hid-generic 0000:0000:0000.01DF: unknown main item tag 0x0
hid-generic 0000:0000:0000.01DF: unknown main item tag 0x0
hid-generic 0000:0000:0000.01DF: unknown main item tag 0x0
hid-generic 0000:0000:0000.01DF: hidraw2: <UNKNOWN> HID v0.00 Device [syz0] on syz0
audit: type=1400 audit(1573726497.631:182808): avc:  denied  { sys_admin } for  pid=2103 comm="syz-executor.3" capability=21  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
INFO: task init:3325 blocked for more than 140 seconds.
      Not tainted 4.9.141+ #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D29224  3325      1 0x00000000
 ffff8801cbefc740 0000000000000000 ffff8801d94bcd00 ffff8801da5fc740
 ffff8801db621018 ffff8801ccc37738 ffffffff828075c2 0000000000000000
 ffff8801cbefcff0 ffffed00397df9fd 00ff8801cbefc740 ffff8801db6218f0
Call Trace:
 [<ffffffff82808aef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff828094a3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3586
 [<ffffffff8280b51d>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8280b51d>] mutex_lock_nested+0x38d/0x900 kernel/locking/mutex.c:621
 [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
 [<ffffffff81517bdd>] chrdev_open+0x22d/0x5c0 fs/char_dev.c:392
 [<ffffffff81501e3f>] do_dentry_open+0x3ef/0xc90 fs/open.c:766
 [<ffffffff8150576c>] vfs_open+0x11c/0x210 fs/open.c:879
 [<ffffffff8153c542>] do_last fs/namei.c:3410 [inline]
 [<ffffffff8153c542>] path_openat+0x542/0x2790 fs/namei.c:3534
 [<ffffffff81541617>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff8150617d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff8150645d>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff8150645d>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] 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: [<ffffffff8131c0cc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe63f>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1894:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156cc7c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2021:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82815952>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81d37362>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by kworker/u4:13/16483:
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff81130f0c>] process_one_work+0x73c/0x15f0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.+.}, at: [<ffffffff81130f44>] process_one_work+0x774/0x15f0 kernel/workqueue.c:2089
1 lock held by init/3325:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/3326:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/3327:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/3328:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/3329:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.141+ #1
 ffff8801d9907d08 ffffffff81b42e79 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810983b0 ffff8801d9907d40
 ffffffff81b4df89 0000000000000001 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b4df89>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4df1c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810984b4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c65d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c65d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c65d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c65d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff81142c3d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82817a5c>] 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: 2103 Comm: syz-executor.3 Not tainted 4.9.141+ #1
task: ffff8801d1858000 task.stack: ffff8801a82e0000
RIP: 0010:[<ffffffff81243c5c>] 
c [<ffffffff81243c5c>] debug_lockdep_rcu_enabled+0x4c/0x90 kernel/rcu/update.c:264
RSP: 0018:ffff8801a82e7768  EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 0000000000000046 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffffff831f2500
RBP: ffff8801a82e7768 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff842366a0
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000e72940(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe1982f2e8 CR3: 00000001a82b2000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801a82e77e0
c ffffffff8120c93e
c 0000000000000000
c ffff8801d18588a8
c
 0000000600000007
c ffff8801d1858000
c ffffffff82816fba
c 0000000000000206
c
 0000000000000000
c 0000000100000000
c 0000000000000001
c ffffffff84236688
c
Call Trace:
 [<ffffffff8120c93e>] trace_lock_acquire include/trace/events/lock.h:12 [inline]
 [<ffffffff8120c93e>] lock_acquire+0x19e/0x3e0 kernel/locking/lockdep.c:3755
 [<ffffffff8281760f>] __raw_spin_trylock include/linux/spinlock_api_smp.h:92 [inline]
 [<ffffffff8281760f>] _raw_spin_trylock+0x6f/0x90 kernel/locking/spinlock.c:135
 [<ffffffff819eaa9b>] avc_reclaim_node security/selinux/avc.c:526 [inline]
 [<ffffffff819eaa9b>] avc_alloc_node+0x12b/0x3c0 security/selinux/avc.c:559
 [<ffffffff819ebf18>] avc_insert security/selinux/avc.c:670 [inline]
 [<ffffffff819ebf18>] avc_compute_av+0x178/0x610 security/selinux/avc.c:976
 [<ffffffff819ed96d>] avc_has_perm_noaudit+0x29d/0x2f0 security/selinux/avc.c:1112
 [<ffffffff819fb3fd>] selinux_inode_permission+0x32d/0x4b0 security/selinux/hooks.c:3038
 [<ffffffff819e47e9>] security_inode_permission+0xb9/0x100 security/security.c:611
 [<ffffffff8152b9a3>] __inode_permission2+0x93/0x2d0 fs/namei.c:435
 [<ffffffff8152bc3f>] inode_permission2+0x2f/0x110 fs/namei.c:485
 [<ffffffff8153aaf6>] may_lookup fs/namei.c:1689 [inline]
 [<ffffffff8153aaf6>] link_path_walk+0x936/0x1230 fs/namei.c:2064
 [<ffffffff8153b9a6>] path_mountpoint+0x66/0x6c0 fs/namei.c:2696
 [<ffffffff8153fbcb>] filename_mountpoint.part.19+0x15b/0x310 fs/namei.c:2717
 [<ffffffff81541379>] filename_mountpoint fs/namei.c:2714 [inline]
 [<ffffffff81541379>] user_path_mountpoint_at+0x49/0x70 fs/namei.c:2747
 [<ffffffff8157752d>] SYSC_umount fs/namespace.c:1722 [inline]
 [<ffffffff8157752d>] SyS_umount+0x13d/0xcf0 fs/namespace.c:1706
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c89 
cf8 
c83 
ce0 
c07 
c83 
cc0 
c03 
c38 
cd0 
c7c 
c04 
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cd2 
c75 
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c8b 
c15 
c95 
c3e 
c1a 
c02 
c85 
cd2 
c74 
c3e 
c48 
cc7 
cc7 
c00 
c25 
c1f 
c83 
c48 
cb8 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c<48> 
c89 
cfa 
c48 
cc1 
cea 
c03 
c0f 
cb6 
c14 
c02 
c48 
c89 
cf8 
c83 
ce0 
c07 
c83 
cc0 
c03 
c38 
c