Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 313622 pages reserved INFO: task init:9183 blocked for more than 140 seconds. Not tainted 4.9.167+ #36 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D 29304 9183 1 0x00000000 ffff8801d46dbc80 ffff8801db621000 ffff8801ca60af80 ffff8801db621018 ffff8801c6a2f758 ffffffff827ffcae ffff8801950388c8 ffff8801950388a0 00ff8801950388d0 ffff8801db6218f0 1ffff10038d45edaCall Trace: [<00000000bc0fa030>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<000000003edf5cbf>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<000000000d4ce28a>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<000000000d4ce28a>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 [<00000000030b51c8>] chrdev_open+0x230/0x630 fs/char_dev.c:392 [<0000000047bffff8>] do_dentry_open+0x422/0xd20 fs/open.c:772 [<0000000096b1c8a5>] vfs_open+0x105/0x230 fs/open.c:885 [<0000000059ca6079>] do_last fs/namei.c:3457 [inline] [<0000000059ca6079>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<000000008b57adb4>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<00000000ffa86512>] do_sys_open+0x2f0/0x610 fs/open.c:1078 [<000000004a176cda>] SYSC_open fs/open.c:1096 [inline] [<000000004a176cda>] SyS_open+0x2d/0x40 fs/open.c:1091 [<00000000f883c885>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [<000000008f866c4f>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<0000000058466345>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] (rcu_read_lock){......}, at: [<0000000058466345>] watchdog+0x13c/0xae0 kernel/hung_task.c:239 (tasklist_lock){.+.+..}, at: [<000000007ada717b>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4339 #0: (&f->f_pos_lock){+.+.+.}, at: [<000000006d1e7963>] __fdget_pos+0xa8/0xd0 fs/file.c:781 #0: (&tty->ldisc_sem){++++++}, at: [<00000000a9827e68>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 (&ldata->atomic_read_lock){+.+.+.}, at: [<00000000c1138183>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 #0: (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 #0: (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 #0: (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 #0: (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 #0: (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 #0: (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open_by_driver drivers/tty/tty_io.c:2060 [inline] (tty_mutex){+.+.+.}, at: [<000000009e9c7885>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2138 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.167+ #36 ffff8801d98d7cc8 ffffffff81b4f011 0000000000000001 0000000000000000 0000000000000001 ffffffff81097401 dffffc0000000000 ffff8801d98d7d00 ffffffff81b5a2cc 0000000000000001 0000000000000000 0000000000000001Call Trace: [<000000005fbf833f>] __dump_stack lib/dump_stack.c:15 [inline] [<000000005fbf833f>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000b3da2183>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<000000006e144349>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000052875be>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<00000000d5bf3e66>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<00000000d5bf3e66>] check_hung_task kernel/hung_task.c:125 [inline] [<00000000d5bf3e66>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [<00000000d5bf3e66>] watchdog+0x661/0xae0 kernel/hung_task.c:239 [<00000000634f23ee>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000efe527d6>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4572 Comm: syz-executor626 Not tainted 4.9.167+ #36 task: 0000000011595520 task.stack: 00000000091047be RIP: 0010:[] c [<00000000f2a044f1>] hash_futex+0x1/0x210 kernel/futex.c:392 RSP: 0018:ffff8801800efac8 EFLAGS: 00000293 RAX: ffff8801ad998000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8129d510 RDI: ffff8801800efb50 RBP: ffff8801800efbd8 R08: 0000000000000000 R09: 0000000000000000 R10: 1ffff1003001dff9 R11: 0000000000000000 R12: 00000000006dbc28 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000ffffffff FS: 0000000001d98880(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004b4fa0 CR3: 000000018e1ff000 CR4: 00000000001606b0 Stack: ffff8801800efbd8c ffffffff8129d51cc 0000000000000000c 0000000000000000c 00000000ffffffffc 004468d900000000c 1ffff1003001df62c 00000000ffffffffc ffff8801d9c46bc0c 0000000041b58ab3c ffffffff82e2ca80c ffffffff8129d410c Call Trace: [<0000000044bc775c>] do_futex+0x2bf/0x1a70 kernel/futex.c:3281 [<0000000033d9f767>] SYSC_futex kernel/futex.c:3337 [inline] [<0000000033d9f767>] SyS_futex+0x253/0x360 kernel/futex.c:3305 [<00000000f883c885>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [<000000008f866c4f>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c48 c83 cfb c20 c0f c85 c59 cff cff cff ce8 c2b c3d c08 c00 c31 cc0 c48 c83 cc4 c08 c5b c41 c5c c41 c5d c41 c5e c41 c5f c5d cc3 ce8 c05 cf8 c25 c00 ce9 c73 cff cff cff c55 c<48> c89 ce5 c41 c56 c41 c55 c41 c54 c53 c48 c89 cfb c48 c83 cec c10 ce8 cf9 c3c c08 c