audit: type=1400 audit(1567867178.584:3411): avc: denied { read } for pid=1258 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 INFO: task init:31013 blocked for more than 140 seconds. Not tainted 4.9.191+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29136 31013 1 0x00000000 0000000000000087 ffff8801d2e9c740 ffff8801c95fac00 ffff8801db621000 ffff8801d2528000 ffff8801db621018 ffff8801a24cf758 ffffffff8281ac0e ffff8801a24cf698 ffffffff812499a1 00ff8801a24cf750 ffff8801db6218f0 Call Trace: [<0000000094b46f36>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<00000000aa2e612a>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<0000000058a0bc38>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<0000000058a0bc38>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<0000000068b3ef75>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] [<0000000068b3ef75>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 [<00000000480e9ae0>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000a08bbe42>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<000000004009ee94>] vfs_open+0x105/0x230 fs/open.c:904 [<0000000067747eae>] do_last fs/namei.c:3541 [inline] [<0000000067747eae>] path_openat+0xbf5/0x2f60 fs/namei.c:3665 [<00000000112c37a2>] do_filp_open+0x1a1/0x280 fs/namei.c:3699 [<00000000063293f9>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<00000000af6e6511>] SYSC_open fs/open.c:1115 [inline] [<00000000af6e6511>] SyS_open+0x2d/0x40 fs/open.c:1110 [<000000004fe18dca>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000003f410f04>] 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: [<00000000e5d367d8>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000e5d367d8>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<000000004fda3619>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 1 lock held by rsyslogd/1902: #0: (&f->f_pos_lock){+.+.+.}, at: [<000000009d3c4925>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2029: #0: (&tty->ldisc_sem){++++++}, at: [<000000008be35945>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.+.}, at: [<00000000cfce9797>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by init/31013: #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/31014: #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/31017: #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/31018: #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/31020: #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000068b3ef75>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.191+ #0 ffff8801d98f7cc8 ffffffff81b67171 0000000000000000 0000000000000000 0000000000000000 ffffffff81099f01 dffffc0000000000 ffff8801d98f7d00 ffffffff81b7240c 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<0000000048e6e5f9>] __dump_stack lib/dump_stack.c:15 [inline] [<0000000048e6e5f9>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008ba28fa1>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000a0186e8b>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<00000000f4917864>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<000000000504cf5c>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<000000000504cf5c>] check_hung_task kernel/hung_task.c:126 [inline] [<000000000504cf5c>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<000000000504cf5c>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<000000003bb2308d>] kthread+0x278/0x310 kernel/kthread.c:211 [<000000003b80ad72>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 31015 Comm: init Not tainted 4.9.191+ #0 task: 00000000bbae79b7 task.stack: 00000000b1d4808c RIP: 0010:[] c [<00000000a8af560d>] preempt_count arch/x86/include/asm/preempt.h:22 [inline] RIP: 0010:[] c [<00000000a8af560d>] preempt_latency_stop kernel/sched/core.c:3253 [inline] RIP: 0010:[] c [<00000000a8af560d>] preempt_count_sub+0x57/0x170 kernel/sched/core.c:3273 RSP: 0018:ffff8801d5e77528 EFLAGS: 00000002 RAX: 0000000080000002 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff81bcd7cc RDI: 0000000000000001 RBP: ffff8801d5e77530 R08: 0000000000000001 R09: 0000000000003921 R10: ffff8801a3643880 R11: 0000000000000001 R12: 0000051939673e71 R13: 0000000000000001 R14: 00000000000008fd R15: fffffbfff096d1cd FS: 00007f91839027a0(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000175f660 CR3: 00000001ad088000 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: 00000519396745bfc ffff8801d5e77560c ffffffff81b960ebc ffffffff84b68e20c 0000000000002708c 0000000000000020c fffffbfff096d20bc ffff8801d5e77570c ffffffff81b95fc0c ffff8801d5e77580c ffffffff81b95ffac ffff8801d5e775d0c Call Trace: [<00000000ad152be6>] delay_tsc+0x6b/0xc0 arch/x86/lib/delay.c:65 [<000000008dc79f6f>] __delay+0x10/0x20 arch/x86/lib/delay.c:160 [<0000000050a8f043>] __const_udelay+0x2a/0x30 arch/x86/lib/delay.c:174 [<000000006bcf0a02>] wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:2005 [<00000000ef5c8d0b>] serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:3103 [<000000008569db2b>] uart_console_write+0x56/0xe0 drivers/tty/serial/serial_core.c:1885 [<0000000020bf44c7>] serial8250_console_write+0x2fb/0x860 drivers/tty/serial/8250/8250_port.c:3169 [<0000000033d9fe9c>] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594 [<00000000f37df59a>] call_console_drivers.isra.0.constprop.0+0x1ac/0x360 kernel/printk/printk.c:1594 [<0000000063741c4d>] console_unlock+0x47c/0xb20 kernel/printk/printk.c:2454 [<00000000d1a1fa02>] console_device+0x97/0xc0 kernel/printk/printk.c:2562 [<000000003342c7e9>] tty_lookup_driver drivers/tty/tty_io.c:2018 [inline] [<000000003342c7e9>] tty_open_by_driver drivers/tty/tty_io.c:2063 [inline] [<000000003342c7e9>] tty_open+0x796/0xe10 drivers/tty/tty_io.c:2140 [<00000000480e9ae0>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000a08bbe42>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<000000004009ee94>] vfs_open+0x105/0x230 fs/open.c:904 [<0000000067747eae>] do_last fs/namei.c:3541 [inline] [<0000000067747eae>] path_openat+0xbf5/0x2f60 fs/namei.c:3665 [<00000000112c37a2>] do_filp_open+0x1a1/0x280 fs/namei.c:3699 [<00000000063293f9>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<00000000af6e6511>] SYSC_open fs/open.c:1115 [inline] [<00000000af6e6511>] SyS_open+0x2d/0x40 fs/open.c:1110 [<000000004fe18dca>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000003f410f04>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c08 c84 cd2 c0f c85 c07 c01 c00 c00 c8b c0d ca5 cd9 c08 c03 c85 cc9 c75 c18 c65 c8b c05 cea ccb cea c7e c25 cff cff cff c7f c39 cc3 c7f c1b c81 cfb cfe c00 c00 c00 c76 c75 c<65> c8b c05 cd2 ccb cea c7e cf7 cdb c65 c01 c1d cc9 ccb cea c7e c5b c5d cc3 ce8 cb1 c