audit: type=1326 audit(2000001150.538:933): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31678 comm="syz-executor3" exe="/root/syz-executor3" sig=9 arch=c000003e syscall=228 compat=0 ip=0x45a3ca code=0x0 audit: type=1326 audit(2000001151.338:934): auid=4294967295 uid=0 gid=0 ses=4294967295 subj==unconfined pid=31678 comm="syz-executor3" exe="/root/syz-executor3" sig=9 arch=c000003e syscall=228 compat=0 ip=0x45a3ca code=0x0 BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 156s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=6/256 pending: defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, vmstat_shepherd, cache_reap ====================================================== WARNING: possible circular locking dependency detected 4.19.0-rc8+ #284 Not tainted ------------------------------------------------------ syz-executor0/31633 is trying to acquire lock: 0000000012231d52 (console_owner){-.-.}, at: log_next kernel/printk/printk.c:497 [inline] 0000000012231d52 (console_owner){-.-.}, at: console_unlock+0x560/0x1160 kernel/printk/printk.c:2392 but task is already holding lock: 00000000d61957a3 (&(&pool->lock)->rlock){-.-.}, at: show_workqueue_state.cold.49+0xad0/0x159a kernel/workqueue.c:4557 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&(&pool->lock)->rlock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __queue_work+0x34c/0x1440 kernel/workqueue.c:1417 queue_work_on+0x19a/0x1e0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:512 [inline] schedule_work include/linux/workqueue.h:570 [inline] put_pwq+0x175/0x1c0 kernel/workqueue.c:1090 put_pwq_unlocked.part.28+0x34/0x70 kernel/workqueue.c:1107 put_pwq_unlocked kernel/workqueue.c:1101 [inline] destroy_workqueue+0x868/0x9c0 kernel/workqueue.c:4217 tipc_topsrv_work_stop net/tipc/topsrv.c:641 [inline] tipc_topsrv_stop+0x4ad/0x6ca net/tipc/topsrv.c:700 tipc_exit_net+0x15/0x40 net/tipc/core.c:100 ops_exit_list.isra.7+0xb0/0x160 net/core/net_namespace.c:153 setup_net+0x56e/0x950 net/core/net_namespace.c:331 copy_net_ns+0x2b1/0x4a0 net/core/net_namespace.c:437 create_new_namespaces+0x6ad/0x900 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x79c/0x10b0 kernel/fork.c:2489 __do_sys_unshare kernel/fork.c:2557 [inline] __se_sys_unshare kernel/fork.c:2555 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:2555 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #3 (&pool->lock/1){..-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __queue_work+0x34c/0x1440 kernel/workqueue.c:1417 queue_work_on+0x19a/0x1e0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:512 [inline] tty_schedule_flip+0x14c/0x1d0 drivers/tty/tty_buffer.c:408 tty_flip_buffer_push+0x15/0x20 drivers/tty/tty_buffer.c:547 pty_write+0x19d/0x1f0 drivers/tty/pty.c:124 n_tty_write+0xc5b/0x11a0 drivers/tty/n_tty.c:2340 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x3f1/0x880 drivers/tty/tty_io.c:1042 __vfs_write+0x119/0x9f0 fs/read_write.c:485 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 tty_port_tty_get+0x20/0x80 drivers/tty/tty_port.c:288 tty_port_default_wakeup+0x15/0x40 drivers/tty/tty_port.c:47 tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:390 uart_write_wakeup+0x44/0x60 drivers/tty/serial/serial_core.c:103 serial8250_tx_chars+0x4be/0xb60 drivers/tty/serial/8250/8250_port.c:1806 serial8250_handle_irq.part.23+0x1ee/0x280 drivers/tty/serial/8250/8250_port.c:1879 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1865 [inline] serial8250_default_handle_irq+0xc8/0x150 drivers/tty/serial/8250/8250_port.c:1895 serial8250_interrupt+0xfa/0x1d0 drivers/tty/serial/8250/8250_core.c:125 __handle_irq_event_percpu+0x1e6/0xb00 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x227/0x880 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78 do_IRQ+0x98/0x1c0 arch/x86/kernel/irq.c:246 ret_from_intr+0x0/0x1e native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3db/0x5b0 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 start_secondary+0x447/0x5f0 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 serial8250_console_write+0x8dd/0xb10 drivers/tty/serial/8250/8250_port.c:3247 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590 call_console_drivers kernel/printk/printk.c:1724 [inline] console_unlock+0xcd7/0x1160 kernel/printk/printk.c:2405 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1963 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1996 register_console+0x7e6/0xc00 kernel/printk/printk.c:2720 univ8250_console_init+0x3f/0x4b drivers/tty/serial/8250/8250_core.c:685 console_init+0x6ac/0x9dc kernel/printk/printk.c:2806 start_kernel+0x613/0x92f init/main.c:661 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #0 (console_owner){-.