WARNING: CPU: 1 PID: 13407 at fs/attr.c:234 notify_change+0xca0/0xfb0 fs/attr.c:234
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 13407 Comm: syz-executor.0 Not tainted 4.19.51 #23
kobject: 'input1393' (00000000daaca636): kobject_cleanup, parent           (null)
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+0x263/0x507 kernel/panic.c:185
 __warn.cold+0x20/0x4a kernel/panic.c:540
 report_bug+0x263/0x2b0 lib/bug.c:186
kobject: 'input1393' (00000000daaca636): calling ktype release
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
kobject: 'input1393': free name
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1013
RIP: 0010:notify_change+0xca0/0xfb0 fs/attr.c:234
kobject: 'input1394' (00000000166f5231): kobject_cleanup, parent           (null)
Code: f6 e6 09 00 e8 11 55 b9 ff 4c 8b 7c 24 20 4c 89 ff e8 b4 0e 43 01 89 de 4c 89 ff e8 9a 2a 43 01 e9 35 fa ff ff e8 f0 54 b9 ff <0f> 0b e9 44 f4 ff ff e8 e4 54 b9 ff 44 89 f3 4c 89 ea 48 b8 00 00
RSP: 0018:ffff888059437760 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 0000000000004200 RCX: ffffc90006080000
RDX: 00000000000001cd RSI: ffffffff81b1b200 RDI: 0000000000000007
kobject: 'input1394' (00000000166f5231): calling ktype release
RBP: ffff8880594377b0 R08: ffff888059c3e180 R09: ffffed10148dc58e
R10: ffffed10148dc58d R11: ffff8880a46e2c6f R12: ffff888059437800
R13: ffff8880a46e2b90 R14: 0000000000000000 R15: ffff888059437890
kobject: 'loop2' (0000000078c0989b): kobject_uevent_env
 __remove_privs fs/inode.c:1806 [inline]
 file_remove_privs+0x2a9/0x480 fs/inode.c:1828
kobject: 'loop2' (0000000078c0989b): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'input1394': free name
 __generic_file_write_iter+0x15e/0x630 mm/filemap.c:3210
kobject: 'loop3' (000000007f3478a3): kobject_uevent_env
kobject: 'loop3' (000000007f3478a3): fill_kobj_path: path = '/devices/virtual/block/loop3'
 blkdev_write_iter fs/block_dev.c:1924 [inline]
 blkdev_write_iter+0x233/0x440 fs/block_dev.c:1901
 call_write_iter include/linux/fs.h:1820 [inline]
 do_iter_readv_writev+0x558/0x830 fs/read_write.c:681
kobject: 'input1395' (000000005d84b587): kobject_cleanup, parent           (null)
 do_iter_write fs/read_write.c:960 [inline]
 do_iter_write+0x184/0x5f0 fs/read_write.c:941
 vfs_iter_write+0x77/0xb0 fs/read_write.c:973
 iter_file_splice_write+0x661/0xbd0 fs/splice.c:750
kobject: 'input1395' (000000005d84b587): calling ktype release
 do_splice_from fs/splice.c:852 [inline]
 do_splice+0x642/0x12c0 fs/splice.c:1148
 __do_sys_splice fs/splice.c:1415 [inline]
 __se_sys_splice fs/splice.c:1395 [inline]
 __x64_sys_splice+0x2c6/0x330 fs/splice.c:1395
kobject: 'input1395': free name
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4592c9
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc238479c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
kobject: 'input1396' (00000000d631e97a): kobject_cleanup, parent           (null)
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00000000004592c9
RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000010005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc23847a6d4
R13: 00000000004c87fb R14: 00000000004de630 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..