[29035] 0 29035 17618 12709 31 3 0 1000 syz-executor4 [29081] 0 29081 17585 8381 25 4 0 0 syz-executor0 Out of memory: Kill process 28992 (syz-executor4) score 1010 or sacrifice child Killed process 29035 (syz-executor4) total-vm:70472kB, anon-rss:18068kB, file-rss:32768kB, shmem-rss:0kB oom_reaper: reaped process 29035 (syz-executor4), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB INFO: task init:24823 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 24823 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: 0033:0x7fd2a485f120 RSP: 002b:00007ffd92bcd9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000002489010 RCX: 00007fd2a485f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffd92bcdb70 R15: 0000000002489018 INFO: task init:24824 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 24824 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: 0033:0x7fd2a485f120 RSP: 002b:00007ffd92bcd9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000024890e0 RCX: 00007fd2a485f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffd92bcdb70 R15: 00000000024890e8 INFO: task init:24825 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 24825 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: 0033:0x7fd2a485f120 RSP: 002b:00007ffd92bcd9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000024891b0 RCX: 00007fd2a485f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffd92bcdb70 R15: 00000000024891b8 INFO: task init:24826 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 24826 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: 0033:0x7fd2a485f120 RSP: 002b:00007ffd92bcd9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000002489280 RCX: 00007fd2a485f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffd92bcdb70 R15: 0000000002489288 INFO: task init:24896 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 24896 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: 0033:0x7fd2a485f120 RSP: 002b:00007ffd92bcd9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000002489350 RCX: 00007fd2a485f120 RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8 RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902 R13: 0000000000000102 R14: 00007ffd92bcdb70 R15: 0000000002489358 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/1637: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1765: #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-executor5/1850: #0: (tasklist_lock){.+.+}, at: [] do_wait+0x379/0x920 kernel/exit.c:1519 1 lock held by init/24823: #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/24824: #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/24825: #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/24826: #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/24896: #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-executor4/29107: #0: (&mm->mmap_sem){++++}, at: [] vm_mmap_pgoff+0x14f/0x1d0 mm/util.c:331 2 locks held by syz-executor2/29170: #0: (sb_writers#4){.+.+}, at: [] sb_start_write include/linux/fs.h:1545 [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:715 [inline] #1: (&sb->s_type->i_mutex_key#9){++++}, at: [] do_truncate2+0xfd/0x1c0 fs/open.c:61 ============================================= NMI backtrace for cpu 1 CPU: 1 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 29153 Comm: syz-executor4 Not tainted 4.14.87+ #21 task: ffff8881c4ec8000 task.stack: ffff888170c80000 RIP: 0010:apic_timer_interrupt+0x0/0x90 RSP: 0018:ffff888170c87978 EFLAGS: 00000002 RAX: 0000000000000001 RBX: ffffea00071f9840 RCX: 1ffff110389d9104 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000246 RBP: ffffea00071f9840 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8881c4ec8858 R11: 0000000000000001 R12: dead000000000100 R13: fffff94000e3f30c R14: dffffc0000000000 R15: ffffea00071f9860 FS: 00007fb907c1a700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000440080 CR3: 00000001968a8003 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 RSP: 0018:ffff888170c879a8 EFLAGS: 00000202 putback_lru_page+0x1e9/0x360 mm/vmscan.c:809 munlock_vma_page+0x2ad/0x350 mm/mlock.c:204 wp_page_copy+0x109e/0x13e0 mm/memory.c:2590 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: 0033:0x457679 RSP: 002b:00007fb907c19c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457679 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb907c1a6d4 R13: 00000000004c2d55 R14: 00000000004d5080 R15: 00000000ffffffff Code: 08 60 fe 48 89 e7 e8 60 3b 60 fe e8 14 08 60 fe e9 44 f0 ff ff 66 0f 1f 44 00 00 4c 87 c1 e9 e8 3e 6d fe c3 90 90 90 90 90 90 90 <68> 10 ff ff ff fc f6 44 24 10 03 74 0b 0f 01 f8 0f 1f 00 e8 d8