input: syz1 as /devices/virtual/input/input13181
input: syz1 as /devices/virtual/input/input13183
input: syz1 as /devices/virtual/input/input13185
input: syz1 as /devices/virtual/input/input13184
------------[ cut here ]------------
WARNING: CPU: 1 PID: 21037 at ./include/linux/kref.h:46 kref_get include/linux/kref.h:46 [inline]
WARNING: CPU: 1 PID: 21037 at ./include/linux/kref.h:46 kobject_get+0xd1/0xf0 lib/kobject.c:596
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 21037 Comm: syz-executor.0 Not tainted 4.9.141+ #23
 ffff8801cee677d0 ffffffff81b42e79 ffffffff82a38ce0 00000000ffffffff
 ffffffff82b3b500 0000000000000001 0000000000000009 ffff8801cee67890
 ffffffff813f7125 0000000041b58ab3 ffffffff82e2b62b ffffffff813f6f66
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff813f7125>] panic+0x1bf/0x39f kernel/panic.c:179
 [<ffffffff813f7362>] __warn.cold.8+0x2f/0x2f kernel/panic.c:542
 [<ffffffff810dc02c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585
 [<ffffffff81b492d1>] kref_get include/linux/kref.h:46 [inline]
 [<ffffffff81b492d1>] kobject_get+0xd1/0xf0 lib/kobject.c:596
 [<ffffffff815172d1>] cdev_get+0x51/0xa0 fs/char_dev.c:333
 [<ffffffff81517a5d>] chrdev_open+0xad/0x5c0 fs/char_dev.c:378
 [<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
 [<ffffffff8161882a>] C_SYSC_open fs/compat.c:1081 [inline]
 [<ffffffff8161882a>] compat_SyS_open+0x2a/0x40 fs/compat.c:1079
 [<ffffffff81006311>] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline]
 [<ffffffff81006311>] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390
 [<ffffffff82818de0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Kernel Offset: disabled
Rebooting in 86400 seconds..