input: syz1 as /devices/virtual/input/input17144 input: syz1 as /devices/virtual/input/input17145 input: syz1 as /devices/virtual/input/input17146 input: syz1 as /devices/virtual/input/input17148 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2762 at include/linux/kref.h:47 kref_get include/linux/kref.h:47 [inline]() WARNING: CPU: 0 PID: 2762 at include/linux/kref.h:47 kobject_get+0x7a/0x90 lib/kobject.c:584() Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 2762 Comm: syz-executor.3 Not tainted 4.1.0 #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffffffff82e32302 ffff88012b74bad8 ffffffff8263cd0b 0000000000000032 ffffffff82e32413 ffff88012b74bb58 ffffffff82638b9e ffff88012b74baf8 ffffffff00000008 ffff88012b74bb68 ffff88012b74bb08 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0x4f/0x7b lib/dump_stack.c:50 [] panic+0xcd/0x211 kernel/panic.c:111 [] warn_slowpath_common+0xbb/0xc0 kernel/panic.c:442 [] warn_slowpath_null+0x15/0x20 kernel/panic.c:479 [] kref_get include/linux/kref.h:47 [inline] [] kobject_get+0x7a/0x90 lib/kobject.c:584 [] cdev_get+0x27/0x50 fs/char_dev.c:329 [] chrdev_open+0x3a/0x1c0 fs/char_dev.c:374 [] do_dentry_open+0x227/0x350 fs/open.c:734 [] vfs_open+0x49/0x50 fs/open.c:871 [] do_last+0x257/0x1720 fs/namei.c:3104 [] path_openat+0x7b/0x6a0 fs/namei.c:3243 [] do_filp_open+0x35/0xb0 fs/namei.c:3290 [] do_sys_open+0x126/0x220 fs/open.c:1014 [] SYSC_open fs/open.c:1032 [inline] [] SyS_open+0x19/0x20 fs/open.c:1027 [] system_call_fastpath+0x16/0x7a Kernel Offset: disabled