INFO: task jbd2/sda1-8:75 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. jbd2/sda1-8 D27160 75 2 0x80000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 io_schedule+0x1c/0x70 kernel/sched/core.c:5097 bit_wait_io+0x9/0x90 kernel/sched/wait_bit.c:249 __wait_on_bit+0xad/0x130 kernel/sched/wait_bit.c:51 out_of_line_wait_on_bit+0xd1/0x100 kernel/sched/wait_bit.c:64 wait_on_bit_io include/linux/wait_bit.h:106 [inline] __wait_on_buffer+0x58/0x70 fs/buffer.c:125 wait_on_buffer include/linux/buffer_head.h:354 [inline] journal_wait_on_commit_record fs/jbd2/commit.c:177 [inline] jbd2_journal_commit_transaction+0x484a/0x648c fs/jbd2/commit.c:868 kjournald2+0x244/0x820 fs/jbd2/journal.c:233 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task syz-executor0:1845 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D26800 1845 1 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_log_wait_commit+0x2a5/0x3f0 fs/jbd2/journal.c:730 jbd2_journal_stop+0x8df/0x1280 fs/jbd2/transaction.c:1782 __ext4_journal_stop+0xcd/0x1e0 fs/ext4/ext4_jbd2.c:103 ext4_evict_inode+0xa57/0x1520 fs/ext4/inode.c:334 evict+0x2cb/0x5f0 fs/inode.c:554 iput_final fs/inode.c:1516 [inline] iput+0x373/0x8e0 fs/inode.c:1543 do_unlinkat+0x4bf/0x650 fs/namei.c:4103 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4573c7 RSP: 002b:00007ffcc0676028 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004573c7 RDX: 00007ffcc0676040 RSI: 00007ffcc06760d0 RDI: 00007ffcc06760d0 RBP: 0000000000000423 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 00007ffcc0677130 R13: 00000000021e4940 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor3:1847 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D27400 1847 1 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_log_wait_commit+0x2a5/0x3f0 fs/jbd2/journal.c:730 jbd2_journal_stop+0x8df/0x1280 fs/jbd2/transaction.c:1782 __ext4_journal_stop+0xcd/0x1e0 fs/ext4/ext4_jbd2.c:103 ext4_mkdir+0x797/0xb40 fs/ext4/namei.c:2659 vfs_mkdir2+0x3cb/0x640 fs/namei.c:3836 SYSC_mkdirat fs/namei.c:3865 [inline] SyS_mkdirat+0x126/0x220 fs/namei.c:3849 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x456ab7 RSP: 002b:00007ffc6ba79fc8 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 000000000003a528 RCX: 0000000000456ab7 RDX: 00007ffc6ba79fe5 RSI: 00000000000001ff RDI: 00007ffc6ba79fe0 RBP: 0000000000000590 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000007 R13: 0000000000039f1a R14: 000000000000014f R15: badc0ffeebadface INFO: task syz-executor5:1848 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D27496 1848 1 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_log_wait_commit+0x2a5/0x3f0 fs/jbd2/journal.c:730 jbd2_journal_stop+0x8df/0x1280 fs/jbd2/transaction.c:1782 __ext4_journal_stop+0xcd/0x1e0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x779/0xeb0 fs/ext4/namei.c:3046 vfs_unlink2+0x23b/0x470 fs/namei.c:4026 do_unlinkat+0x467/0x650 fs/namei.c:4097 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4573c7 RSP: 002b:00007fff09c959e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004573c7 RDX: 00007fff09c95a00 RSI: 00007fff09c95a90 RDI: 00007fff09c95a90 RBP: 000000000000051a R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 00007fff09c96af0 R13: 0000000000b4c940 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor2:1849 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D27168 1849 1 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_log_wait_commit+0x2a5/0x3f0 fs/jbd2/journal.c:730 jbd2_journal_stop+0x8df/0x1280 fs/jbd2/transaction.c:1782 __ext4_journal_stop+0xcd/0x1e0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x779/0xeb0 fs/ext4/namei.c:3046 vfs_unlink2+0x23b/0x470 fs/namei.c:4026 do_unlinkat+0x467/0x650 fs/namei.c:4097 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4573c7 RSP: 002b:00007ffe29965568 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004573c7 RDX: 00007ffe29965580 RSI: 00007ffe29965610 RDI: 00007ffe29965610 RBP: 0000000000000480 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000006 R11: 0000000000000202 R12: 00007ffe29966670 R13: 00000000022e2940 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor4:1850 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D26824 1850 1 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_log_wait_commit+0x2a5/0x3f0 fs/jbd2/journal.c:730 jbd2_journal_stop+0x8df/0x1280 fs/jbd2/transaction.c:1782 __ext4_journal_stop+0xcd/0x1e0 fs/ext4/ext4_jbd2.c:103 ext4_unlink+0x779/0xeb0 fs/ext4/namei.c:3046 vfs_unlink2+0x23b/0x470 fs/namei.c:4026 do_unlinkat+0x467/0x650 fs/namei.c:4097 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4573c7 RSP: 002b:00007ffca42bbd38 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004573c7 RDX: 00007ffca42bbd50 RSI: 00007ffca42bbde0 RDI: 00007ffca42bbde0 RBP: 00000000000004c5 R08: 0000000000000000 R09: 000000000000000c R10: 0000000000000006 R11: 0000000000000202 R12: 00007ffca42bce40 R13: 0000000000e01940 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor1:13567 blocked for more than 140 seconds. Not tainted 4.14.71+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D29160 13567 1844 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_log_wait_commit+0x2a5/0x3f0 fs/jbd2/journal.c:730 jbd2_journal_stop+0x8df/0x1280 fs/jbd2/transaction.c:1782 __ext4_journal_stop+0xcd/0x1e0 fs/ext4/ext4_jbd2.c:103 ext4_symlink+0x5db/0xaf0 fs/ext4/namei.c:3166 vfs_symlink2+0x321/0x550 fs/namei.c:4161 SYSC_symlinkat fs/namei.c:4194 [inline] SyS_symlinkat+0x110/0x1e0 fs/namei.c:4174 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4573a7 RSP: 002b:00007ffe56c6f1e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000004573a7 RDX: 00007ffe56c6f237 RSI: 00000000004bd168 RDI: 00007ffe56c6f220 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000017 R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000009 R13: 0000000000039df2 R14: 000000000000013b R15: badc0ffeebadface Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 2 locks held by rs:main Q:Reg/1630: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 #1: (sb_writers#4){.