------------[ cut here ]------------
WARNING: CPU: 1 PID: 9327 at fs/attr.c:213 notify_change+0xa2f/0xd10 fs/attr.c:213
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 9327 Comm: syz-executor.1 Not tainted 4.14.126 #20
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: '9p-2' (ffff8880635909d0): kobject_add_internal: parent: 'bdi', set: 'devices'
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x138/0x19c lib/dump_stack.c:53
 panic+0x1f2/0x426 kernel/panic.c:182
 __warn.cold+0x2f/0x36 kernel/panic.c:546
kobject: '9p-2' (ffff8880635909d0): kobject_uevent_env
 report_bug+0x216/0x254 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x1bb/0x310 arch/x86/kernel/traps.c:295
kobject: '9p-2' (ffff8880635909d0): fill_kobj_path: path = '/devices/virtual/bdi/9p-2'
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:960
RIP: 0010:notify_change+0xa2f/0xd10 fs/attr.c:213
kobject: 'loop0' (ffff8880a49b6de0): kobject_uevent_env
RSP: 0018:ffff888064c875b0 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff8880a48fb630 RCX: ffffc90009a6b000
RDX: 0000000000011c03 RSI: ffffffff8193a7cf RDI: ffff8880a48fb710
RBP: ffff888064c87600 R08: ffff888063592180 R09: 0000000000000000
R10: 0000000000000000 R11: ffff888063592180 R12: ffff888064c87650
R13: 0000000000004200 R14: ffff8880a48fb630 R15: ffff888064c876c0
 __remove_privs fs/inode.c:1806 [inline]
 file_remove_privs+0x229/0x430 fs/inode.c:1828
 __generic_file_write_iter+0x15e/0x5b0 mm/filemap.c:3095
 blkdev_write_iter fs/block_dev.c:1914 [inline]
 blkdev_write_iter+0x1e8/0x3a0 fs/block_dev.c:1891
 call_write_iter include/linux/fs.h:1777 [inline]
 do_iter_readv_writev+0x418/0x670 fs/read_write.c:675
kobject: 'loop0' (ffff8880a49b6de0): fill_kobj_path: path = '/devices/virtual/block/loop0'
 do_iter_write fs/read_write.c:954 [inline]
 do_iter_write+0x154/0x540 fs/read_write.c:935
 vfs_iter_write+0x77/0xb0 fs/read_write.c:967
 iter_file_splice_write+0x572/0xad0 fs/splice.c:749
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x123/0x190 fs/splice.c:1018
kobject: 'input15' (ffff8880a17e67a0): kobject_add_internal: parent: 'input', set: 'devices'
 splice_direct_to_actor+0x29e/0x7b0 fs/splice.c:973
kobject: 'loop0' (ffff8880a49b6de0): kobject_uevent_env
kobject: 'loop0' (ffff8880a49b6de0): fill_kobj_path: path = '/devices/virtual/block/loop0'
 do_splice_direct+0x18d/0x230 fs/splice.c:1061
 do_sendfile+0x4db/0xbd0 fs/read_write.c:1441
 SYSC_sendfile64 fs/read_write.c:1502 [inline]
 SyS_sendfile64+0x102/0x110 fs/read_write.c:1488
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4592c9
RSP: 002b:00007fe48854cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 000000010200000e R11: 0000000000000246 R12: 00007fe48854d6d4
R13: 00000000004c689d R14: 00000000004db828 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..