_circular_bug+0x503/0x710 [ 327.638892] ? __kernel_text_address+0xd/0x40 [ 327.643354] ? print_circular_bug_entry+0xb0/0xb0 [ 327.648168] check_prev_add+0x865/0x1520 [ 327.652196] ? copy_trace+0x1d0/0x1d0 [ 327.655962] ? check_usage+0xb70/0xb70 [ 327.659817] ? hlock_class+0x140/0x140 [ 327.664277] ? copy_trace+0x1d0/0x1d0 [ 327.668046] __lock_acquire+0x328f/0x4620 [ 327.672171] ? __lock_acquire+0x328f/0x4620 [ 327.676548] ? copy_trace+0x1d0/0x1d0 [ 327.680316] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 327.685472] ? remove_vma+0xb4/0x1b0 [ 327.689152] ? __unwind_start+0x169/0x330 [ 327.693268] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 327.698251] ? unwind_next_frame.part.6+0x1ae/0xc70 [ 327.703231] ? unwind_dump+0x4c0/0x4c0 [ 327.707093] ? unwind_dump+0x4c0/0x4c0 [ 327.710947] ? mmap_region+0x59e/0x15a0 [ 327.714889] ? __unwind_start+0x169/0x330 [ 327.719017] ? __kernel_text_address+0xd/0x40 [ 327.723487] ? unwind_get_return_address+0x61/0xa0 [ 327.728392] ? __save_stack_trace+0x61/0xd0 [ 327.732681] ? remove_vma+0xb4/0x1b0 [ 327.736367] ? save_stack_trace+0x16/0x20 [ 327.740484] ? __lock_acquire+0x20fd/0x4620 [ 327.744773] ? __unwind_start+0x169/0x330 [ 327.748893] ? __kernel_text_address+0xd/0x40 [ 327.753355] ? unwind_get_return_address+0x61/0xa0 [ 327.758253] ? check_noncircular+0x20/0x20 [ 327.762455] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 327.767626] ? mmap_region+0x59e/0x15a0 [ 327.771565] ? save_stack_trace+0x16/0x20 [ 327.775678] ? __lock_acquire+0x20fd/0x4620 [ 327.779966] ? __lock_acquire+0x732/0x4620 [ 327.784172] lock_acquire+0x1d5/0x580 [ 327.787957] ? perf_trace_destroy+0x28/0x100 [ 327.792334] ? debug_check_no_locks_freed+0x3d0/0x3d0 [ 327.797491] ? lock_release+0xd70/0xd70 [ 327.801434] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 327.807284] ? rcu_note_context_switch+0x710/0x710 [ 327.812181] ? __might_sleep+0x95/0x190 [ 327.816125] ? perf_trace_destroy+0x28/0x100 [ 327.820501] __mutex_lock+0x16f/0x19d0 [ 327.824354] ? perf_trace_destroy+0x28/0x100 [ 327.828741] ? lock_acquire+0x1d5/0x580 [ 327.832681] ? perf_trace_destroy+0x28/0x100 [ 327.837061] ? check_noncircular+0x20/0x20 [ 327.841263] ? mutex_lock_io_nested+0x1880/0x1880 [ 327.846071] ? print_usage_bug+0x480/0x480 [ 327.850275] ? find_held_lock+0x39/0x1d0 [ 327.854301] ? check_noncircular+0x20/0x20 [ 327.858502] ? mark_held_locks+0xb2/0x100 [ 327.862614] ? retint_kernel+0x10/0x10 [ 327.866468] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 327.871451] ? find_held_lock+0x39/0x1d0 [ 327.875479] ? check_noncircular+0x20/0x20 [ 327.879683] ? perf_addr_filters_splice+0x18f/0x810 [ 327.884664] ? lock_downgrade+0x990/0x990 [ 327.888780] ? free_filters_list+0x2f0/0x2f0 [ 327.893154] ? _raw_spin_unlock_irqrestore+0x5e/0xba [ 327.898234] ? __lock_is_held+0xbc/0x140 [ 327.902262] mutex_lock_nested+0x16/0x20 [ 327.906287] ? mutex_lock_nested+0x16/0x20 [ 327.910487] perf_trace_destroy+0x28/0x100 [ 327.914696] ? perf_tp_event_init+0xf0/0xf0 [ 327.918983] tp_perf_event_destroy+0x15/0x20 [ 327.923359] _free_event+0x41d/0x1170 [ 327.927125] ? ring_buffer_attach+0x830/0x830 [ 327.931584] ? wait_for_completion+0x7b0/0x7b0 [ 327.936132] ? ring_buffer_put+0x140/0x140 [ 327.940341] ? lock_release+0xd70/0xd70 [ 327.944280] ? atomic_dec_and_mutex_lock+0x112/0x150 [ 327.949346] ? atomic_dec_and_mutex_lock+0x112/0x150 [ 327.954509] put_event+0x24/0x30 [ 327.957933] perf_mmap_close+0x60d/0xf90 [ 327.961965] ? perf_compat_ioctl+0x70/0x70 [ 327.966169] ? save_stack_trace+0x16/0x20 [ 327.970281] ? check_noncircular+0x20/0x20 [ 327.974485] ? remove_vma+0x162/0x1b0 [ 327.978252] ? do_munmap+0x82a/0xdf0 [ 327.981930] ? mmap_region+0x59e/0x15a0 [ 327.985870] ? vm_mmap_pgoff+0x1de/0x280 [ 327.989896] ? SyS_mmap_pgoff+0x23b/0x5f0 [ 327.994013] ? SyS_mmap+0x16/0x20 [ 327.997437] ? entry_SYSCALL_64_fastpath+0x1f/0xbe [ 328.002333] ? check_noncircular+0x20/0x20 [ 328.006533] ? reusable_anon_vma+0x560/0x560 [ 328.010911] ? __lock_is_held+0xbc/0x140 [ 328.014943] ? trace_event_raw_event_sched_switch+0x770/0x770 [ 328.020794] ? rcu_note_context_switch+0x710/0x710 [ 328.025691] ? __might_sleep+0x95/0x190 [ 328.029632] ? perf_compat_ioctl+0x70/0x70 [ 328.033834] remove_vma+0xb4/0x1b0 [ 328.037340] do_munmap+0x82a/0xdf0 [ 328.040847] mmap_region+0x59e/0x15a0 [ 328.044626] ? SyS_brk+0x6f0/0x6f0 [ 328.048131] ? arch_get_unmapped_area_topdown+0xba/0x8a0 [ 328.053635] ? arch_get_unmapped_area+0x750/0x750 [ 328.058441] ? lock_acquire+0x1d5/0x580 [ 328.062382] ? vm_mmap_pgoff+0x198/0x280 [ 328.066410] ? selinux_mmap_addr+0x1f/0xf0 [ 328.070784] ? security_mmap_addr+0x79/0xa0 [ 328.075071] ? get_unmapped_area+0x265/0x300