tmpfs: No value for mount option '¤KË‰f¹ÜÆ¶_x£ØÔsV¤ËåŽÌÚÍ·W' tmpfs: No value for mount option '¤KË‰f¹ÜÆ¶_x£ØÔsV¤ËåŽÌÚÍ·W' INFO: task syz-executor7:14934 blocked for more than 140 seconds. Not tainted 4.9.120-gf85543b #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D28104 14934 3871 0x00000004 ffff8801cff01800 0000000000000000 ffff8801ccecf9c0 ffff8801cf4c4800 ffff8801db321c18 ffff8801b73273e0 ffffffff839eedcd ffffffff855bc6f0 ffff8801cff02130 0000000000004626 00ff8801cff020e0 ffff8801db3224e8 Call Trace: [] schedule+0x7f/0x1b0 kernel/sched/core.c:3553 [] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768 [] do_wait_for_common kernel/sched/completion.c:75 [inline] [] __wait_for_common kernel/sched/completion.c:93 [inline] [] wait_for_common kernel/sched/completion.c:101 [inline] [] wait_for_completion+0x203/0x2e0 kernel/sched/completion.c:122 [] flush_work+0x3a4/0x6c0 kernel/workqueue.c:2846 [] __cancel_work_timer+0x17e/0x440 kernel/workqueue.c:2912 [] cancel_work_sync+0x17/0x20 kernel/workqueue.c:2947 [] p9_conn_destroy net/9p/trans_fd.c:857 [inline] [] p9_fd_close+0x1f1/0x330 net/9p/trans_fd.c:883 [] p9_client_create+0x825/0x10a0 net/9p/client.c:1050 [] v9fs_session_init+0x333/0x13a0 fs/9p/v9fs.c:343 [] v9fs_mount+0x7d/0x810 fs/9p/vfs_super.c:130 [] mount_fs+0x28c/0x370 fs/super.c:1206 [] vfs_kern_mount.part.29+0xd1/0x3d0 fs/namespace.c:1000 [] vfs_kern_mount fs/namespace.c:982 [inline] [] do_new_mount fs/namespace.c:2537 [inline] [] do_mount+0x3c9/0x2740 fs/namespace.c:2859 [] SYSC_mount fs/namespace.c:3075 [inline] [] SyS_mount+0xfe/0x110 fs/namespace.c:3052 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/519: #0: (rcu_read_lock){......}, at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 kernel/hung_task.c:239 #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336 2 locks held by kworker/1:2/1709: #0: ("events"){.+.+.+}, at: [] work_static include/linux/workqueue.h:186 [inline] #0: ("events"){.+.+.+}, at: [] set_work_data kernel/workqueue.c:617 [inline] #0: ("events"){.+.+.+}, at: [] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ("events"){.+.+.+}, at: [] process_one_work+0x6ee/0x1500 kernel/workqueue.c:2085 #1: ((&m->wq)){+.+.+.}, at: [] process_one_work+0x728/0x1500 kernel/workqueue.c:2089 1 lock held by rsyslogd/3675: #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0xac/0xd0 fs/file.c:781 2 locks held by getty/3772: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142 1 lock held by init/14963: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/14964: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/14966: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/14967: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 1 lock held by init/14968: #0: (tty_mutex){+.+.+.}, at: [] tty_open_by_driver drivers/tty/tty_io.c:2047 [inline] #0: (tty_mutex){+.+.+.}, at: [] tty_open+0x46c/0xe20 drivers/tty/tty_io.c:2125 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 519 Comm: khungtaskd Not tainted 4.9.120-gf85543b #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d8517d08 ffffffff81eb8049 0000000000000000 0000000000000001 0000000000000001 0000000000000001 ffffffff810b9fa0 ffff8801d8517d40 ffffffff81ec3357 0000000000000001 0000000000000000 0000000000000003 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99 [] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60 [] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog+0x6b4/0xa20 kernel/hung_task.c:239 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] 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: 14965 Comm: init Not tainted 4.9.120-gf85543b #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801b9358000 task.stack: ffff8801c2a40000 RIP: 0010:[] c [] inb arch/x86/include/asm/io.h:316 [inline] RIP: 0010:[] c [] io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:414 RSP: 0018:ffff8801c2a47520 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: ffffffff82154ac1 RDI: ffffffff864ace38 RBP: ffff8801c2a47530 R08: ffffffff855903b0 R09: 0000000000000001 R10: ffff8801b9358000 R11: ffff8801c2a47307 R12: ffffffff864ace00 R13: 0000000000000020 R14: fffffbfff0c95a07 R15: fffffbfff0c959c9 FS: 00007fccd3dfe7a0(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fccd3511a30 CR3: 00000001c5d90000 CR4: 00000000001606f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: ffffffff864ace00c 000000000000270bc ffff8801c2a47580c ffffffff821566e4c ffff8801c2a475b8c ffffffff864ace48c ffffffff864ad03ac ffffffff864ace00c 0000000000000034c ffffffff82156830c dffffc0000000000c 0000000000000034c Call Trace: [] serial_in drivers/tty/serial/8250/8250.h:111 [inline] [] wait_for_xmitr+0x94/0x1e0 drivers/tty/serial/8250/8250_port.c:1998 [] serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3104 [] uart_console_write+0x59/0xf0 drivers/tty/serial/serial_core.c:1859 [] serial8250_console_write+0x528/0x820 drivers/tty/serial/8250/8250_port.c:3170 [] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594 [] call_console_drivers.isra.18.constprop.28+0x1ad/0x360 kernel/printk/printk.c:1589 [] console_unlock+0x42f/0xb40 kernel/printk/printk.c:2449 [] console_device+0x97/0xc0 kernel/printk/printk.c:2557 [] tty_lookup_driver drivers/tty/tty_io.c:2003 [inline] [] tty_open_by_driver drivers/tty/tty_io.c:2048 [inline] [] tty_open+0x71a/0xe20 drivers/tty/tty_io.c:2125 [] chrdev_open+0x22d/0x4c0 fs/char_dev.c:392 [] do_dentry_open+0x703/0xc80 fs/open.c:766 [] vfs_open+0x11c/0x210 fs/open.c:879 [] do_last fs/namei.c:3410 [inline] [] path_openat+0x758/0x3590 fs/namei.c:3534 [] do_filp_open+0x197/0x270 fs/namei.c:3568 [] do_sys_open+0x30d/0x5c0 fs/open.c:1072 [] SYSC_open fs/open.c:1090 [inline] [] SyS_open+0x2d/0x40 fs/open.c:1085 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c24 cc9 c00 c00 c00 c49 c8d c7c c24 c38 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c48 c89 cfa c48 cc1 cea c03 cd3 ce3 c80 c3c c02 c00 c75 c17 c41 c03 c5c c24 c38 c89 cda cec c<5b> c0f cb6 cc0 c41 c5c c5d cc3 ce8 c58 c9c c3e cff ceb cc2 ce8 cb1 c9c c3e cff ceb c