-.}: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900 console_lock_spinning_enable kernel/printk/printk.c:1587 [inline] console_unlock+0x5cd/0x1160 kernel/printk/printk.c:2402 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1963 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1996 show_pwq kernel/workqueue.c:4464 [inline] show_workqueue_state.cold.49+0xc6c/0x159a kernel/workqueue.c:4559 wq_watchdog_timer_fn+0x6ea/0x810 kernel/workqueue.c:5571 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 run_timer_softirq+0x88/0xb0 kernel/time/timer.c:1697 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] lock_acquire+0x268/0x520 kernel/locking/lockdep.c:3903 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __find_get_block_slow fs/buffer.c:209 [inline] __find_get_block+0x661/0xf20 fs/buffer.c:1294 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x300 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_search_long+0x33b/0x1570 fs/fat/dir.c:477 vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697 vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711 lookup_open+0x72e/0x1b90 fs/namei.c:3213 do_last fs/namei.c:3324 [inline] path_openat+0x15e7/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1276 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: console_owner --> &pool->lock/1 --> &(&pool->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&pool->lock)->rlock); lock(&pool->lock/1); lock(&(&pool->lock)->rlock); lock(console_owner); *** DEADLOCK *** 7 locks held by syz-executor0/31633: #0: 00000000d507a4dc (&sb->s_type->i_mutex_key#22){++++}, at: inode_lock include/linux/fs.h:738 [inline] #0: 00000000d507a4dc (&sb->s_type->i_mutex_key#22){++++}, at: do_last fs/namei.c:3321 [inline] #0: 00000000d507a4dc (&sb->s_type->i_mutex_key#22){++++}, at: path_openat+0x15c7/0x5160 fs/namei.c:3534 #1: 000000009a68a2e7 (&sbi->s_lock){+.+.}, at: vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 #2: 0000000083a7ff16 (&(&mapping->private_lock)->rlock){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline] #2: 0000000083a7ff16 (&(&mapping->private_lock)->rlock){+.+.}, at: __find_get_block_slow fs/buffer.c:209 [inline] #2: 0000000083a7ff16 (&(&mapping->private_lock)->rlock){+.+.}, at: __find_get_block+0x661/0xf20 fs/buffer.c:1294 #3: 0000000005319f81 ((&wq_watchdog_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:178 [inline] #3: 0000000005319f81 ((&wq_watchdog_timer)){+.-.}, at: call_timer_fn+0x1db/0x920 kernel/time/timer.c:1316 #4: 000000005fa60ca8 (rcu_read_lock_sched){....}, at: show_workqueue_state+0x0/0x1d0 kernel/workqueue.c:4423 #5: 00000000d61957a3 (&(&pool->lock)->rlock){-.-.}, at: show_workqueue_state.cold.49+0xad0/0x159a kernel/workqueue.c:4557 #6: 00000000d90c3a85 (console_lock){+.+.}, at: console_trylock_spinning kernel/printk/printk.c:1649 [inline] #6: 00000000d90c3a85 (console_lock){+.+.}, at: vprintk_emit+0x322/0x930 kernel/printk/printk.c:1921 stack backtrace: CPU: 0 PID: 31633 Comm: syz-executor0 Not tainted 4.19.0-rc8+ #284 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 print_circular_bug.isra.33.