input: syz1 as /devices/virtual/input/input314
------------[ cut here ]------------
refcount_t: increment on 0; use-after-free.
WARNING: CPU: 0 PID: 9297 at lib/refcount.c:156 refcount_inc_checked lib/refcount.c:156 [inline]
WARNING: CPU: 0 PID: 9297 at lib/refcount.c:156 refcount_inc_checked+0x61/0x70 lib/refcount.c:154
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 9297 Comm: syz-executor858 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2dc/0x755 kernel/panic.c:219
 __warn.cold+0x20/0x4c kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:refcount_inc_checked lib/refcount.c:156 [inline]
RIP: 0010:refcount_inc_checked+0x61/0x70 lib/refcount.c:154
Code: 1d de fd 82 06 31 ff 89 de e8 bb 4f 33 fe 84 db 75 dd e8 72 4e 33 fe 48 c7 c7 20 ac e6 87 c6 05 be fd 82 06 01 e8 17 70 04 fe <0f> 0b eb c1 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41
RSP: 0018:ffff8880997278b8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815ca1f6 RDI: ffffed10132e4f09
RBP: ffff8880997278c8 R08: ffff8880858026c0 R09: fffffbfff14ef938
R10: fffffbfff14ef937 R11: ffffffff8a77c9bf R12: ffff8880970cb1c0
R13: 0000000000000000 R14: ffff88808dd140c0 R15: ffff8880a7959490
 kref_get include/linux/kref.h:45 [inline]
 kobject_get+0x66/0xc0 lib/kobject.c:644
 cdev_get+0x60/0xb0 fs/char_dev.c:355
 chrdev_open+0xb0/0x6b0 fs/char_dev.c:400
 do_dentry_open+0x4df/0x1250 fs/open.c:797
 vfs_open+0xa0/0xd0 fs/open.c:906
 do_last fs/namei.c:3408 [inline]
 path_openat+0x10e9/0x4630 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3fe/0x5d0 fs/open.c:1089
 __do_sys_open fs/open.c:1107 [inline]
 __se_sys_open fs/open.c:1102 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1102
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4017b0
Code: 01 f0 ff ff 0f 83 40 0e 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 1d 6f 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 14 0e 00 00 c3 48 83 ec 08 e8 7a 03 00 00
RSP: 002b:00007ffd281845d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004017b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd281845f0
RBP: 0000000000000000 R08: 000000000000000f R09: 0000000000402ae0
R10: 0000000000402ae0 R11: 0000000000000246 R12: 0000000000000034
R13: 0000000000402ae0 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..