+.+}, at: [] file_start_write include/linux/fs.h:2722 [inline] #1: (sb_writers#4){.+.+}, at: [] vfs_write+0x3d7/0x4d0 fs/read_write.c:545 2 locks held by getty/1760: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142 2 locks held by syz-executor0/1845: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xa0 fs/namespace.c:387 #1: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #1: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 2 locks held by syz-executor3/1847: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xa0 fs/namespace.c:387 #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] filename_create+0x15d/0x450 fs/namei.c:3655 3 locks held by syz-executor5/1848: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xa0 fs/namespace.c:387 #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] do_unlinkat+0x273/0x650 fs/namei.c:4083 #2: (&sb->s_type->i_mutex_key#10){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #2: (&sb->s_type->i_mutex_key#10){++++}, at: [] vfs_unlink2+0xc5/0x470 fs/namei.c:4017 3 locks held by syz-executor2/1849: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xa0 fs/namespace.c:387 #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] do_unlinkat+0x273/0x650 fs/namei.c:4083 #2: (&sb->s_type->i_mutex_key#10){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #2: (&sb->s_type->i_mutex_key#10){++++}, at: [] vfs_unlink2+0xc5/0x470 fs/namei.c:4017 3 locks held by syz-executor4/1850: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xa0 fs/namespace.c:387 #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] do_unlinkat+0x273/0x650 fs/namei.c:4083 #2: (&sb->s_type->i_mutex_key#10){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #2: (&sb->s_type->i_mutex_key#10){++++}, at: [] vfs_unlink2+0xc5/0x470 fs/namei.c:4017 1 lock held by syz-executor1/4705: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/4855: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/5508: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/5914: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/5945: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/6355: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/6396: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/7405: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/7427: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/7837: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/7918: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/7991: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/8152: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/8184: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/9181: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/9644: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/9721: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/10068: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/10080: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/10093: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/10505: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/10688: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/10708: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/11263: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/11862: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/12176: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/12544: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/12860: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/12981: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/13013: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/13069: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 1 lock held by syz-executor1/13282: #0: (sb_internal){.+.+}, at: [] sb_start_intwrite include/linux/fs.h:1590 [inline] #0: (sb_internal){.+.+}, at: [] ext4_evict_inode+0x367/0x1520 fs/ext4/inode.c:250 2 locks held by syz-executor1/13567: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write+0x3a/0xa0 fs/namespace.c:387 #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key/1){+.+.}, at: [] filename_create+0x15d/0x450 fs/namei.c:3655 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.71+ #8 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 13555 Comm: syz-executor0 Not tainted 4.14.71+ #8 task: ffff88019fd2c680 task.stack: ffff8801ca9e0000 RIP: 0033:0x401574 RSP: 002b:00007f0b2bcc3690 EFLAGS: 00000282 RAX: 00000000d3dd1ece RBX: 0000000000000007 RCX: 0000000000457679 RDX: 0000000000000000 RSI: 00007f0b2bcc36c0 RDI: 0000000000000007 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d7950 R14: 00000000004c48c6 R15: 0000000000000000 FS: 00007f0b2bcc4700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc2dd60f000 CR3: 00000001d56ca004 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600