input: syz1 as /devices/virtual/input/input207 input: syz1 as /devices/virtual/input/input208 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 15631 at ./include/linux/kref.h:46 kref_get include/linux/kref.h:46 [inline] WARNING: CPU: 1 PID: 15631 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: 15631 Comm: syz-executor6 Not tainted 4.9.125+ #37 ffff8801a2a977e0 ffffffff81af0ae9 ffffffff82838ba0 00000000ffffffff 0000000000000000 0000000000000001 000000000000002e ffff8801a2a978a0 ffffffff813df095 0000000041b58ab3 ffffffff82c28773 ffffffff813deed6 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x39f kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] kref_get include/linux/kref.h:46 [inline] [] kobject_get+0xd1/0xf0 lib/kobject.c:596 [] cdev_get+0x51/0xa0 fs/char_dev.c:333 [] chrdev_open+0xad/0x4c0 fs/char_dev.c:378 [] do_dentry_open+0x3ef/0xc90 fs/open.c:766 [] vfs_open+0x11c/0x210 fs/open.c:879 [] do_last fs/namei.c:3410 [inline] [] path_openat+0x542/0x2790 fs/namei.c:3534 [] do_filp_open+0x197/0x270 fs/namei.c:3568 [] do_sys_open+0x30d/0x5c0 fs/open.c:1072 [] SYSC_open fs/open.c:1090 [inline] [] SyS_open+0x2d/0x40 fs/open.c:1085 [] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..