Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 313625 pages reserved INFO: task init:26713 blocked for more than 140 seconds. Not tainted 4.9.185+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D 29304 26713 1 0x00000000 ffff8801d1eb5f00 ffff8801cbca5800 ffff8801db721000 ffff8801ce79df00 ffff8801db721018 ffff8801cbd07758 ffffffff8280c5ae ffff8801d1eb67c8 ffff8801d1eb67a0 00ff8801d1eb67d0 ffff8801db7218f0Call Trace: [<00000000e805d6b1>] schedule+0x92/0x1c0 /kernel/sched/core.c:3546 [<000000004a524803>] schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3579 [<0000000045adf8b2>] __mutex_lock_common /kernel/locking/mutex.c:582 [inline] [<0000000045adf8b2>] mutex_lock_nested+0x38d/0x920 /kernel/locking/mutex.c:621 [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 [<00000000ac1f215d>] chrdev_open+0x230/0x630 /fs/char_dev.c:398 [<0000000082969997>] do_dentry_open+0x422/0xd20 /fs/open.c:772 [<00000000460bcad1>] vfs_open+0x105/0x230 /fs/open.c:885 [<0000000020647c2a>] do_last /fs/namei.c:3457 [inline] [<0000000020647c2a>] path_openat+0xbf5/0x2f60 /fs/namei.c:3581 [<000000008a234687>] do_filp_open+0x1a1/0x280 /fs/namei.c:3615 [<000000007d532798>] do_sys_open+0x2f0/0x610 /fs/open.c:1078 [<000000008259dda0>] SYSC_open /fs/open.c:1096 [inline] [<000000008259dda0>] SyS_open+0x2d/0x40 /fs/open.c:1091 [<000000002fe3feb8>] do_syscall_64+0x1ad/0x5c0 /arch/x86/entry/common.c:288 [<0000000048112c87>] 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: [<0000000062004ca3>] check_hung_uninterruptible_tasks /kernel/hung_task.c:169 [inline] (rcu_read_lock){......}, at: [<0000000062004ca3>] watchdog+0x14b/0xaf0 /kernel/hung_task.c:263 (tasklist_lock){.+.+..}, at: [<00000000b019d113>] debug_show_all_locks+0x7f/0x21f /kernel/locking/lockdep.c:4336 #0: (&f->f_pos_lock){+.+.+.}, at: [<0000000072f8949f>] __fdget_pos+0xa8/0xd0 /fs/file.c:782 #0: (&tty->ldisc_sem){++++++}, at: [<00000000a8cd5ea5>] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 (&ldata->atomic_read_lock){+.+...}, at: [<00000000c294953f>] n_tty_read+0x1fe/0x1820 /drivers/tty/n_tty.c:2156 #0: (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 #0: (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 #0: (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 #0: (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 #0: (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 #0: (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open_by_driver /drivers/tty/tty_io.c:2062 [inline] (tty_mutex){+.+.+.}, at: [<00000000f8c0bed3>] tty_open+0x3f9/0xe10 /drivers/tty/tty_io.c:2140 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.185+ #8 ffff8801d98d7cc8 ffffffff81b5a081 0000000000000001 0000000000000000 0000000000000001 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b6531c 0000000000000001 0000000000000000 0000000000000001Call Trace: [<000000005273154a>] __dump_stack /lib/dump_stack.c:15 [inline] [<000000005273154a>] dump_stack+0xc1/0x120 /lib/dump_stack.c:51 [<00000000c659882b>] nmi_cpu_backtrace.cold+0x47/0x87 /lib/nmi_backtrace.c:99 [<00000000999922bc>] nmi_trigger_cpumask_backtrace+0x124/0x155 /lib/nmi_backtrace.c:60 [<00000000ad008a05>] arch_trigger_cpumask_backtrace+0x14/0x20 /arch/x86/kernel/apic/hw_nmi.c:37 [<00000000ed7b62e2>] trigger_all_cpu_backtrace /./include/linux/nmi.h:58 [inline] [<00000000ed7b62e2>] check_hung_task /kernel/hung_task.c:126 [inline] [<00000000ed7b62e2>] check_hung_uninterruptible_tasks /kernel/hung_task.c:183 [inline] [<00000000ed7b62e2>] watchdog+0x670/0xaf0 /kernel/hung_task.c:263 [<000000000eaa6f6c>] kthread+0x278/0x310 /kernel/kthread.c:211 [<00000000b39b3cc0>] ret_from_fork+0x5c/0x70 /arch/x86/entry/entry_64.S:375 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2273 Comm: syz-executor842 Not tainted 4.9.185+ #8 task: 000000003a4cf6af task.stack: 000000000fb41deb RIP: 0010:[] c [<000000002dc01e5f>] io_serial_in+0x6b/0x90 /drivers/tty/serial/8250/8250_port.c:414 RSP: 0018:ffff8801c8577408 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: ffffffff81d79bb1 RDI: ffffffff84b67d18 RBP: ffff8801c8577418 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff841d66ac R12: ffffffff84b67ce0 R13: 0000000000000020 R14: fffffbfff096cfe3 R15: fffffbfff096cfa5 FS: 0000000000ecc880(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004bf788 CR3: 00000001cb299000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffffffff84b67ce0c 000000000000270fc ffff8801c8577468c ffffffff81d7be54c 0000000000000000c ffffffff84b67d28c ffffffff84b67f1ac ffffffff841d6670c ffffffff84b67ce0c 000000000000003ac dffffc0000000000c 000000000000003ac Call Trace: [<000000007cce8750>] serial_in /drivers/tty/serial/8250/8250.h:111 [inline] [<000000007cce8750>] wait_for_xmitr+0x94/0x1e0 /drivers/tty/serial/8250/8250_port.c:1997 [<000000001fbe4c79>] serial8250_console_putchar+0x20/0x60 /drivers/tty/serial/8250/8250_port.c:3103 [<000000005c3d449b>] uart_console_write+0x56/0xe0 /drivers/tty/serial/serial_core.c:1880 [<000000007c73d59d>] serial8250_console_write+0x2fb/0x860 /drivers/tty/serial/8250/8250_port.c:3169 [<00000000b6febddf>] univ8250_console_write+0x5f/0x70 /drivers/tty/serial/8250/8250_core.c:594 [<00000000ade00732>] call_console_drivers.isra.0.constprop.0+0x1ac/0x360 /kernel/printk/printk.c:1594 [<000000003a4d2cdc>] console_unlock+0x47c/0xb20 /kernel/printk/printk.c:2454 [<00000000dab81fbf>] vprintk_emit+0x43f/0x6f0 /kernel/printk/printk.c:1908 [<00000000782fa420>] vprintk+0x28/0x30 /kernel/printk/printk.c:1918 [<00000000305d8346>] vprintk_func /kernel/printk/internal.h:36 [inline] [<00000000305d8346>] printk+0xc2/0xf5 /kernel/printk/printk.c:1980 [<00000000391b7a01>] warn_alloc.cold+0x1f/0x93 /mm/page_alloc.c:3059 [<000000002925c2c1>] __vmalloc_node_range+0x363/0x610 /mm/vmalloc.c:1727 [<0000000086eb42fd>] __vmalloc_node /mm/vmalloc.c:1749 [inline] [<0000000086eb42fd>] __vmalloc_node_flags /mm/vmalloc.c:1763 [inline] [<0000000086eb42fd>] vmalloc+0x5c/0x70 /mm/vmalloc.c:1778 [<00000000a131d239>] xt_alloc_entry_offsets+0x44/0x50 /net/netfilter/x_tables.c:758 [<00000000e37c5b38>] translate_table+0x215/0x1650 /net/ipv4/netfilter/ip_tables.c:705 [<0000000014ca7240>] do_replace /net/ipv4/netfilter/ip_tables.c:1157 [inline] [<0000000014ca7240>] do_ipt_set_ctl+0x2d4/0x470 /net/ipv4/netfilter/ip_tables.c:1693 [<000000006f1b098c>] nf_sockopt /net/netfilter/nf_sockopt.c:105 [inline] [<000000006f1b098c>] nf_setsockopt+0x6d/0xc0 /net/netfilter/nf_sockopt.c:114 [<000000003de5dfc9>] ip_setsockopt /net/ipv4/ip_sockglue.c:1247 [inline] [<000000003de5dfc9>] ip_setsockopt+0x8a/0xa0 /net/ipv4/ip_sockglue.c:1232 [<000000002dc37303>] udp_setsockopt+0x4e/0x90 /net/ipv4/udp.c:2114 [<00000000ef2ff348>] ipv6_setsockopt+0xa4/0x140 /net/ipv6/ipv6_sockglue.c:912 [<000000000cc63e34>] tcp_setsockopt /net/ipv4/tcp.c:2757 [inline] [<000000000cc63e34>] tcp_setsockopt+0x8a/0xe0 /net/ipv4/tcp.c:2751 [<00000000dc120179>] sock_common_setsockopt+0x9a/0xe0 /net/core/sock.c:2710 [<00000000070be213>] SYSC_setsockopt /net/socket.c:1786 [inline] [<00000000070be213>] SyS_setsockopt+0x159/0x240 /net/socket.c:1765 [<000000002fe3feb8>] do_syscall_64+0x1ad/0x5c0 /arch/x86/entry/common.c:288 [<0000000048112c87>] 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 c08 c32 c78 cff ceb cc2 ce8 c61 c32 c78 cff ceb c