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1861 [inline] check_prevs_add kernel/locking/lockdep.c:1974 [inline] validate_chain kernel/locking/lockdep.c:2415 [inline] __lock_acquire+0x33e4/0x4ec0 kernel/locking/lockdep.c:3411 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900 console_lock_spinning_enable kernel/printk/printk.c:1587 [inline] console_unlock+0x5cd/0x1160 kernel/printk/printk.c:2402 vprintk_emit+0x33d/0x930 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1963 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1996 show_pwq kernel/workqueue.c:4464 [inline] show_workqueue_state.cold.49+0xc6c/0x159a kernel/workqueue.c:4559 wq_watchdog_timer_fn+0x6ea/0x810 kernel/workqueue.c:5571 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 Lost 160 message(s)! workqueue events_long: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 pending: br_fdb_cleanup, br_fdb_cleanup workqueue events_power_efficient: flags=0x80 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 pending: neigh_periodic_work, check_lifetime, do_cache_clean workqueue kblockd: flags=0x18 pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 pending: blk_mq_requeue_work workqueue ipv6_addrconf: flags=0x40008 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 pending: addrconf_verify_work INFO: task jbd2/sda1-8:3078 blocked for more than 140 seconds. Not tainted 4.19.0-rc8+ #284 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. jbd2/sda1-8 D17624 3078 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 io_schedule+0x1c/0x70 kernel/sched/core.c:5140 bit_wait_io+0xf/0x90 kernel/sched/wait_bit.c:207 __wait_on_bit+0xb3/0x130 kernel/sched/wait_bit.c:48 out_of_line_wait_on_bit+0x213/0x3c0 kernel/sched/wait_bit.c:63 wait_on_bit_io include/linux/wait_bit.h:101 [inline] __wait_on_buffer+0x71/0x90 fs/buffer.c:118 wait_on_buffer include/linux/buffer_head.h:354 [inline] journal_wait_on_commit_record fs/jbd2/commit.c:175 [inline] jbd2_journal_commit_transaction+0x6397/0x89f8 fs/jbd2/commit.c:866 kjournald2+0x26d/0xb30 fs/jbd2/journal.c:229 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 INFO: task syz-executor0:31671 blocked for more than 140 seconds. Not tainted 4.19.0-rc8+ #284 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D24952 31671 5402 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 inode_lock include/linux/fs.h:738 [inline] do_last fs/namei.c:3321 [inline] path_openat+0x15c7/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1276 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: Bad RIP value. RSP: 002b:00007fbab5903c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbab59046d4 R13: 00000000004bdb2f R14: 00000000004cc688 R15: 00000000ffffffff INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 983 Comm: khungtaskd Not tainted 4.19.0-rc8+ #284 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.083 msecs NMI backtrace for cpu 0 CPU: 0 PID: 31633 Comm: syz-executor0 Not tainted 4.19.0-rc8+ #284 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x1f4/0x4ec0 kernel/locking/lockdep.c:3270 Code: 85 c0 48 89 c3 0f 85 b3 00 00 00 45 31 ff 48 ba 00 00 00 00 00 fc ff df 48 03 94 24 90 00 00 00 31 c0 b9 0a 00 00 00 48 89 d7 48 ab 44 89 f8 c7 07 00 00 00 00 48 8b b4 24 58 03 00 00 65 48 RSP: 0018:ffff88017353e170 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 1ffff1002e6a7cab RCX: 0000000000000006 RDX: ffffed002e6a7c42 RSI: 0000000000000000 RDI: ffffed002e6a7c62 RBP: ffff88017353e500 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8939a7e0 R14: ffff88017a97a680 R15: 0000000000000000 FS: 00007fbab5946700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d524000 CR3: 000000017f881000 CR4: 00000000001426f0 Call Trace: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900 rcu_lock_acquire include/linux/rcupdate.h:244 [inline] rcu_read_lock include/linux/rcupdate.h:629 [inline] find_get_entry+0x12e/0xc40 mm/filemap.c:1428 pagecache_get_page+0x12f/0xf00 mm/filemap.c:1541 find_get_page_flags include/linux/pagemap.h:278 [inline] __find_get_block_slow fs/buffer.c:205 [inline] __find_get_block+0x63a/0xf20 fs/buffer.c:1294 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x300 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_search_long+0x33b/0x1570 fs/fat/dir.c:477 vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697 vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711 lookup_open+0x72e/0x1b90 fs/namei.c:3213 do_last fs/namei.c:3324 [inline] path_openat+0x15e7/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1276 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbab5945c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbab59466d4 R13: 00000000004bdb2f R14: 00000000004cc688 R15: 00000000ffffffff