INFO: task init:1 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D24648 1 0 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 wait_transaction_locked+0x1a1/0x220 fs/jbd2/transaction.c:164 add_transaction_credits+0x403/0x970 fs/jbd2/transaction.c:192 start_this_handle+0x368/0xfc0 fs/jbd2/transaction.c:362 jbd2__journal_start+0x30a/0x8b0 fs/jbd2/transaction.c:444 __ext4_journal_start_sb+0x109/0x460 fs/ext4/ext4_jbd2.c:81 __ext4_journal_start fs/ext4/ext4_jbd2.h:314 [inline] ext4_da_write_begin+0x476/0x1050 fs/ext4/inode.c:3079 generic_perform_write+0x203/0x430 mm/filemap.c:3037 __generic_file_write_iter+0x345/0x540 mm/filemap.c:3162 ext4_file_write_iter+0x4f6/0xe20 fs/ext4/file.c:264 call_write_iter include/linux/fs.h:1782 [inline] new_sync_write fs/read_write.c:471 [inline] __vfs_write+0x417/0x5c0 fs/read_write.c:484 vfs_write+0x17f/0x4d0 fs/read_write.c:546 SYSC_write fs/read_write.c:593 [inline] SyS_write+0xc2/0x1a0 fs/read_write.c:585 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f360a594370 RSP: 002b:00007ffc83be8e48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f360a594370 RDX: 0000000000000180 RSI: 00007ffc83be91a0 RDI: 0000000000000001 RBP: 0000000000000001 R08: 00007ffc83be8fa0 R09: 0000000080000000 R10: 0000000000000008 R11: 0000000000000246 R12: 00000000ffffffff R13: 00007ffc83be91a0 R14: 000000000001b180 R15: 00007ffc83be8e60 INFO: task kworker/u4:0:5 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:0 D26168 5 2 0x80000000 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 wait_transaction_locked+0x1a1/0x220 fs/jbd2/transaction.c:164 add_transaction_credits+0x403/0x970 fs/jbd2/transaction.c:192 start_this_handle+0x368/0xfc0 fs/jbd2/transaction.c:362 jbd2__journal_start+0x30a/0x8b0 fs/jbd2/transaction.c:444 __ext4_journal_start_sb+0x109/0x460 fs/ext4/ext4_jbd2.c:81 __ext4_journal_start fs/ext4/ext4_jbd2.h:314 [inline] ext4_writepages+0x105e/0x3040 fs/ext4/inode.c:2867 do_writepages+0xe0/0x270 mm/page-writeback.c:2341 __writeback_single_inode+0xd8/0x1020 fs/fs-writeback.c:1320 writeback_sb_inodes+0x468/0xcd0 fs/fs-writeback.c:1584 __writeback_inodes_wb+0xf8/0x1e0 fs/fs-writeback.c:1653 wb_writeback+0x4ee/0xb90 fs/fs-writeback.c:1762 wb_check_old_data_flush fs/fs-writeback.c:1875 [inline] wb_do_writeback fs/fs-writeback.c:1899 [inline] wb_workfn+0x85d/0xe00 fs/fs-writeback.c:1928 process_one_work+0x86e/0x15c0 kernel/workqueue.c:2114 worker_thread+0xdc/0x1000 kernel/workqueue.c:2248 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task jbd2/sda1-8:75 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. jbd2/sda1-8 D27240 75 2 0x80000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 jbd2_journal_commit_transaction+0x724/0x648c fs/jbd2/commit.c:437 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-executor4:20339 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D29592 20339 1850 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline] rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:713 [inline] do_truncate2+0xfd/0x1c0 fs/open.c:61 handle_truncate fs/namei.c:2998 [inline] do_last fs/namei.c:3417 [inline] path_openat+0xaea/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f9a78f8fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457579 RDX: 000000000000275a RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a78f906d4 R13: 00000000004c2b26 R14: 00000000004d4140 R15: 00000000ffffffff INFO: task syz-executor4:20389 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D29592 20389 1850 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline] rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:713 [inline] do_truncate2+0xfd/0x1c0 fs/open.c:61 handle_truncate fs/namei.c:2998 [inline] do_last fs/namei.c:3417 [inline] path_openat+0xaea/0x23a0 fs/namei.c:3550 do_filp_open+0x197/0x270 fs/namei.c:3584 do_sys_open+0x2ef/0x580 fs/open.c:1071 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f9a78f6ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a78f6f6d4 R13: 00000000004bdb43 R14: 00000000004cc688 R15: 00000000ffffffff INFO: task syz-executor4:20390 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D30440 20390 1850 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline] rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:713 [inline] ext4_fallocate+0x359/0x1c80 fs/ext4/extents.c:4965 vfs_fallocate+0x346/0x700 fs/open.c:328 SYSC_fallocate fs/open.c:351 [inline] SyS_fallocate+0x4b/0x80 fs/open.c:345 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f9a78f4dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457579 RDX: 0000000001000040 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000fff R11: 0000000000000246 R12: 00007f9a78f4e6d4 R13: 00000000004bdc1c R14: 00000000004cc868 R15: 00000000ffffffff INFO: task syz-executor4:20393 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D30536 20393 1850 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline] rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:713 [inline] ext4_fallocate+0x359/0x1c80 fs/ext4/extents.c:4965 vfs_fallocate+0x346/0x700 fs/open.c:328 SYSC_fallocate fs/open.c:351 [inline] SyS_fallocate+0x4b/0x80 fs/open.c:345 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f9a78f2cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457579 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000072c180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000010001 R11: 0000000000000246 R12: 00007f9a78f2d6d4 R13: 00000000004bdc1c R14: 00000000004cc868 R15: 00000000ffffffff INFO: task syz-executor4:20394 blocked for more than 140 seconds. Not tainted 4.14.74+ #17 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D28920 20394 1850 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline] rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 inode_lock include/linux/fs.h:713 [inline] lock_two_nondirectories+0xca/0xf0 fs/inode.c:982 ext4_move_extents+0x4cf/0x2a10 fs/ext4/move_extent.c:609 ext4_ioctl+0x275c/0x35e0 fs/ext4/ioctl.c:765 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f9a78f0bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003 RBP: 000000000072c220 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a78f0c6d4 R13: 00000000004bf5dd R14: 00000000004cf460 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by init/1: #0: (sb_writers#4){.