[24984] 0 24984 17651 8430 25 4 0 0 syz-executor4 [24985] 0 24985 17651 8430 25 4 0 0 syz-executor4 Out of memory: Kill process 3951 (syz-executor2) score 1007 or sacrifice child Killed process 3951 (syz-executor2) total-vm:70472kB, anon-rss:18068kB, file-rss:32768kB, shmem-rss:0kB oom_reaper: reaped process 3951 (syz-executor2), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB INFO: task init:21739 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 D29352 21739 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: 0033:0x7ff854870120 RSP: 002b:00007ffc406e9de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000001e39f40 RCX: 00007ff854870120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffc406e9f60 R15: 0000000001e39f48 INFO: task init:21741 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 21741 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: 0033:0x7ff854870120 RSP: 002b:00007ffc406e9de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000001e3a010 RCX: 00007ff854870120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffc406e9f60 R15: 0000000001e3a018 INFO: task init:21966 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 D29352 21966 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: 0033:0x7ff854870120 RSP: 002b:00007ffc406e9de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000001e3a0e0 RCX: 00007ff854870120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffc406e9f60 R15: 0000000001e3a0e8 INFO: task init:21967 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 D27256 21967 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: 0033:0x7ff854870120 RSP: 002b:00007ffc406e9de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000001e3a1b0 RCX: 00007ff854870120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffc406e9f60 R15: 0000000001e3a1b8 INFO: task init:21968 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 D29352 21968 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: 0033:0x7ff854870120 RSP: 002b:00007ffc406e9de8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000001e3a280 RCX: 00007ff854870120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffc406e9f60 R15: 0000000001e3a288 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/1627: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1755: #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-executor0/28092: #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 syz-executor4/13065: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x4e/0x110 fs/exec.c:1389 1 lock held by init/21739: #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/21741: #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/21966: #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/21967: #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/21968: #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-executor2/25002: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x868/0xb60 arch/x86/mm/fault.c:1361 1 lock held by syz-executor2/25060: #0: (&mm->mmap_sem){++++}, at: [] SYSC_mlockall mm/mlock.c:807 [inline] #0: (&mm->mmap_sem){++++}, at: [] SyS_mlockall+0x273/0x510 mm/mlock.c:790 1 lock held by syz-executor3/25013: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 1 lock held by syz-executor0/25015: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 ============================================= NMI backtrace for cpu 1 CPU: 1 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 25056 Comm: syz-executor3 Not tainted 4.14.87+ #19 task: ffff888123842f00 task.stack: ffff888123b80000 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0xb/0x50 kernel/rcu/update.c:297 RSP: 0018:ffff8881db807d20 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 0000000000000046 RCX: ffffffff9e992187 RDX: 0000000000000004 RSI: 1ffffffff4015884 RDI: ffffffffa0411480 RBP: ffffffffa18ef400 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f15c8bb4700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000431540 CR3: 0000000123af2003 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x187/0x380 kernel/locking/lockdep.c:3990 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x41/0x50 kernel/locking/spinlock.c:160 debug_object_deactivate+0xf7/0x340 lib/debugobjects.c:503 debug_hrtimer_deactivate kernel/time/hrtimer.c:406 [inline] debug_deactivate kernel/time/hrtimer.c:453 [inline] __run_hrtimer kernel/time/hrtimer.c:1229 [inline] __hrtimer_run_queues+0x1d3/0xc10 kernel/time/hrtimer.c:1323 hrtimer_interrupt+0x19a/0x440 kernel/time/hrtimer.c:1357 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] smp_apic_timer_interrupt+0x13a/0x600 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0x84/0x90 arch/x86/entry/entry_64.S:787 RIP: 0010:copy_page+0x7/0x10 arch/x86/lib/copy_page_64.S:18 RSP: 0018:ffff888123b87a20 EFLAGS: 00010286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff4051ac0 RBX: ffff888123b87c58 RCX: 000000000000012c RDX: dffffc0000000000 RSI: ffff88812404f6a0 RDI: ffff888124a2f6a0 RBP: ffffea0004928bc0 R08: 0000000000000000 R09: ffffed1024945e00 R10: 0000000000000000 R11: ffffea0004928bc0 R12: ffffea00049013c0 R13: ffff8881a5e521f0 R14: ffff88812404f000 R15: 0000000124a2f000 copy_user_page arch/x86/include/asm/page.h:34 [inline] copy_user_highpage include/linux/highmem.h:233 [inline] cow_user_page mm/memory.c:2346 [inline] wp_page_copy+0x2d7/0x13e0 mm/memory.c:2500 do_wp_page+0x24c/0x1880 mm/memory.c:2778 handle_pte_fault mm/memory.c:3976 [inline] __handle_mm_fault+0xdc7/0x25f0 mm/memory.c:4084 handle_mm_fault+0x3d5/0x6eb mm/memory.c:4121 faultin_page mm/gup.c:502 [inline] __get_user_pages+0x35d/0xe20 mm/gup.c:702 populate_vma_page_range+0x17a/0x210 mm/gup.c:1219 __mm_populate+0x1bf/0x300 mm/gup.c:1267 mm_populate include/linux/mm.h:2176 [inline] SYSC_mlockall mm/mlock.c:816 [inline] SyS_mlockall+0x3e2/0x510 mm/mlock.c:790 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457659 RSP: 002b:00007f15c8bb3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457659 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000080000000003 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f15c8bb46d4 R13: 00000000004c2d35 R14: 00000000004d5060 R15: 00000000ffffffff Code: ff ff 48 8b 3c 24 e8 25 d3 2e 00 e9 4f fd ff ff 4c 89 f7 e8 18 d3 2e 00 e9 a5 fd ff ff 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 53 <65> 48 8b 1c 25 c0 de 01 00 48 8d bb 2c 08 00 00 48 89 fa 48 c1