[10429] 0 10429 95 1 4 3 0 0 modprobe [10431] 0 10431 97 1 6 3 0 0 modprobe Out of memory: Kill process 10235 (syz-executor2) score 1007 or sacrifice child Killed process 10235 (syz-executor2) total-vm:70472kB, anon-rss:18068kB, file-rss:32768kB, shmem-rss:0kB oom_reaper: reaped process 10235 (syz-executor2), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB INFO: task init:5322 blocked for more than 140 seconds. Not tainted 4.14.87+ #21 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28744 5322 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3455 [inline] path_openat+0x5f9/0x2930 fs/namei.c:3597 do_filp_open+0x197/0x270 fs/namei.c:3631 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: 0033:0x7f642b65f120 RSP: 002b:00007fff2c8e4d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000000000125b010 RCX: 00007f642b65f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fff2c8e4eb0 R15: 000000000125b018 INFO: task init:5323 blocked for more than 140 seconds. Not tainted 4.14.87+ #21 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29352 5323 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3455 [inline] path_openat+0x5f9/0x2930 fs/namei.c:3597 do_filp_open+0x197/0x270 fs/namei.c:3631 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: 0033:0x7f642b65f120 RSP: 002b:00007fff2c8e4d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000000000125b0e0 RCX: 00007f642b65f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fff2c8e4eb0 R15: 000000000125b0e8 INFO: task init:5324 blocked for more than 140 seconds. Not tainted 4.14.87+ #21 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28520 5324 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3455 [inline] path_openat+0x5f9/0x2930 fs/namei.c:3597 do_filp_open+0x197/0x270 fs/namei.c:3631 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: 0033:0x7f642b65f120 RSP: 002b:00007fff2c8e4d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000000000125b1b0 RCX: 00007f642b65f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fff2c8e4eb0 R15: 000000000125b1b8 INFO: task init:5325 blocked for more than 140 seconds. Not tainted 4.14.87+ #21 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28056 5325 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3455 [inline] path_openat+0x5f9/0x2930 fs/namei.c:3597 do_filp_open+0x197/0x270 fs/namei.c:3631 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: 0033:0x7f642b65f120 RSP: 002b:00007fff2c8e4d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000000000125b280 RCX: 00007f642b65f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fff2c8e4eb0 R15: 000000000125b288 INFO: task init:5366 blocked for more than 140 seconds. Not tainted 4.14.87+ #21 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29352 5366 1 0x00000000 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 chrdev_open+0x20d/0x570 fs/char_dev.c:417 do_dentry_open+0x426/0xda0 fs/open.c:764 vfs_open+0x11c/0x210 fs/open.c:878 do_last fs/namei.c:3455 [inline] path_openat+0x5f9/0x2930 fs/namei.c:3597 do_filp_open+0x197/0x270 fs/namei.c:3631 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: 0033:0x7f642b65f120 RSP: 002b:00007fff2c8e4d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000000000125b350 RCX: 00007f642b65f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007fff2c8e4eb0 R15: 000000000125b358 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 1 lock held by rsyslogd/1632: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 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/0x1700 drivers/tty/n_tty.c:2156 2 locks held by syz-fuzzer/1781: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 2 locks held by syz-fuzzer/1795: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 1 lock held by syz-executor4/1848: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x35/0x3d0 net/netfilter/x_tables.c:1092 2 locks held by kworker/u4:5/2209: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 1 lock held by init/5322: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/5323: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/5324: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/5325: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 1 lock held by init/5366: #0: (tty_mutex){+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline] #0: (tty_mutex){+.+.}, at: [] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.87+ #21 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:140 [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: 10461 Comm: syz-executor3 Not tainted 4.14.87+ #21 task: ffff8881a1c9de00 task.stack: ffff88808e088000 RIP: 0010:trace_hardirqs_on_caller+0x18a/0x520 kernel/locking/lockdep.c:2915 RSP: 0018:ffff88808e08f730 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 1ffff11034393cc4 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff92436fc8 RBP: ffffffff9146a174 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11011c11eee R13: ffffffff920d3180 R14: ffff8881c7956d18 R15: 0000000000000001 FS: 00007f4ae1b47700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001c880b8 CR3: 000000011ba26004 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x54/0x70 kernel/locking/spinlock.c:192 debug_object_activate+0x1fd/0x4e0 lib/debugobjects.c:465 debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline] __call_rcu.constprop.46+0x32/0x650 kernel/rcu/tree.c:3042 sock_destroy_inode+0x40/0x60 net/socket.c:280 destroy_inode+0xbc/0x110 fs/inode.c:266 iput_final fs/inode.c:1516 [inline] iput+0x373/0x8e0 fs/inode.c:1543 dentry_unlink_inode+0x25c/0x310 fs/dcache.c:387 __dentry_kill+0x31b/0x590 fs/dcache.c:591 dentry_kill fs/dcache.c:632 [inline] dput.part.6+0x573/0x710 fs/dcache.c:847 dput+0x1b/0x30 fs/dcache.c:811 __fput+0x42c/0x6f0 fs/file_table.c:228 task_work_run+0x116/0x190 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x8fb/0x28c0 kernel/exit.c:865 do_group_exit+0x100/0x2e0 kernel/exit.c:968 get_signal+0x4e5/0x1470 kernel/signal.c:2348 do_signal+0x8f/0x1660 arch/x86/kernel/signal.c:809 exit_to_usermode_loop+0x116/0x150 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x35d/0x4b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457679 RSP: 002b:00007f4ae1b46c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000000040 RBX: 0000000000000003 RCX: 0000000000457679 RDX: 0000000000000800 RSI: 0000000020000080 RDI: 000000000000000f RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4ae1b476d4 R13: 00000000004c4499 R14: 00000000004d7468 R15: 00000000ffffffff Code: 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 a4 02 00 00 80 3d ae a4 63 02 00 <0f> 85 15 03 00 00 65 48 8b 1c 25 c0 de 01 00 48 8d bb fc 07 00