[info] Using makefile-style concurrent boot in runlevel 2. [ 24.753390] audit: type=1800 audit(1540287370.493:21): pid=5211 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [....] 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 '10.128.0.13' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 132.631875] [ 132.633591] ====================================================== [ 132.639910] WARNING: possible circular locking dependency detected [ 132.645442] syz-executor460 (5381) used greatest stack depth: 13176 bytes left [ 132.646229] 4.19.0+ #298 Not tainted [ 132.646234] ------------------------------------------------------ [ 132.646248] syz-executor460/5379 is trying to acquire lock: [ 132.646255] 00000000cba2efd5 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: flush_workqueue+0x2db/0x1e10 [ 132.678798] [ 132.678798] but task is already holding lock: [ 132.684756] 00000000a7636398 (&sb->s_type->i_mutex_key#10){+.+.}, at: ext4_file_write_iter+0x2a1/0x1420 [ 132.694313] [ 132.694313] which lock already depends on the new lock. [ 132.694313] [ 132.702614] [ 132.702614] the existing dependency chain (in reverse order) is: [ 132.710214] [ 132.710214] -> #2 (&sb->s_type->i_mutex_key#10){+.+.}: [ 132.716968] down_write+0x8a/0x130 [ 132.721024] __generic_file_fsync+0xb5/0x200 [ 132.725953] ext4_sync_file+0xa4f/0x1510 [ 132.730526] vfs_fsync_range+0x140/0x220 [ 132.735104] dio_complete+0x75c/0x9e0 [ 132.739412] dio_aio_complete_work+0x20/0x30 [ 132.744335] process_one_work+0xc90/0x1c40 [ 132.749204] worker_thread+0x17f/0x1390 [ 132.753688] kthread+0x35a/0x420 [ 132.757561] ret_from_fork+0x3a/0x50 [ 132.761873] [ 132.761873] -> #1 ((work_completion)(&dio->complete_work)){+.+.}: [ 132.769580] process_one_work+0xc0a/0x1c40 [ 132.774322] worker_thread+0x17f/0x1390 [ 132.778814] kthread+0x35a/0x420 [ 132.782703] ret_from_fork+0x3a/0x50 [ 132.786917] [ 132.786917] -> #0 ((wq_completion)"dio/%s"sb->s_id){+.+.}: [ 132.794016] lock_acquire+0x1ed/0x520 [ 132.798323] flush_workqueue+0x30a/0x1e10 [ 132.803055] drain_workqueue+0x2a9/0x640 [ 132.807626] destroy_workqueue+0xc6/0x9c0 [ 132.812442] sb_init_dio_done_wq+0x74/0x90 [ 132.817190] do_blockdev_direct_IO+0x12ea/0x9d70 [ 132.822578] __blockdev_direct_IO+0x9d/0xc6 [ 132.827415] ext4_direct_IO+0xae8/0x2230 [ 132.831990] generic_file_direct_write+0x275/0x4b0 [ 132.837430] __generic_file_write_iter+0x2ff/0x630 [ 132.842872] ext4_file_write_iter+0x390/0x1420 [ 132.847965] aio_write+0x3b1/0x610 [ 132.852117] io_submit_one+0xaa1/0xf80 [ 132.856513] __x64_sys_io_submit+0x1b7/0x580 [ 132.861527] do_syscall_64+0x1b9/0x820 [ 132.865926] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 132.871616] [ 132.871616] other info that might help us debug this: [ 132.871616] [ 132.879757] Chain exists of: [ 132.879757] (wq_completion)"dio/%s"sb->s_id --> (work_completion)(&dio->complete_work) --> &sb->s_type->i_mutex_key#10 [ 132.879757] [ 132.895114] Possible unsafe locking scenario: [ 132.895114] [ 132.901175] CPU0 CPU1 [ 132.905824] ---- ---- [ 132.910474] lock(&sb->s_type->i_mutex_key#10); [ 132.915228] lock((work_completion)(&dio->complete_work)); [ 132.923501] lock(&sb->s_type->i_mutex_key#10); [ 132.930768] lock((wq_completion)"dio/%s"sb->s_id); [ 132.935854] [ 132.935854] *** DEADLOCK *** [ 132.935854] [ 132.941905] 1 lock held by syz-executor460/5379: [ 132.946649] #0: 00000000a7636398 (&sb->s_type->i_mutex_key#10){+.+.}, at: ext4_file_write_iter+0x2a1/0x1420 [ 132.956619] [ 132.956619] stack backtrace: [ 132.961103] CPU: 1 PID: 5379 Comm: syz-executor460 Not tainted 4.19.0+ #298 [ 132.968181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 132.977637] Call Trace: [ 132.980213] dump_stack+0x1c4/0x2b6 [ 132.983834] ? dump_stack_print_info.cold.1+0x20/0x20 [ 132.989011] ? vprintk_func+0x85/0x181 [ 132.992889] print_circular_bug.isra.33.cold.54+0x1bd/0x27d [ 132.998593] ? save_trace+0xe0/0x290 [ 133.002331] __lock_acquire+0x33e4/0x4ec0 [ 133.006471] ? cpuacct_charge+0x265/0x440 [ 133.010607] ? mark_held_locks+0x130/0x130 [ 133.014827] ? update_curr+0x4cf/0xbe0 [ 133.018701] ? lock_downgrade+0x900/0x900 [ 133.022834] ? check_preemption_disabled+0x48/0x280 [ 133.027846] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 133.033780] ? kasan_check_read+0x11/0x20 [ 133.037933] ? mark_held_locks+0x130/0x130 [ 133.042153] ? lock_downgrade+0x900/0x900 [ 133.046287] ? check_preemption_disabled+0x48/0x280 [ 133.051291] ? graph_lock+0x170/0x170 [ 133.055162] ? __enqueue_entity+0x10d/0x1f0 [ 133.059476] ? __lock_is_held+0xb5/0x140 [ 133.063526] lock_acquire+0x1ed/0x520 [ 133.067317] ? flush_workqueue+0x2db/0x1e10 [ 133.071635] ? lock_release+0x970/0x970 [ 133.075612] ? lockdep_init_map+0x9/0x10 [ 133.079674] ? __init_waitqueue_head+0x9e/0x150 [ 133.084330] ? init_wait_entry+0x1c0/0x1c0 [ 133.088556] flush_workqueue+0x30a/0x1e10 [ 133.092695] ? flush_workqueue+0x2db/0x1e10 [ 133.097014] ? lock_acquire+0x1ed/0x520 [ 133.100986] ? drain_workqueue+0xa9/0x640 [ 133.105296] ? lock_release+0x970/0x970 [ 133.109255] ? lock_release+0x970/0x970 [ 133.113214] ? arch_local_save_flags+0x40/0x40 [ 133.117792] ? check_preemption_disabled+0x48/0x280 [ 133.122914] ? check_preemption_disabled+0x48/0x280 [ 133.127928] ? flush_rcu_work+0x90/0x90 [ 133.131958] ? graph_lock+0x170/0x170 [ 133.135757] ? __mutex_lock+0x85e/0x1700 [ 133.139810] ? __mutex_lock+0x85e/0x1700 [ 133.143856] ? drain_workqueue+0xa9/0x640 [ 133.147996] ? __alloc_workqueue_key+0x81f/0x1170 [ 133.152824] ? find_held_lock+0x36/0x1c0 [ 133.156877] ? drain_workqueue+0x13f/0x640 [ 133.161236] ? lock_downgrade+0x900/0x900 [ 133.165455] ? lock_downgrade+0x900/0x900 [ 133.169605] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 133.174809] ? try_to_wake_up+0x10a/0x12f0 [ 133.179083] ? find_held_lock+0x36/0x1c0 [ 133.183165] ? graph_lock+0x170/0x170 [ 133.187184] ? kasan_check_write+0x14/0x20 [ 133.191518] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 133.196434] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 133.201349] ? wait_for_completion+0x8a0/0x8a0 [ 133.206032] ? wait_for_completion+0x8a0/0x8a0 [ 133.210611] ? pwq_activate_delayed_work+0x650/0x650 [ 133.215708] drain_workqueue+0x2a9/0x640 [ 133.219756] ? drain_workqueue+0x2a9/0x640 [ 133.223983] ? __alloc_workqueue_key+0xa1f/0x1170 [ 133.228960] ? flush_workqueue+0x1e10/0x1e10 [ 133.233355] ? workqueue_sysfs_register+0x3f0/0x3f0 [ 133.238465] ? save_stack+0x43/0xd0 [ 133.242095] ? kasan_kmalloc+0xc7/0xe0 [ 133.245970] ? kasan_slab_alloc+0x12/0x20 [ 133.250188] ? kmem_cache_alloc+0x12e/0x730 [ 133.254587] ? __blockdev_direct_IO+0x9d/0xc6 [ 133.259070] ? ext4_direct_IO+0xae8/0x2230 [ 133.263383] ? generic_file_direct_write+0x275/0x4b0 [ 133.268586] ? __generic_file_write_iter+0x2ff/0x630 [ 133.273692] ? ext4_file_write_iter+0x390/0x1420 [ 133.278501] ? aio_write+0x3b1/0x610 [ 133.282313] ? io_submit_one+0xaa1/0xf80 [ 133.286375] ? do_syscall_64+0x1b9/0x820 [ 133.290425] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 133.295785] destroy_workqueue+0xc6/0x9c0 [ 133.299921] ? wq_watchdog_timer_fn+0x810/0x810 [ 133.304831] ? graph_lock+0x170/0x170 [ 133.308618] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.314236] ? check_preemption_disabled+0x48/0x280 [ 133.319249] ? check_preemption_disabled+0x48/0x280 [ 133.324280] ? __lock_is_held+0xb5/0x140 [ 133.328342] ? rcu_read_lock_sched_held+0x108/0x120 [ 133.333353] ? kmem_cache_alloc+0x33a/0x730 [ 133.337678] sb_init_dio_done_wq+0x74/0x90 [ 133.341900] do_blockdev_direct_IO+0x12ea/0x9d70 [ 133.346642] ? find_held_lock+0x36/0x1c0 [ 133.350705] ? write_end_fn+0xf0/0xf0 [ 133.354487] ? ext4_get_block_trans+0x2e0/0x2e0 [ 133.359141] ? do_direct_IO+0xc110/0xc110 [ 133.363350] ? kasan_check_read+0x11/0x20 [ 133.367518] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 133.372782] ? rcu_bh_qs+0xc0/0xc0 [ 133.376316] ? replace_slot+0x151/0x520 [ 133.380314] ? radix_tree_delete+0x30/0x30 [ 133.384550] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 133.389562] ? __delete_from_page_cache+0x6ed/0xdf0 [ 133.394563] ? graph_lock+0x170/0x170 [ 133.398346] ? print_usage_bug+0xc0/0xc0 [ 133.402393] ? page_mapped+0x366/0x810 [ 133.406261] ? graph_lock+0x170/0x170 [ 133.410046] ? find_held_lock+0x36/0x1c0 [ 133.414091] ? __lock_is_held+0xb5/0x140 [ 133.418137] ? kasan_check_read+0x11/0x20 [ 133.422270] ? ___might_sleep+0x1ed/0x300 [ 133.426403] ? arch_local_save_flags+0x40/0x40 [ 133.430994] ? pagevec_lookup_entries+0x3a/0x80 [ 133.435664] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.441298] ? invalidate_inode_pages2_range+0x153c/0x1be0 [ 133.446915] ? pagecache_isize_extended+0x440/0x440 [ 133.451919] ? mark_held_locks+0xc7/0x130 [ 133.456056] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 133.461157] ? graph_lock+0x170/0x170 [ 133.464985] ? lockdep_hardirqs_on+0x421/0x5c0 [ 133.469564] ? kasan_check_read+0x11/0x20 [ 133.473706] ? pagevec_lru_move_fn+0x259/0x350 [ 133.478302] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 133.483749] ? __lock_is_held+0xb5/0x140 [ 133.487830] ? graph_lock+0x170/0x170 [ 133.491642] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.497290] ? check_preemption_disabled+0x48/0x280 [ 133.502410] ? check_preemption_disabled+0x48/0x280 [ 133.507416] ? __lock_is_held+0xb5/0x140 [ 133.511462] ? ext4_get_block_trans+0x2e0/0x2e0 [ 133.516118] __blockdev_direct_IO+0x9d/0xc6 [ 133.520430] ? write_end_fn+0xf0/0xf0 [ 133.524286] ? ext4_get_block_trans+0x2e0/0x2e0 [ 133.528946] ext4_direct_IO+0xae8/0x2230 [ 133.533000] ? ext4_iomap_end+0x810/0x810 [ 133.537152] ? wbc_attach_and_unlock_inode+0xa30/0xa30 [ 133.542413] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.548047] ? __filemap_fdatawrite_range+0x2ab/0x4a0 [ 133.553225] ? delete_from_page_cache_batch+0x11f0/0x11f0 [ 133.558768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.564334] ? file_update_time+0xe4/0x640 [ 133.568561] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 133.574081] ? filemap_check_errors+0xd8/0x110 [ 133.578649] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.584174] generic_file_direct_write+0x275/0x4b0 [ 133.589103] __generic_file_write_iter+0x2ff/0x630 [ 133.594030] ext4_file_write_iter+0x390/0x1420 [ 133.598596] ? __fget+0x4d1/0x740 [ 133.602049] ? ext4_file_mmap+0x410/0x410 [ 133.606183] ? find_held_lock+0x36/0x1c0 [ 133.610306] ? aio_write+0x4ce/0x610 [ 133.614025] ? lock_downgrade+0x900/0x900 [ 133.618167] ? __lock_is_held+0xb5/0x140 [ 133.622222] ? rcu_read_lock_sched_held+0x108/0x120 [ 133.627227] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 133.632750] ? __sb_start_write+0x1b2/0x370 [ 133.637073] aio_write+0x3b1/0x610 [ 133.640614] ? aio_complete_rw+0x640/0x640 [ 133.644847] ? lock_downgrade+0x900/0x900 [ 133.648994] ? kasan_check_read+0x11/0x20 [ 133.653132] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 133.658398] io_submit_one+0xaa1/0xf80 [ 133.662302] ? aio_poll+0x1420/0x1420 [ 133.666221] ? __might_fault+0x12b/0x1e0 [ 133.670272] ? lock_downgrade+0x900/0x900 [ 133.674443] ? arch_local_save_flags+0x40/0x40 [ 133.679026] ? __lock_is_held+0xb5/0x140 [ 133.683137] __x64_sys_io_submit+0x1b7/0x580 [ 133.687538] ? __ia32_sys_io_destroy+0x580/0x580 [ 133.692284] ? trace_hardirqs_on+0xbd/0x310 [ 133.696597] ? __ia32_sys_read+0xb0/0xb0 [ 133.700649] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 133.705997] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 133.711433] ? do_sys_ftruncate+0x449/0x550 [ 133.715750] do_syscall_64+0x1b9/0x820 [ 133.719630] ? __ia32_sys_io_destroy+0x580/0x580 [ 133.724372] ? do_syscall_64+0x1b9/0x820 [ 133.728419] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 133.733777] ? syscall_return_slowpath+0x5e0/0x5e0 [ 133.738709] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 133.743651] ? trace_hardirqs_on_caller+0x310/0x310 [ 133.748659] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 133.753670] ? prepare_exit_to_usermode+0x291/0x3b0 [ 133.758687] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 133.763548] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 133.768722] RIP: 0033:0x4469b9 [ 133.771914] Code: e8 dc e6 ff ff 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 4b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 133.790913] RSP: 002b:00007fbd534a7da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 133.798608] RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 00000000004469b9 [ 133.805865] RDX: 0000000020000540 RSI: 0000000000000008 RDI: 00007fbd53487000 [ 133.813207] RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 [ 133.820473] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c [ 133.827725] R13: 8000000000044000 R14: 00007fbd534a89c0 R15: 00000000006dcd4c executing program executing program executing program executing program executing program executing program executing program [ 133.924336] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 133.941606] File: /root/syzkaller.jTMKK3/1/bus PID: 14 Comm: kworker/0:1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 134.088521] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.100152] File: /root/syzkaller.jTMKK3/3/bus PID: 14 Comm: kworker/0:1 executing program executing program executing program executing program [ 134.139407] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.151914] File: /root/syzkaller.itrSF4/4/bus PID: 5 Comm: kworker/0:0 executing program executing program executing program executing program executing program executing program [ 134.229047] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.241924] File: /root/syzkaller.itrSF4/5/bus PID: 5 Comm: kworker/0:0 [ 134.257629] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.269372] File: /root/syzkaller.qGPxI4/5/bus PID: 14 Comm: kworker/0:1 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 134.370461] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.382523] File: /root/syzkaller.qGPxI4/6/bus PID: 5 Comm: kworker/0:0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 134.518232] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.530960] File: /root/syzkaller.FhXGz4/9/bus PID: 14 Comm: kworker/0:1 executing program executing program executing program [ 134.576212] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.588179] File: /root/syzkaller.itrSF4/9/bus PID: 5394 Comm: kworker/0:4 [ 134.609502] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! executing program executing program executing program [ 134.622284] File: /root/syzkaller.FhXGz4/10/bus PID: 5394 Comm: kworker/0:4 [ 134.632238] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 134.644532] File: /root/syzkaller.qGPxI4/9/bus PID: 5394 Comm: kworker/0:4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program