+.+}, at: [] file_start_write include/linux/fs.h:2722 [inline] #0: (sb_writers#4){.+.+}, at: [] vfs_write+0x3d7/0x4d0 fs/read_write.c:545 #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_trylock include/linux/fs.h:733 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_file_write_iter+0x1b9/0xe20 fs/ext4/file.c:230 4 locks held by kworker/u4:0/5: #0: ("writeback"){+.+.}, at: [] process_one_work+0x787/0x15c0 kernel/workqueue.c:2085 #1: ((&(&wb->dwork)->work)){+.+.}, at: [] process_one_work+0x7bf/0x15c0 kernel/workqueue.c:2089 #2: (&type->s_umount_key#34){++++}, at: [] trylock_super+0x1a/0xe0 fs/super.c:402 #3: (&sbi->s_journal_flag_rwsem){++++}, at: [] do_writepages+0xe0/0x270 mm/page-writeback.c:2341 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 3 locks held by rs:main Q:Reg/1628: #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: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_trylock include/linux/fs.h:733 [inline] #2: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_file_write_iter+0x1b9/0xe20 fs/ext4/file.c:230 2 locks held by getty/1758: #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 1 lock held by syz-executor4/5566: #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-executor4/5601: #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-executor4/5666: #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-executor4/6180: #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-executor4/6975: #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-executor4/7038: #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-executor4/7172: #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-executor4/7407: #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-executor4/9103: #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-executor4/9392: #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-executor4/9723: #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-executor4/10000: #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-executor4/11149: #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-executor4/11832: #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-executor4/12266: #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-executor4/13283: #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-executor4/13721: #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-executor4/14092: #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-executor4/15671: #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-executor4/16530: #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-executor4/16833: #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-executor4/17795: #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-executor4/18051: #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-executor4/18913: #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-executor4/18959: #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-executor4/19415: #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-executor4/19989: #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-executor4/20080: #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-executor4/20256: #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-executor4/20339: #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->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] do_truncate2+0xfd/0x1c0 fs/open.c:61 2 locks held by syz-executor4/20389: #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->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] do_truncate2+0xfd/0x1c0 fs/open.c:61 2 locks held by syz-executor4/20390: #0: (sb_writers#4){.+.+}, at: [] file_start_write include/linux/fs.h:2722 [inline] #0: (sb_writers#4){.+.+}, at: [] vfs_fallocate+0x4dd/0x700 fs/open.c:327 #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_fallocate+0x359/0x1c80 fs/ext4/extents.c:4965 2 locks held by syz-executor4/20393: #0: (sb_writers#4){.+.+}, at: [] file_start_write include/linux/fs.h:2722 [inline] #0: (sb_writers#4){.+.+}, at: [] vfs_fallocate+0x4dd/0x700 fs/open.c:327 #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] ext4_fallocate+0x359/0x1c80 fs/ext4/extents.c:4965 2 locks held by syz-executor4/20394: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1543 [inline] #0: (sb_writers#4){.+.+}, at: [] mnt_want_write_file+0xfa/0x300 fs/namespace.c:498 #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] inode_lock include/linux/fs.h:713 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] lock_two_nondirectories+0xca/0xf0 fs/inode.c:982 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.74+ #17 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 20333 Comm: syz-executor4 Not tainted 4.14.74+ #17 task: ffff8801cd9c1780 task.stack: ffff8801c99f0000 RIP: 0010:mext_check_coverage.constprop.2+0x1b0/0x3c0 fs/ext4/move_extent.c:109 RSP: 0018:ffff8801c99f76e8 EFLAGS: 00000246 RAX: ffff8801d432fa00 RBX: ffff8801d432fa00 RCX: 1ffff1003a865f42 RDX: dffffc0000000000 RSI: ffffc90005561000 RDI: ffff8801d432fa10 RBP: 00000000e8cdfd2c R08: 000000009b0623de R09: 0000000000000000 R10: ffff8801cd9c20a0 R11: 0000000000000001 R12: ffff8801c99f78f8 R13: ffff8801c3bdc2b0 R14: ffff8801c3bdc0c0 R15: 0000000000008002 FS: 00007f9a78fb1700(0000) GS:ffff8801dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000008d51f8 CR3: 00000001d4b74001 CR4: 00000000001606a0 Call Trace: move_extent_per_page fs/ext4/move_extent.c:333 [inline] ext4_move_extents+0x17dc/0x2a10 fs/ext4/move_extent.c:681 ext4_ioctl+0x275c/0x35e0 fs/ext4/ioctl.c:765 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1a0/0x1030 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7e/0xb0 fs/ioctl.c:692 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457579 RSP: 002b:00007f9a78fb0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a78fb16d4 R13: 00000000004bf5dd R14: 00000000004cf460 R15: 00000000ffffffff Code: 0f b7 85 16 fe ff ff 48 ba 00 00 00 00 00 fc ff df 48 8d 04 40 48 c1 e0 04 48 01 d8 48 8d 78 10 48 89 f9 48 c1 e9 03 80 3c 11 00 <0f> 85 a9 01 00 00 4c 8b 78 10 48 b8 00 00 00 00 00 fc ff df 49