[27882] 0 27882 17651 12772 31 3 0 1000 syz-executor2 [27884] 0 27884 17585 8182 25 4 0 1000 syz-executor0 Out of memory: Kill process 27866 (syz-executor2) score 1010 or sacrifice child Killed process 27882 (syz-executor2) total-vm:70604kB, anon-rss:18320kB, file-rss:32768kB, shmem-rss:0kB oom_reaper: reaped process 27882 (syz-executor2), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB INFO: task init:25091 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28744 25091 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: 0033:0x7f70084f2120 RSP: 002b:00007ffe6ef645e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006ca010 RCX: 00007f70084f2120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffe6ef64760 R15: 00000000006ca018 INFO: task init:25092 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29040 25092 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: 0033:0x7f70084f2120 RSP: 002b:00007ffe6ef645e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006ca0e0 RCX: 00007f70084f2120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffe6ef64760 R15: 00000000006ca0e8 INFO: task init:25093 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28520 25093 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: 0033:0x7f70084f2120 RSP: 002b:00007ffe6ef645e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006ca1b0 RCX: 00007f70084f2120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffe6ef64760 R15: 00000000006ca1b8 INFO: task init:25094 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28056 25094 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: 0033:0x7f70084f2120 RSP: 002b:00007ffe6ef645e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006ca280 RCX: 00007f70084f2120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffe6ef64760 R15: 00000000006ca288 INFO: task init:25095 blocked for more than 140 seconds. Not tainted 4.14.87+ #19 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D28520 25095 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: 0033:0x7f70084f2120 RSP: 002b:00007ffe6ef645e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006ca350 RCX: 00007f70084f2120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffe6ef64760 R15: 00000000006ca358 Showing all locks held in the system: 2 locks held by kworker/1:0/18: #0: ("events"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&rew.rew_work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 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/1629: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1757: #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 1 lock held by init/25091: #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/25092: #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/25093: #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/25094: #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/25095: #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 syz-executor2/27866: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x868/0xb60 arch/x86/mm/fault.c:1361 1 lock held by syz-executor2/27868: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 1 lock held by syz-executor3/27875: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x868/0xb60 arch/x86/mm/fault.c:1361 2 locks held by syz-executor3/27886: #0: (&dup_mmap_sem){.+.+}, at: [] dup_mmap kernel/fork.c:609 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] dup_mm kernel/fork.c:1202 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] copy_mm kernel/fork.c:1256 [inline] #0: (&dup_mmap_sem){.+.+}, at: [] copy_process.part.6+0x3989/0x6530 kernel/fork.c:1762 #1: (&mm->mmap_sem){++++}, at: [] dup_mmap kernel/fork.c:610 [inline] #1: (&mm->mmap_sem){++++}, at: [] dup_mm kernel/fork.c:1202 [inline] #1: (&mm->mmap_sem){++++}, at: [] copy_mm kernel/fork.c:1256 [inline] #1: (&mm->mmap_sem){++++}, at: [] copy_process.part.6+0x39a5/0x6530 kernel/fork.c:1762 1 lock held by syz-executor5/27889: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 2 locks held by syz-executor1/27894: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x14f/0x430 net/core/net_namespace.c:409 #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline] #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x306/0x850 kernel/rcu/tree_exp.h:596 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.87+ #19 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: 11704 Comm: syz-executor5 Not tainted 4.14.87+ #19 task: ffff88819c4caf00 task.stack: ffff8881d1e00000 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:97 RSP: 0018:ffff8881d1e07b50 EFLAGS: 00000046 RAX: ffffffff9a89bbd0 RBX: ffffffff9caac880 RCX: 0000000000000020 RDX: 1ffffffff395592d RSI: 000000000000fff7 RDI: 0000000000000380 RBP: 000000000000fff7 R08: 000000000000000a R09: 0000000008c995f3 R10: ffffed1043fffe09 R11: 0000010b4771dce2 R12: 0000000000000001 R13: 0000000000000003 R14: 0000000000000000 R15: ffff8881d7724a80 FS: 0000000002986940(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000072bfac CR3: 00000001c7204001 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:395 [inline] lapic_next_event+0x5c/0x90 arch/x86/kernel/apic/apic.c:469 clockevents_program_event+0x1fc/0x2d0 kernel/time/clockevents.c:339 tick_program_event+0x76/0xc0 kernel/time/tick-oneshot.c:47 hrtimer_reprogram kernel/time/hrtimer.c:665 [inline] hrtimer_start_range_ns+0xd2c/0x1070 kernel/time/hrtimer.c:995 hrtimer_start_expires include/linux/hrtimer.h:391 [inline] do_nanosleep+0x1a2/0x630 kernel/time/hrtimer.c:1516 hrtimer_nanosleep+0x1ea/0x470 kernel/time/hrtimer.c:1573 SYSC_nanosleep kernel/time/hrtimer.c:1605 [inline] SyS_nanosleep+0x127/0x190 kernel/time/hrtimer.c:1592 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x483150 RSP: 002b:00007fff57091c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 00000000001176bb RCX: 0000000000483150 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff57091c50 RBP: 000000000000099d R08: 0000000000000001 R09: 0000000002986940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 000000000011763b R14: 0000000000000238 R15: 0000000000000005 Code: d2 75 13 83 3d 29 69 d7 02 01 77 02 5b c3 89 df 5b e9 7a e5 fe ff e8 a8 2d 49 00 eb e6 66 0f 1f 44 00 00 89 ff 89 b7 00 d0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb